JP3024366B2 - Video editing equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a video editing apparatus using a medium for storing an image in a digital format.

[0002]

2. Description of the Related Art FIG. 8 is a block diagram of a conventional video editing apparatus. In FIG. 8, reference numeral 801 denotes a digital video storage unit, 802 denotes a random access head frame position holding unit, 803 denotes a random access execution unit, 804 denotes a continuous transfer frame number holding unit, 805 denotes a continuous transfer execution unit, and 806.
Denotes a ring buffer, 807 denotes a video display unit, 808 denotes a cut information editing and holding unit, 809 denotes a random access initialization unit, and 810 denotes a fixed frame number transfer control unit.

The operation of the conventional video editing apparatus configured as described above will be described. First, a digital video is stored in the digital video storage unit 801 such that a continuous frame enters its continuous area. The cut edit information holding unit 808 stores cut information indicating continuous small sections in the digital video storage unit 801 and cut edit information including reproduction order information of each cut, and this represents an edit result. FIG. 9 shows an example of the cut editing information. FIG.
In the example, two cuts of the cut A from the 11th to the 13th frame and the cut B from the 55th to the 60th frame are A
→ The video continuous with B is the edited result.

By the way, the digital video storage unit 801
Is assumed to have the capability of performing one random access and one data transfer of the number of frames during the time when a certain number of frames of video is being reproduced. Also, it is assumed that data cannot be transferred for the number of frames larger than the number of frames during the frame number reproduction time, and two random accesses cannot be made. It is also assumed that during the frame reproduction time shorter than the number of frames, the data transfer of the number of frames cannot be completed in time. This number of frames is referred to as a reproduction cycle frame number, and it is assumed that there are three frames in the example. The ring buffer 806 has a capacity capable of holding six frames, which is twice the number of frames in the reproduction cycle.

[0005] First, the random access initialization unit 809 sets the 11th frame which is the first frame from the cut edit information in the cut edit information holding unit 808 in the random access start frame position holding unit 802. Further, the number of frames of the reproduction cycle of the digital video storage unit 801 is set to 3 in the continuous transfer frame number holding unit 804.

As a result, first, the random access execution unit 8
03, random access to the eleventh frame is performed. Subsequently, three consecutive frames, that is, the eleventh to thirteenth frames are transferred to the ring buffer 806 by the continuous transfer execution unit 805.

The fixed-frame-number transfer control unit 810 is activated when random access and three-frame transfer are completed, and acquires information to be reproduced next to the cut edit information holding unit 808. In the case of this conventional example, since the cut A is all transferred in three frames, the information of the first three frames of the next cut B is obtained. Then, the first 55th frame is set in the random access first frame position holding unit 802. As a result, while the eleventh frame to the thirteenth frame are being reproduced from the ring buffer 806 to the video display unit 807, the random access execution unit 803 randomly accesses the digital video storage unit 801 once, and the continuous transfer execution unit 805 Transfer three consecutive frames from the 55th frame to the 57th frame to the ring buffer 806.

Next, the fixed frame number transfer control unit 810
As before, the information of the next three frames after the cut B is obtained, and the random access head frame position holding unit 802 is obtained.
Since the fifty-fifth frame to the fifty-seventh frame are being reproduced, the random access execution unit 803 makes one random access to the digital video storage unit 801 and the continuous transfer execution unit 805 sets the fifty-eighth frame. Three consecutive frames from the frame to the 60th frame are transferred to the ring buffer 806.

In this way, even if cuts are intermittent in the digital video storage unit 801, continuous reproduction of moving images is realized.

[0010]

FIG. 10 shows another example of the cut editing information. In the example of FIG. 10, a video in which two cuts of cut A from the 11th to 14th frames and cut B from the 55th to 60th frames are continuous from A to B is the editing result. The cut editing information shown in FIG. 10 is stored and operated in the cut editing information holding unit 808 of the conventional video editing apparatus.

First, the random access initializing section 809 sets the 11th frame which is the first frame from the cut edit information in the cut edit information holding section 808 in the random access first frame position holding section 802. Further, the number of frames of the reproduction cycle of the digital video storage unit 801 is set to 3 in the continuous transfer frame number holding unit 804.

As a result, first, the random access execution unit 8
03, random access to the eleventh frame is performed. Subsequently, three consecutive frames, that is, the eleventh to thirteenth frames are transferred to the ring buffer 806 by the continuous transfer execution unit 805.

The fixed-frame-number transfer control unit 810 is activated when random access and three-frame transfer are completed, and acquires information to be reproduced next to the cut edit information holding unit 808. In the case of the example of FIG. 10, one frame remains in the cut A, so that information is obtained. Then, the first fourteenth frame is set in the random access head frame position holding unit 802. As a result, while the eleventh frame to the thirteenth frame are being reproduced from the ring buffer 806 to the video display unit 807, the random access execution unit 803 randomly accesses the digital video storage unit 801 once, and the continuous transfer execution unit 805 Transmits the 14th frame, but since there is no next, it is necessary to perform random access again to transmit the first two frames of cut B. However, the performance of the digital video storage unit 801 is 3
Since two random accesses cannot be made during frame reproduction, only three consecutive frames can be transferred from the 14th frame.

Next, the fixed frame number transfer control unit 810
Since information of the first three frames of the cut B is obtained and the 55th frame is set in the random access first frame position holding unit 802, the random access execution unit 803 stores the digital video data while the 14th frame is being reproduced. The unit 801 performs random access once, and the continuous transfer execution unit 805 attempts to transfer three consecutive frames from the 55th frame to the 57th frame to the ring buffer 806. However, since the transfer of three frames is not in time during the reproduction time of less than three frames, there is a time interval from the reproduction of the fourteenth frame to the reproduction of the fifty-fifth frame.
Continuous playback cannot be performed.

In a conventional video editing apparatus, in order to guarantee continuous playback, a cut must have a length that is a natural number times the number of frames in a playback cycle, as in the example of FIG. Since the length of the cut cannot be set arbitrarily in units of one frame, free editing becomes difficult.

In view of the foregoing, it is an object of the present invention to provide a video editing apparatus which can take one frame as long as a cut length is longer than a certain length.

[0017]

According to a first video editing apparatus of the present invention, each frame continuous as a moving image of a digital video is stored in its continuous area. A random access first frame position holding unit that holds a first frame position at the time of random access to the digital video storage unit; and a frame position in the digital video storage unit that is held by the random access first frame position holding unit. A random access execution unit that executes random access, a continuous transfer frame number holding unit that holds the number of continuous transfer frames of digital video, and a frame position in the digital video storage unit that is accessed by the random access execution unit, Frames stored in the continuous transfer frame number storage A continuous transfer execution unit for continuously transferring digital video images of the same number of frames, and a random access execution unit that once stores the digital video memory unit by the random access execution unit while reproducing the digital video images of the number of frames with a certain number of frames. If the number of frames that satisfy the condition for accessing and transferring the number of continuous frames obtained by subtracting 1 from twice the number of frames by the continuous transfer execution unit is referred to as the number of reproduction cycle frames, four times the number of reproduction cycle frames And a ring buffer that is a cyclic FIFO that temporarily holds digital images continuously transferred from the continuous transfer execution unit, and a digital image output from the ring buffer. A video display section to be displayed; A cut editing information holding unit that holds a cut that is a small area having a continuous number of frames and the order in which the cuts are connected; The number of untransferred frames in the cut that holds the number of frames, the counter of the number of remaining frames in the ring buffer that holds the number of unplayed frames held in the ring buffer, and the first number of frames held in the cut edit information holding unit. A random access initialization unit that sets the start frame position of the cut in the random access start frame position holding unit, and while the digital video of the number of playback cycle frames in the ring buffer is transferred to the video display unit, The reproduction cycle frame number is set in the continuous transfer frame number holding unit, and the random access execution unit One random access and one continuous transfer of digital video from the digital video storage unit to the ring buffer by the continuous transfer execution unit are executed. A normal transfer control unit that updates a value to a value obtained by adding the number of reproduction cycle frames to a current value, and a state in which digital video of the number of reproduction cycle frames in the ring buffer is transferred to the video display unit. Setting the number of frames held in the untransferred-frame-in-cut counter in the continuous-transfer-frame-number holding unit, and performing one random access by the random access execution unit and storing the digital video by the continuous transfer execution unit. Unit to perform one digital video continuous transfer to the ring buffer. A cut end transfer control unit for setting the start frame position in the random access start frame position holding unit, if any, of the cut following the currently reproduced cut held in the cut editing information holding unit, if any. While the digital video of the number of reproduction cycle frames in the ring buffer is transferred to the video display unit, random access, a buffer remaining multiple transfer control unit that does not perform continuous transfer from the digital video storage unit, , The number of frames held in the remaining frame number counter in the ring buffer is two times the number of frames in the reproduction cycle.
When the number is less than twice, and when the number of frames held in the untransferred frame number in cut counter is more than twice the number of frames in the reproduction cycle, the normal transfer control unit is started, and When the number of frames held in the frame number counter is less than twice the number of frames in the playback cycle, and when the number of frames held in the counter of untransferred frames in cut is less than twice the number of frames in the playback cycle. In some cases, the transfer control unit at the end of cut is started, and when the number of frames held in the remaining frame number counter in the ring buffer is equal to or more than twice the number of frames in the reproduction cycle, the transfer control unit when the buffer is too many. And a transfer control selecting section for activating the program.

A second video editing apparatus according to the present invention stores partial frames constituting each continuous frame as a moving image of a digital video in its continuous area, and stores a plurality of randomly accessible partial digital video storage units. A random access head frame position holding unit that holds each head frame position at the time of random access to the partial digital video storage unit, and the partial digital video storage held by the random access head frame position holding unit A random access unit for performing random access to a frame position in the unit, a random access execution unit existing for each of the partial digital video storage units, a continuous transfer frame number holding unit for holding a continuous transfer frame number of digital video, and the random access execution unit. The partial digital video record accessed by the section From the frame position in the unit, continuously transfer the number of partial frames held in the continuous transfer frame number holding unit, a continuous transfer execution unit existing for each of the partial digital video storage units, and a certain number of frames, While the continuous digital video of the number of frames is being reproduced, the partial digital video storage unit is randomly accessed once by the random access execution unit, and the continuous transfer execution unit subtracts 1 from twice the number of frames. When the number of frames satisfying the condition for transferring the number of continuous partial frames is referred to as the number of reproduction cycle frames, the number of partial frames obtained by subtracting 2 from four times the number of reproduction cycle frames can be held. This is a cyclic FIFO that temporarily holds digital video that is continuously transferred, and is provided for each partial digital video storage unit. A ring buffer, a digital video assembler for creating a digital video by constructing a frame from partial frames output from all of the ring buffers, and a video display for displaying the digital video output from the digital video assembler A cut editing information holding unit that holds a cut that is a continuous small area having a number of frames equal to or more than the number of frames of the reproduction cycle in the partial digital video storage unit and an order in which the cuts are connected; and the cut editing information holding unit. And an untransferred frame number counter in the cut that holds the number of untransferred frames in the cut that are currently being played and that are currently being played, and the remaining frames in the ring buffer that hold the number of unplayed frames that are held in the ring buffer. A number counter and a first cut held in the cut edit information holding unit. A random access initialization unit for setting the start frame position of the random access start frame position holding unit, and the digital video of the number of reproduction cycle frames in the ring buffer is transferred to the video assembling unit. The number of frames of the reproduction cycle is set in a transfer frame number holding unit, and one random access by the random access execution unit and one digital video from the partial digital video storage unit to the ring buffer by the continuous transfer execution unit. Execute continuous transfer, and after the end of continuous transfer,
A normal transfer control unit for updating a value in the random access head frame position holding unit to a value obtained by adding the number of reproduction cycle frames to a current value, and a digital image of the number of reproduction cycle frames in the ring buffer While the image is transferred to the video assembling unit, the number of frames held in the untransferred frame number in cut counter is set in the continuous transfer frame number holding unit, and one random access by the random access execution unit is performed. One continuous digital video transfer from the partial digital video storage unit to the ring buffer is performed by the continuous transfer execution unit, and after the continuous transfer is completed, the currently reproduced video data held in the cut edit information storage unit is reproduced. Holds the top frame position of the random access start frame if there is a cut following the cut, if any A transfer control unit at the end of cutting, which performs setting of the random access and a continuous access from the digital video storage unit while the digital video of the number of reproduction cycle frames in the ring buffer is transferred to the video assembling unit. A buffer remaining time transfer control unit that does not perform transfer, and the number of frames held in the ring buffer remaining frame number counter is less than twice the number of reproduction cycle frames, and the number of untransferred frames in the cut. When the number of frames held in the counter is equal to or more than twice the number of frames of the reproduction cycle, the normal transfer control unit is activated, and the number of frames held in the counter of the number of remaining frames in the ring buffer is equal to the number of frames of the reproduction cycle. And the number of frames held in the untransferred frame count in cut counter is less than twice the reproduction cycle number. Is less than 2 times the over arm number, activating the cut end transfer control unit,
When the number of frames held in the ring buffer remaining frame counter is equal to or more than twice the number of frames in the reproduction cycle, a transfer control selection unit that starts the buffer multi-time transfer control unit is provided. .

A third video editing apparatus according to the present invention stores each continuous frame as a moving image of a digital video in a continuous area thereof, and stores a digital video storage that can be accessed at random and a random access to the digital video storage. A random access start frame position holding unit that holds a start frame position at the time of access; and a random access unit that performs random access to a frame position in the digital video storage unit that is held by the random access start frame position holding unit. An access execution unit, a continuous transfer frame number holding unit for holding a continuous transfer frame number of digital video, and the continuous transfer frame number storage unit based on a frame position in the digital video storage unit accessed by the random access execution unit Of the number of frames held in the When placing a continuous transfer execution unit for continuously transferring the image, and there are two or more numbers playback channels natural numbers,
At a certain number of frames, while the continuous digital video of the number of frames is being reproduced, the digital video storage unit is randomly accessed the number of reproduction channels by the random access execution unit, and the number of frames is continuously accessed by the continuous transfer execution unit. When the number of frames that satisfies the condition that the number of consecutive frames obtained by subtracting 1 from twice the number of times that can be transferred several times of the reproduction channel is referred to as the number of reproduction cycle frames, the number of frames obtained by subtracting 2 from four times the number of reproduction cycle frames Is a cyclic FIFO that temporarily holds digital images continuously transferred from the continuous transfer execution unit, and stores a ring buffer having several reproduction channels and a digital image output from the ring buffer. A video display unit for displaying and displaying the reproduction channels, and a digital video storage unit. The cut is a continuous small area of the number of frames equal to or more than the reproduction cycle frame number, and the order in which the cuts are connected is held. Holding the number of untransferred frames in the cut that is currently being played back, the number of untransferred frames in the cut having the same number of playback channels, and the number of unplayed frames held in the ring buffer, Setting the remaining frame number counter in the ring buffer having the number of the reproduction channels and the first frame position of the first cut held in the cut edit information holding unit in the random access first frame position holding unit; A random access initialization unit, and a digital number of the reproduction cycle frame number in the ring buffer. While the image is transferred to the video display unit, the number of reproduction cycle frames is set in the continuous transfer frame number holding unit, and one random access by the random access execution unit and the digital transmission by the continuous transfer execution unit are performed. A single digital video continuous transfer from the video storage unit to the ring buffer is executed, and after the continuous transfer is completed, the value in the random access head frame position holding unit is a value obtained by adding the number of reproduction cycle frames to the current value. And the normal transfer control unit having the number of the reproduction channels, and the continuous transfer frame number holding while the digital video of the reproduction cycle frame number in the ring buffer is transferred to the video display unit. Set the number of frames held in the untransferred frame number counter in cut in the Times from the digital video storage unit to the ring buffer by the random access and the continuous transfer execution unit.
Times after the continuous transfer is completed, and after the continuous transfer, if there is a cut following the currently reproduced cut held in the cut editing information holding unit, if any, the head frame position is set to the random access head. Performing the setting in the frame position holding unit, the transfer control unit at the end of the cut having the number of reproduction channels, and while the digital video of the number of reproduction cycle frames in the ring buffer is transferred to the video display unit, The random access, the continuous transfer from the digital video storage unit is not performed, the buffer remaining multiple transfer control unit having the number of reproduction channels, and the number of frames held in the ring buffer remaining frame counter is the reproduction cycle frame. Number of frames that are less than twice the number and are held in the untransferred frame number counter in cut The normal transfer control unit is activated when the number of frames in the reproduction cycle is twice or more, and when the number of frames held in the remaining frame number counter in the ring buffer is less than twice the number of frames in the reproduction cycle. And, when the number of frames held in the untransferred frame number counter in the cut is less than twice the number of frames in the reproduction cycle, the transfer control unit at the end of the cut is started, and the number of remaining frames in the ring buffer is counted. When the number of held frames is equal to or more than twice the number of frames in the reproduction cycle,
Activating the buffer remaining time transfer control unit, the transfer control selection unit having a number of the reproduction channels, and the digital video of the reproduction cycle frame number in the ring buffer is transferred to the video display unit, The cut editing information holding unit, the random access initialization unit, the ring buffer, the video display unit, the untransferred frame number counter in the cut, the remaining frame number counter in the ring buffer, and the normal transfer of several reproduction channels It is characterized by comprising a time-division transfer switching unit for switching a set consisting of a control unit, the transfer control unit at the end of cutting, and the transfer control unit for remaining buffers in a time-division manner.

In a fourth video editing apparatus according to the present invention, a plurality of partial digital video storage units which are randomly accessible and store partial frames constituting each continuous frame as a moving image of a digital video are stored in the continuous area. A random access head frame position holding unit that holds a head frame position when the partial digital video storage unit is randomly accessed, and the partial digital video storage unit that is held in the random access head frame position holding unit A random access to a frame position in the memory, a random access execution unit existing for each of the partial digital video storage units, a continuous transfer frame number holding unit for holding a continuous transfer frame number of digital video, and the random access execution unit Partial digital video storage accessed by From the middle frame position, the digital video of the number of frames held in the continuous transfer frame number holding unit is continuously transferred, and a continuous transfer execution unit existing for each of the partial digital video storage units and a natural number of 2 or more are stored. When setting the number of reproduction channels, while reproducing a continuous digital image of the number of frames at a certain number of frames,
The random access execution section randomly accesses the partial digital video storage section several times by the reproduction channel, and the continuous transfer execution section repeats the number of consecutive partial frames obtained by subtracting 1 from twice the number of frames by the number of reproduction channels. If the number of frames satisfying the condition that can be transferred is referred to as the number of frames of the reproduction cycle, the number of frames of the reproduction cycle of 4
It is a cyclic FIFO that can hold partial frames of the number of frames obtained by subtracting 2 from twice, and temporarily holds digital video images continuously transferred from the continuous transfer execution unit. The number of partial digital video storage units is set to the number of reproduction channels. A digital video assembler having a multiplied number of ring buffers, a digital video created by constructing a frame from partial frames output from the several partial digital video storage units, and A digital video output from the digital video assembling unit is displayed, and the video display unit includes a number of the reproduction channels and a continuous small area having a frame number equal to or more than the reproduction cycle frame number in the partial digital video storage unit. The order of connecting the cuts and the cuts is maintained, and several A cut editing information holding unit, which holds the number of untransferred frames in the cut currently being played and held in the cut editing information holding unit, and the number of untransferred frames in the cut having the number of the reproduction channels; The number of unplayed frames held in the ring buffer is held, the number of remaining frames in the ring buffer having the number of playback channels, and the start frame position of the first cut held in the cut edit information holding unit are stored. Set in the random access head frame position holding unit, the random access initialization unit having the number of reproduction channels, and while the partial frames of the reproduction cycle frame number in the ring buffer are transferred to the video assembling unit, The reproduction cycle frame number is set in the continuous transfer frame number holding unit,
One random access by the random access execution unit and one continuous transfer of partial frames from the partial digital video storage unit to the ring buffer by the continuous transfer execution unit are executed. The value in the frame position holding unit is updated to a value obtained by adding the number of the reproduction cycle frames to the current value, the normal transfer control unit having the number of the reproduction channels, and the number of the reproduction cycle frames in the ring buffer. While the partial frames are transferred to the video display unit, the number of frames held in the untransferred frame number in cut counter is set in the continuous transfer frame number holding unit, and one time by the random access execution unit is set. From the partial digital video storage unit to the ring buffer by the random access and the continuous transfer execution unit One continuous transfer of partial frames is executed. After the continuous transfer is completed, the start frame position of the next cut, if any, following the currently reproduced cut held in the cut editing information holding unit, if any, is set to the random access. The setting is performed in the first frame position holding unit, and the transfer control unit at the end of cut having the number of the reproduction channels and the digital image of the number of the reproduction cycle frames in the ring buffer are transferred to the image assembling unit. Random access, not performing continuous transfer from the partial digital video storage unit, the buffer remaining multiple transfer control unit having several reproduction channels, and the number of frames held in the ring buffer remaining frame number counter is used for the reproduction. When the frame number is less than twice the number of periodic frames and the frame held in the When the number of frames is equal to or more than twice the number of frames of the reproduction cycle, the normal transfer control unit is started, and the number of frames held in the remaining frame number counter in the ring buffer is less than twice the number of frames of the reproduction cycle. At some point, if the number of frames held in the untransferred frame number counter within cut is less than twice the number of frames in the reproduction cycle, the cut end transfer control unit is activated and the remaining frames in the ring buffer are activated. When the number of frames held in the number counter is equal to or more than twice the number of frames in the reproduction cycle, the buffer remaining multi-time transfer control unit is activated, and the transfer control selection unit having the number of reproduction channels and the ring buffer While the digital video of the number of frames of the reproduction cycle is transferred to the video assembling unit,
The number of the reproduction channels, the cut editing information holding unit
The random access initialization unit, the partial digital video storage unit, several ring buffers, the video assembly unit,
When a group consisting of the video display unit, the untransferred frame number counter in the cut, the remaining frame number counter in the ring buffer, the normal transfer control unit, the transfer control unit at the end of the cut, and the transfer control unit at the time of buffer remaining is set. It is characterized by comprising a time-division transfer switching unit that switches by division.

[0021]

In the first video editing apparatus of the present invention, the digital video storage unit is randomly accessed once by the random access execution unit while the continuous digital video of the number of frames is reproduced with a certain number of frames. When the number of frames that satisfies the condition that the continuous transfer execution unit can transfer the number of continuous frames obtained by subtracting 1 from twice the number of frames is named a reproduction cycle frame number, first, the random access initialization unit sets the cut editing information The head frame position of the first cut held in the holding unit is set in the random access head frame position holding unit.

Thereafter, the number of frames held in the ring buffer remaining frame counter is less than twice the number of frames in the playback cycle, and the number of frames held in the untransferred frame number in cut counter is the number of frames in the playback cycle. If it is twice or more, the transfer control selection unit activates the normal transfer control unit, and if the number of frames held in the uncut untransferred frame counter is more than twice the number of frames in the reproduction cycle, the transfer control When the selection unit activates the transfer control unit at the end of cutting, and the number of frames held in the remaining frame number counter in the ring buffer is equal to or more than twice the number of frames in the reproduction cycle, the transfer control selection unit sets the transfer control when the buffer is full. By repeatedly starting the units, continuous transfer from the digital video storage unit to the ring buffer and continuous retransmission from the ring buffer to the video display unit are performed. It is carried out.

In the second video editing apparatus according to the present invention, the random access execution unit accesses the partial digital video storage unit once by random access while reproducing the continuous digital video of the number of frames with a certain number of frames. When the number of frames that satisfies the condition that the continuous transfer execution unit can transfer the number of consecutive partial frames obtained by subtracting 1 from twice the number of frames is referred to as the number of reproduction cycle frames, first, the random access initialization unit performs cut editing. The start frame position of the first cut held in the information holding unit is set in the random access start frame position holding unit.

Thereafter, the number of frames held in the ring buffer remaining frame counter is less than twice the number of frames in the reproduction cycle, and the number of frames held in the counter of untransferred frames in cut is the number of frames in the reproduction cycle. If it is twice or more, the transfer control selection unit activates the normal transfer control unit, and if the number of frames held in the uncut untransferred frame counter is more than twice the number of frames in the reproduction cycle, the transfer control When the selection unit activates the transfer control unit at the end of cutting, and the number of frames held in the remaining frame number counter in the ring buffer is equal to or more than twice the number of frames in the reproduction cycle, the transfer control selection unit sets the transfer control when the buffer is full. Repeatedly activating the unit, the continuous transfer from the partial digital video storage unit to the ring buffer, and the digital video assembly unit from the ring buffer Continuous playback of the video display unit is performed Te.

In the third video editing apparatus of the present invention, when a certain natural number of 2 or more is set as the number of reproduction channels, the digital video is reproduced while the continuous digital video of the number of frames is reproduced at a certain number of frames. The storage unit is randomly accessed several times by the reproduction channel by the random access execution unit, and the continuous transfer execution unit satisfies a condition that the number of continuous frames obtained by subtracting 1 from twice the number of frames can be transferred several times by the reproduction channel. The number of frames is referred to as a reproduction cycle frame number.

The time-division transfer switching unit has a number of reproduction channels, a cut edit information holding unit, a random access initialization unit, a ring buffer, a video display unit, a counter of untransferred frames in cut, a counter of remaining frames in ring buffer, A group consisting of a normal transfer control unit, a transfer control unit at the end of cutting, and a transfer control unit for remaining buffers is switched in a time-division manner.

Looking at a certain channel, first, the random access initialization unit corresponding to the channel sets the start frame position of the first cut held in the cut edit information holding unit corresponding to the channel to the channel. Set in the random access start frame position holding unit.

Thereafter, the number of frames held in the remaining frame number counter in the ring buffer corresponding to the channel is less than twice the number of frames in the reproduction cycle, and the number of frames held in the uncut untransferred frame counter corresponding to the channel is held. If the number of frames to be transmitted is equal to or more than twice the number of frames in the reproduction cycle, the transfer control selection unit corresponding to the channel activates the normal transfer control unit corresponding to the channel, and the untransferred cut within the cut corresponding to the channel. If the number of frames held in the frame number counter is equal to or more than twice the number of frames in the reproduction cycle, the transfer control selection unit corresponding to the channel activates the cut end transfer control unit corresponding to the channel, and If the number of frames held in the remaining frame counter in the ring buffer corresponding to In this case, the transfer control selecting section corresponding to the channel repeatedly activates the buffer remaining time transfer control section corresponding to the channel, thereby continuously transferring data from the digital video storage section to the ring buffer and transferring video from the ring buffer. Continuous reproduction on the display unit is performed simultaneously for several reproduction channels.

In the fourth video editing apparatus according to the present invention, when a certain natural number of 2 or more is set as the number of reproduction channels, while a continuous digital image of the number of frames is reproduced at a certain number of frames, the partial digital image is reproduced. The storage unit randomly accesses the reproduction channel several times by the random access execution unit, and satisfies the condition that the continuous transfer execution unit can transfer the continuous partial frames of the number obtained by subtracting 1 from twice the number of frames by the reproduction channel several times. When the number of frames is referred to as the number of frames of the reproduction cycle, the time division transfer switching unit has a number of reproduction channels, a cut edit information holding unit, a random access initialization unit, a partial digital video storage unit, a ring buffer, a video assembly unit, and a video. Display unit, untransferred frame counter in cut, remaining frame counter in ring buffer, normal transfer control unit It switched in a time division set of from the transfer control unit when during the transfer controller buffer Nokorio cut ends.

Looking at a certain channel, first, the random access initialization unit corresponding to the channel sets the start frame position of the first cut held in the cut edit information holding unit corresponding to the channel to the channel. Set in the random access start frame position holding unit.

Thereafter, the number of frames held in the ring buffer remaining frame counter corresponding to the channel is less than twice the number of frames in the reproduction cycle, and the number of frames held in the cut untransferred frame counter corresponding to the channel is held. If the number of frames to be transmitted is equal to or more than twice the number of frames in the reproduction cycle, the transfer control selection unit corresponding to the channel activates the normal transfer control unit corresponding to the channel, and the untransferred cut within the cut corresponding to the channel. If the number of frames held in the frame number counter is equal to or more than twice the number of frames in the reproduction cycle, the transfer control selection unit corresponding to the channel activates the cut end transfer control unit corresponding to the channel, and If the number of frames held in the remaining frame counter in the ring buffer corresponding to In this case, the transfer control selecting section corresponding to the channel repeatedly activates the buffer remaining time transfer control section corresponding to the channel, so that continuous transfer from the partial digital video storage section to the corresponding ring buffer can be performed. Continuous playback from the ring buffer to the video display unit corresponding to the channel via the digital video assembly unit corresponding to the channel is performed simultaneously for several playback channels.

[0032]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a video editing apparatus according to a first embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram of a video editing apparatus according to a first embodiment of the present invention.

In FIG. 1, reference numeral 101 denotes a digital video storage unit implemented by a hard disk; 102, a random access head frame position holding unit; 103, a random access execution unit; 104, a continuous transfer frame number holding unit;
5 is a continuous transfer execution unit, 106 is a ring buffer, 107
Is a video display unit, 108 is a cut edit information holding unit, 109
Is a counter of the number of untransferred frames in the cut, 110 is a counter of the number of remaining frames in the ring buffer, 111 is a random access initialization unit, 112 is a normal transfer control unit, 113 is a transfer control unit at the end of cut, and 114 is a transfer when the buffer is full. The control unit 115 is a transfer control selection unit.

The operation of the video editing apparatus according to the first embodiment of the present invention will be described with reference to FIG. First, a digital video storage unit 10 that can be randomly accessed so that each continuous frame as a moving image of a digital video becomes its continuous area.
1 is stored. For example, it is assumed that digital video for a total of 30 seconds from the first frame to the 900th frame of the NTSC signal having a reproduction speed of 30 frames per second is stored. The digital video storage unit 101 has a performance of about 34 milliseconds for the random access and a data transfer speed of about 2.2 MB / sec, and expresses the data amount of one NTSC frame at 30 KB. And

By the way, the reproduction time of 4 frames is 4/3.
0 = 0.13 seconds. In this embodiment, the time required for one random access and the continuous transfer of 4 * 2-1 = 7 frames is 0.127 seconds, which is shorter than the 4-frame reproduction time. Meet.

Since the number of frames in the reproduction cycle is 4, the ring buffer 106 has a size of 14 * 30 = 420 KB for holding 4 * 4-2 = 14 frames. Now, it is assumed that the cut editing information shown in FIG.

First, the random access initializing unit 111 sets the first eleventh frame of the cut A in the random access head frame position holding unit 102. The value of the number-of-untransferred-frames-in-cut counter 109 is 4 of the total number of frames in the cut A, and the remaining frame number counter 110 in the ring buffer is
Is 0. Since the value of the ring buffer remaining frame number counter 110 is less than 4 * 2 = 8 frames and the value of the untransferred frame number in cut counter 109 is less than 4 * 2 = 8 frames, the transfer control selecting unit 115 ends the cut. The time transfer control unit 113 is selected.

The transfer control unit 113 at the end of the cut sets the value 4 of the untransferred frame in cut counter 109 to 4 in the continuous transfer frame number holding unit 104. As a result, the 11th frame of the digital video storage unit 101 is stored. The random access execution unit 103 accesses and the continuous transfer execution unit 1
05 transfers the 11th to 14th frames to the ring buffer 106. Then, the cut end transfer control unit 113 sets the first 21st frame of the next cut B in the random access start frame position holding unit 102.

Next, the value of the remaining frame number counter 110 in the ring buffer is less than 4 frames and less than 8 frames, and the value of the untransferred frame number in cut counter 109 is 11 frames and 8 frames or more. 11
5 selects the normal transfer control unit 112. Since the normal transfer control unit 112 sets the number of reproduction cycle frames to 4 in the continuous transfer frame number holding unit 104, the ring buffer 106
While the eleventh to fourteenth frames are reproduced on the video display unit 107, the digital video storage unit 10
One random access execution unit 103 accesses the 21st frame, and the continuous transfer execution unit 105 transfers the 21st to 24th frames to the ring buffer 106. Then, the normal transfer control unit 112 sets the next 25th frame in the random access head frame position holding unit 102.

Next, the value of the remaining frame number counter 110 in the ring buffer is less than 4 frames and less than 8 frames, and the value of the untransferred frame number in cut counter 109 is less than 7 frames and 8 frames. 115
Selects the transfer control unit 113 at the end of cutting. When the cut is completed, the transfer control unit 113 sets the continuous transfer frame number holding unit 1
Since the value of the untransferred-in-cut-frames counter 109 is set to 7 in 04, the 21st to 24th frames from the ring buffer 106 are reproduced on the video display unit 107 while the digital video storage unit 101 The random access execution unit 103 accesses 25 frames,
The continuous transfer execution unit 105 transfers the 25th frame to the 31st frame to the ring buffer 106. Then, the cut end transfer control unit 113 sets the 41st frame which is the head of the next cut C in the random access head frame position holding unit 102.

Next, the value of the remaining frame number counter 110 in the ring buffer is less than 7 frames and 8 frames, and the value of the untransferred frame number in cut counter 109 is less than 7 frames and 8 frames. 115
Selects the transfer control unit 113 at the end of cutting. When the cut is completed, the transfer control unit 113 sets the continuous transfer frame number holding unit 1
Since the value of the value of the untransferred-in-cut-frames counter 109 is set to 7 in 04, while the 25th to 28th frames are reproduced on the video display unit 107 from the ring buffer 106, the digital video memory unit 101 The random access execution unit 103 accesses 41 frames,
The continuous transfer execution unit 105 transfers the 41st to 47th frames to the ring buffer 106. Then, the cut end transfer control unit 113 sets the 55th frame which is the head of the next cut D in the random access head frame position holding unit 102.

Next, since the value of the remaining frame number counter 110 in the ring buffer is equal to or more than 10 frames and 8 frames, the transfer control selecting unit 115 selects the transfer control unit 114 when the buffer is too many. While the 29th frame to the 31st frame and the 41st frame are reproduced on the video display unit 107 from the ring buffer 106, the remaining buffer transfer control unit 114 does not execute random access and continuous transfer.

Next, since the value of the ring buffer remaining frame number counter 110 is less than 6 frames and less than 8 frames, and the value of the untransferred frame number in cut counter 109 is less than 6 frames and less than 8 frames, the transfer control selector 115
Selects the transfer control unit 113 at the end of cutting. When the cut is completed, the transfer control unit 113 sets the continuous transfer frame number holding unit 1
Since the value of the untransferred-in-cut-frames counter 109 is set to 6 in 04, the 42th to 45th frames from the ring buffer 106 are played back on the video display unit 107 while the first video of the digital video storage unit 101 is read. The random access execution unit 103 accesses 55 frames,
The continuous transfer execution unit 105 transfers the 55th to 60th frames to the ring buffer 106. Since there is no next cut, the transfer control unit 113 at the end of the cut does not set anything in the random access first frame position holding unit 102.

Thereafter, the 46th and 47th frames and the 55th to 58th frames from the ring buffer 106 are reproduced on the video display unit 107.

As described above, in the first embodiment of the present invention, it is possible to continuously reproduce cut edit information composed of cuts having an arbitrary length of 4 frames or more as shown in FIG.

Hereinafter, a video editing apparatus according to a second embodiment of the present invention will be described with reference to the drawings. FIG. 2 is a block diagram of a second embodiment of the video editing apparatus according to the present invention.

In FIG. 2, reference numeral 201 denotes a partial digital video storage unit implemented by two hard disks, 202 denotes a random access start frame position holding unit, 203 denotes a random access execution unit, 204 denotes a continuous transfer frame number holding unit, and 205 denotes a continuous transfer frame number holding unit. A continuous transfer execution unit, 206 is a ring buffer, 207 is a digital video assembling unit, 208 is a video display unit, 209 is a cut edit information holding unit, 210 is a counter of untransferred frames in cut, and 211 is a counter of remaining frames in ring buffer. , 212 a random access initialization unit, 213 a normal transfer control unit, 214 a cut end transfer control unit, 215 a buffer remaining multi-time transfer control unit, 21
Reference numeral 6 denotes a transfer control selection unit.

The operation of the second embodiment of the video editing apparatus according to the present invention will be described with reference to FIG. Each frame is decomposed into two divided partial frames, and stored in the partial digital video storage unit 201 which can be randomly accessed so that the partial frames corresponding to each continuous frame as a moving image of the digital video become the continuous area. . For example, 3 per second
It is assumed that each of the partial digital video storage units 201 stores a partial digital video obtained by bisecting the digital video for 30 seconds from the first frame to the 900th frame of the NTSC signal having a reproduction speed of 0 frame.

The digital video storage unit 201 has a random access time of about 34 milliseconds and a data transfer rate of about 1.1 MB, which is lower than that used in the first embodiment.
/ S performance per second. Assuming that the data amount of one frame of NTSC is represented by 30 KB, the partial frame in each partial digital video storage unit 201 is 1 KB.
5 KB.

By the way, the reproduction time of 4 frames is 4/3.
0 = 0.13 seconds. In the present embodiment, the time required to perform random access once and continuously transfer 4 * 2-1 = 7 partial frames is 0.127 seconds, which is shorter than the 4-frame reproduction time. To meet the conditions.

Since the number of frames in the reproduction cycle is 4, the two ring buffers 206 each have a size of 14 * 15 = 210 KB enough to hold 4 * 4-2 = 14 partial frames. Now, in the cut edit information holding unit 209, FIG.
It is assumed that the cut editing information shown in FIG.

First, the random access initializing unit 212 sets the first eleventh frame of the cut A in the random access head frame position holding unit 202. The value of the untransferred frame number in cut counter 210 is 4 of the total number of frames in the cut A, and the remaining frame number counter 211 in the ring buffer is 211.
Is 0. Since the value of the ring buffer remaining frame counter 211 is less than 4 * 2 = 8 frames, and the value of the untransferred frame number in cut counter 210 is less than 4 * 2 = 8 frames, the transfer control selection unit 216 ends the cut. The time transfer control unit 214 is selected.

The transfer control unit 214 at the end of the cut sets the value of the untransferred-in-cut-in-cut counter 210 to 4 in the continuous transfer frame number holding unit 204. The random access execution unit 203 accesses the frame, and the continuous transfer execution unit 205 transfers the 11th to 14th partial frames to the ring buffer 206. Then, the transfer control unit 214 at the end of the cut stores the 21st of the head of the next cut B in the random access head frame position holding unit 202.
Set the frame.

Next, the value of the remaining frame number counter 211 in the ring buffer is less than 4 and 8 frames, and the value of the untransferred frame number in cut counter 210 is 11 frames and 8 frames or more. 21
6 selects the normal transfer control unit 213. Since the normal transfer control unit 213 sets the number of reproduction cycle frames to 4 in the continuous transfer frame number holding unit 204, the 11th to 14th partial frames from the two ring buffers 206 are transferred to the digital video assembling unit 207. And the random access execution unit 203 accesses the 21st partial frame of the partial digital video storage unit 201 while the frame is reproduced on the video display unit 208. Up to 24 partial frames are transferred to the ring buffer 206. Then, the normal transfer control unit 213 sets the next 25th frame in the random access head frame position holding unit 202.

Next, since the value of the remaining frame number counter 211 in the ring buffer is less than 4 frames and 8 frames and the value of the untransferred frame number in cut counter 210 is less than 7 frames and 8 frames, the transfer control selector 216
Selects the transfer control unit 214 at the end of cutting. The transfer control unit 214 at the time of cutting end includes the continuous transfer frame number holding unit 2
Since the value of the untransferred-in-cut-frames counter 210 value of 7 is set to 04, the 21st to 24th partial frames from the ring buffer 206 are transferred to the digital video assembling unit 207 and synthesized into a frame to be displayed on the video display unit. During the reproduction to the 208, the random access execution unit 203 accesses the 25th partial frame of the partial digital video storage unit 201, and the continuous transfer execution unit 205
The partial frame to the 31st partial frame are transferred to the ring buffer 206. Then, the transfer control unit 214 at the end of the cut makes the random access head frame position holding unit
The 2nd frame, which is the head of the next cut C, is set to 2.

Next, since the value of the remaining frame number counter 211 in the ring buffer is less than 7 and 8 frames and the value of the untransferred frame number in cut counter 210 is less than 7 and 8 frames, the transfer control selector 216
Selects the transfer control unit 214 at the end of cutting. The transfer control unit 214 at the time of cutting end includes the continuous transfer frame number holding unit 2
Since the value of the value of the untransferred-in-cut-frames counter 210 is set to 7 in 04, the 25th to 28th partial frames from the ring buffer 206 are transferred to the digital video assembling unit 207 and synthesized into a frame to be displayed on the video display unit. During the reproduction to the digital video storage unit 208,
01 random frame execution unit 2
03 accesses, and the continuous transfer execution unit 205 transfers the 41st to 47th partial frames to the ring buffer 206. Then, the transfer control unit 21 at the end of cutting
No. 4 sets the 55th frame which is the head of the next cut D in the random access head frame position holding unit 202.

Next, since the value of the counter 211 for the number of remaining frames in the ring buffer is equal to or more than 10 frames and 8 frames, the transfer control selecting unit 216 selects the transfer control unit 215 when the buffer is too many. While the 29th partial frame to the 31st partial frame and the 41st partial frame are transferred from the ring buffer 206 to the digital video assembling unit 207 and combined with the frame to be reproduced on the video display unit 208, the buffer remaining multiple transfer control is performed. The unit 216 does not execute random access and continuous transfer.

Next, the value of the remaining frame number counter 211 in the ring buffer is less than 6 frames and less than 8 frames, and the value of the untransferred frame number in cut counter 210 is less than 6 frames and less than 8 frames. 216
Selects the transfer control unit 214 at the end of cutting. The transfer control unit 214 at the time of cutting end includes the continuous transfer frame number holding unit 2
Since the value of the value of the untransferred-in-cut-frames counter 210, which is 6, is set to 04, the 42nd to 45th partial frames are transferred from the ring buffer 206 to the digital video assembling unit 207 and synthesized into a frame to be displayed on the video display unit. During the reproduction to the digital video memory 208,
01: The 55th partial frame of the random access execution unit 2
03 accesses, and the continuous transfer execution unit 205 transfers the 55th partial frame to the 58th partial frame to the ring buffer 206. Since there is no next cut, the transfer control unit 214 at the end of the cut does not set anything in the random access first frame position holding unit 202.

Thereafter, the 46th and 47th partial frames from the ring buffer 206 and the 55th to 60th partial frames from the 55th partial frame are stored in the digital video assembling section 207.
And is synthesized into a frame and reproduced on the video display unit 208.

As described above, in the first embodiment of the present invention, as shown in FIG. 5, cut editing information consisting of cuts having an arbitrary length of 4 frames or more is transferred to a hard disk having a lower transfer speed than the first embodiment. And so on, for continuous reproduction.

Hereinafter, a video editing apparatus according to a third embodiment of the present invention will be described with reference to the drawings. FIG. 3 is a block diagram of a third embodiment of the video editing apparatus according to the present invention.

In FIG. 3, reference numeral 301 denotes a digital video storage unit implemented by a hard disk; 302, a random access head frame position holding unit; 303, a random access execution unit; 304, a continuous transfer frame number holding unit;
5 is a continuous transfer execution unit, 306 is a ring buffer of the first channel, 307 is a video display unit of the first channel, 308 is a cut editing information holding unit of the first channel, and 309 is the number of untransferred frames in the cut of the first channel Counter, 310 is a counter of the number of remaining frames in the ring buffer of the first channel, 311 is a random access initialization unit of the first channel, 312 is a normal transfer control unit of the first channel, and 313 is transfer control at the end of cutting of the first channel. Part, 314 is the first
A channel buffer remaining transfer control unit 315 is a transfer control selection unit for the first channel, and 316 is a time division transfer switching unit for switching two channels by time division.

326 is a ring buffer of the second channel,
327 is a video display unit of the second channel, 328 is a cut edit information holding unit of the second channel, 329 is a counter of the number of untransferred frames in the cut of the second channel, 330 is a counter of the number of remaining frames in the ring buffer of the second channel, 331
Is a random access initialization unit for the second channel, 332 is a normal transfer control unit for the second channel, 333 is a transfer control unit at the end of the cut for the second channel, 334 is a transfer control unit for the remaining buffer of the second channel, 335 Denotes a transfer control selection unit for the second channel.

The operation of the third embodiment of the video editing apparatus according to the present invention will be described with reference to FIG. First, the digital video storage unit 30 that can be randomly accessed so that each continuous frame as a moving image of the digital video becomes its continuous area.
1 is stored. For example, it is assumed that digital video for a total of 30 seconds from the first frame to the 900th frame of the NTSC signal having a reproduction speed of 30 frames per second is stored.

The digital video storage unit 301 has a performance in which the time required for random access is about 17 milliseconds and the data transfer rate is about 4.4 MB / sec.
It is assumed that the data amount of one frame is expressed by 30 KB.

By the way, the reproduction time of 4 frames is 4/3.
0 = 0.13 seconds. In this embodiment, the time required for performing random access twice and continuously transferring 4 * 2-1 = 7 frames twice is 0.127 seconds, which is shorter than the 4-frame reproduction time. Satisfies the condition.

Since the number of frames in the reproduction cycle is 4, the ring buffers 306 and 326 have a size of 14 * 30 = 420 KB, which holds 4 * 4-2 = 14 frames, for two channels.

Now, it is assumed that the cut edit information shown in FIG. 6 is stored in the cut edit information holding unit 308 of the first channel, and the cut edit information shown in FIG. 7 is stored in the cut edit information holding unit 328 of the second channel. . First, the time division transfer switching unit 316 switches to channel 1. The random access initialization unit 311 of the first channel performs
Frame is randomly accessed first frame position holding unit 3
Set to 02. Untransferred frames in cut counter 3
The value of 09 is 7 of the total number of frames of the cut A, and the value of the remaining frame number counter 310 in the ring buffer is 0.

Ring buffer remaining frame counter 3
Since the value of 10 is less than 4 * 2 = 8 frames and the value of the untransferred-frame-in-cut counter 309 is less than 4 * 2 = 8 frames, the transfer control selection unit 315 selects the transfer control unit 313 at the end of the cut. I do. The transfer control unit 313 at the end of the cut sets the value 7 of the untransferred-in-cut-frame counter 309 to 7 in the continuous transfer frame number holding unit 304. As a result, the 11th frame of the digital video storage unit 301 is randomly accessed. The unit 303 accesses,
The continuous transfer execution unit 305 transfers the eleventh to seventeenth frames to the ring buffer 306.

Next, the time division transfer switching section 316 switches to channel 2. The random access initialization unit 331 of the second channel sets the 121st frame at the beginning of the cut D in the random access start frame position holding unit 302. The value of the untransferred frame number in cut counter 329 is 5 of the total number of frames of the cut D, and the value of the remaining frame number counter 330 in the ring buffer is 0. The value of the remaining frame number counter 330 in the ring buffer is less than 4 * 2 = 8 frames, and the untransferred frame number counter 329 in the cut.
Is less than 4 * 2 = 8 frames, the transfer control selecting unit 335 selects the transfer control unit 333 at the end of cutting.

The transfer control unit 333 at the end of the cut sets the value of the untransferred frame number within cut counter 329 to 5 in the continuous transfer frame number holding unit 304. As a result, the 121st frame of the digital video storage unit 301 The random access execution unit 303 accesses and the continuous transfer execution unit 305 transfers the 121st to 125th frames to the ring buffer 326.

From the ring buffer 306, the eleventh to the first
While four frames are transferred to the video display unit 307, and simultaneously the 121st to 124th frames are transferred to the video display unit 327 from the ring buffer 326, the time division transfer switching unit 316 first switches to the first channel. When the cut is completed, the transfer control unit 313 sets the 21st frame, which is the first frame of the next cut B, in the random access start frame position holding unit 302.

At this time, the value of the untransferred-frame-in-cut counter 309 contains 7 of the total number of frames in the cut B, and the value of the remaining frame number in ring buffer counter 310 contains 7 of the frames in the ring buffer 306. When the value of the remaining frame number counter 310 in the ring buffer is less than 7 frames and 8 frames, the untransferred frame number in cut counter 3
Since the value of 09 is less than 7 frames and 8 frames, the transfer control selection unit 315 selects the transfer control unit 313 at the end of cutting.

The transfer control unit 313 at the end of the cut sets the value 7 of the untransferred-in-cut-in-cut counter 309 to 7 in the continuous transfer frame number holding unit 304. The unit 303 accesses and the continuous transfer execution unit 305
Ring buffer 3 from frame 1 to frame 27
06. Then, the time-division transfer switching unit 316 switches to the second channel, and the transfer control unit 333 at the time of the end of the previous cut returns to the fourteenth frame which is the first frame of the next cut E.
Five frames are set in the random access head frame position holding unit 302.

At this time, the value of the untransferred frame number in cut counter 329 is set to 8 of the total number of frames in the cut E, and the value of the remaining frame number in ring buffer counter 330 is set to 5 of the number of frames in the ring buffer 326. When the value of the remaining frame number counter 330 in the ring buffer is less than 5 and 8 frames, the untransferred frame number counter 3 in the cut
Since the value of 29 is eight frames or more than eight frames, the transfer control selection unit 335 selects the normal transfer control unit 332.

Since the normal transfer control unit 332 sets the number of reproduction cycle frames to 4 in the continuous transfer frame number holding unit 304, the random access execution unit 303 accesses the 145th frame of the digital video storage unit 301, and The execution unit 305 transfers the 145th frame to the 148th frame to the ring buffer 326.

From the ring buffer 306, the fifteenth through the first
The 7th and 21st frames are transferred to the video display unit 307, and at the same time, the 125th and 1st frames are transferred from the ring buffer 326.
While the 147th frame to the 147th frame are being transferred to the video display unit 327, the time division transfer switching unit 316 switches to the first channel, and the transfer control unit 313 at the time of the end of the previous cut.
Sets the 31st frame, which is the first frame of the next cut C, in the random access head frame position holding unit 302.

At this time, the value of the number-of-untransferred-frames-in-cut counter 309 contains 7 of the total number of frames in the cut C, and the value of the remaining-frame-counter-in-ring-buffer counter 310 contains the number of frames 10 in the ring buffer 306. The value of the ring buffer remaining frame counter 310 is 10 frames and 8
Since the number of frames is equal to or greater than the number of frames, the transfer control selection unit 315 selects the transfer control unit 314 when there is a buffer remaining. The buffer remaining transfer control unit 314 performs neither random access nor continuous transfer. Then, the time-division transfer switching unit 316 switches to the second channel, and the previous normal transfer control unit 332 sets the 149th frame following the cut E in the random access head frame position holding unit 302.

At this time, the value of the untransferred-frame-in-cut counter 329 contains the number of remaining frames 4 in the cut D, and the value of the remaining frame number in ring buffer counter 330 contains the number of frames 5 in the ring buffer 326. When the value of the remaining frame number counter 330 in the ring buffer is less than 5 and 8 frames, the untransferred frame number counter 3 in the cut
Since the value of 29 is less than 4 frames and 8 frames, the transfer control selecting unit 335 selects the transfer control unit 333 at the end of cutting. The cut end transfer control unit 333 sets the value of the untransferred in-cut frame number counter 329 to 4 in the continuous transfer frame number holding unit 304, so that the random access execution unit 303 executes the 149th frame of the digital video storage unit 301. Access, and the continuous transfer execution unit 305
The 49th to 152nd frames are transferred to the ring buffer 326.

From the ring buffer 306, the 22nd to the 2nd
While five frames are transferred to the video display unit 307 and simultaneously the 148th to 151st frames are transferred from the ring buffer 326 to the video display unit 327, the time division transfer switching unit 316 first switches to the first channel. At this time, the value of the untransferred frame count in cut counter 309 is 7 of the total number of frames of the cut C, and the value of the remaining frame number in ring buffer counter 310 is 6 of the number of frames in the ring buffer 306. When the value of the remaining frame number counter 310 in the ring buffer is less than 6 frames and 8 frames,
Since the value of the untransferred-in-cut frame number counter 309 is less than 7 frames and 8 frames, the transfer control selecting unit 31
5 selects the transfer control unit 313 at the end of cutting.

The transfer control unit 313 at the end of the cut sets the value 7 of the untransferred-in-cut frame number counter 309 to 7 in the continuous transfer frame number holding unit 304, so that the 31st frame of the digital video storage unit 301 is randomly accessed. The unit 303 accesses and the continuous transfer execution unit 305
Ring buffer 3 from frame 1 to frame 37
06. Then, the time-division transfer switching unit 316 switches to the second channel, and the transfer control unit 333 at the end of the previous cut switches the 16th frame which is the first frame of the next cut F.
One frame is set in the random access head frame position holding unit 302.

At this time, the value of the untransferred-frame-in-cut counter 329 contains 4 of the total number of frames in the cut F, and the value of the remaining frame number in ring buffer counter 330 contains 5 of the frames in the ring buffer 326. When the value of the remaining frame number counter 330 in the ring buffer is less than 5 and 8 frames, the untransferred frame number counter 3 in the cut
Since the value of 29 is less than 4 frames and 8 frames, the transfer control selecting unit 335 selects the transfer control unit 333 at the end of cutting. The cut end transfer control unit 333 sets the value of the untransferred intra-cut frame number counter 329 to 4 in the continuous transfer frame number holding unit 304, so that the random access execution unit 303 executes the 161st frame of the digital video storage unit 301. Access, and the continuous transfer execution unit 305
The 61st to 164th frames are transferred to the ring buffer 326.

Thereafter, the 26th and 27th frames from the ring buffer 306 to the video display unit 307 and the 31st to 37th frames are transmitted from the ring buffer 326 to the video display unit 327.
52 frames, the 161st frame to the 164th frame are transferred and continuously reproduced.

As described above, in the third embodiment of the present invention, two cut edit information consisting of cuts having an arbitrary length of four frames or more as shown in FIGS. Can be.

In the third embodiment, the two video display units are two independent display devices. However, the two video display units may be one special effect device for realizing a wipe or the like having two independent video inputs. Good.

Hereinafter, a video editing apparatus according to a fourth embodiment of the present invention will be described with reference to the drawings. FIG. 4 is a block diagram of a fourth embodiment of the video editing apparatus according to the present invention.

In FIG. 4, reference numeral 401 denotes a partial digital video storage unit realized by two hard disks, 402 denotes a random access head frame position holding unit, 403 denotes a random access execution unit, 404 denotes a continuous transfer frame number holding unit, and 405 denotes a continuous transfer frame number holding unit. A continuous transfer execution unit; 406, a first channel ring buffer; 407, a first channel digital video assembling unit; 408, a first channel video display unit;
Reference numeral 9 denotes a first channel cut editing information holding unit, 410 denotes a first channel untransferred frame number counter within a cut, 41
1 is a counter of the number of remaining frames in the ring buffer of the first channel, 412 is a random access initialization unit of the first channel, 413 is a normal transfer control unit of the first channel, 414 is a transfer control unit at the end of cutting of the first channel, 415 is the first
The transfer control unit 416 for the buffer remaining time of the channel is a transfer control selection unit for the first channel.

Reference numeral 417 denotes a time-division transfer switching unit for switching the two channels in a time-division manner; 426, a ring buffer of the second channel; 427, a digital video assembling unit of the second channel; Second
The channel cut editing information holding unit 430 is a counter for the number of untransferred frames within the cut of the second channel, and 431 is the second
Number of remaining frames in ring buffer of channel, 4
32 is a random access initialization unit for the second channel, 43
Reference numeral 3 denotes a second channel normal transfer control unit, 434 denotes a second channel cut end transfer control unit, 435 denotes a second channel remaining buffer transfer control unit, and 436 denotes a second channel transfer control selection unit. .

The operation of the video editing apparatus according to the fourth embodiment of the present invention will be described with reference to FIG. Each frame is decomposed into two divided partial frames, and stored in a partial digital video storage unit 401 that can be randomly accessed such that each continuous frame as a moving image of the digital video has a partial frame corresponding to the continuous frame. deep.

For example, each of the partial digital video storage units 401 stores a partial digital video obtained by bisecting the digital video of 30 seconds from the first frame to the 900th frame of the NTSC signal having a reproduction speed of 30 frames per second. And Also, the digital video storage unit 301
Means that the time required for random access is about 17 milliseconds, and the data transfer rate is about 2.2, which is slower than that used in the third embodiment.
Assume that it has a performance of MB / sec. Assuming that the data amount of one NTSC frame is represented by 30 KB, the partial frame in each partial digital video storage unit 401 is 15 KB.

Incidentally, the reproduction time of 4 frames is 4/3.
0 = 0.13 seconds. In the present embodiment, the time required for performing random access twice and continuously transferring 4 * 2-1 = 7 partial frames twice is 0.127 seconds, which is shorter than the four-frame reproduction time. Therefore, four frames are reproduced. The condition as a frame period is satisfied.

Since the number of frames in the reproduction cycle is 4, the number of ring buffers 406 and 426 having a size of 14 * 15 = 210 KB for holding 4 * 4-2 = 14 frames is two for each of two channels. 4 in total.

Now, it is assumed that the cut edit information shown in FIG. 6 is stored in the cut edit information holding unit 409 of the first channel, and the cut edit information shown in FIG. 7 is stored in the cut edit information holding unit 429 of the second channel. .

First, the time division transfer switching section 417 switches to channel 1. The first channel random access initialization unit 412 sets the first eleventh frame of the cut A in the random access head frame position holding unit 402. The value of the untransferred frame number in cut counter 410 is 7 of the total number of frames in the cut A, and the value of the remaining frame number in ring buffer counter 411 is 0. When the value of the remaining frame number counter 411 in the ring buffer is less than 4 * 2 = 8 frames, the untransferred frame number counter 410 in the cut
Is less than 4 * 2 = 8 frames, the transfer control selection unit 416 selects the transfer control unit 414 at the end of cutting.

The transfer control unit 414 at the end of the cut sets the value 7 of the untransferred-in-cut-frame counter 410 to 7 in the continuous transfer frame number holding unit 404. The frame is accessed by the random access execution unit 403, and the continuous transfer execution unit 405 transfers the eleventh to seventeenth partial frames to the ring buffer 406.

Next, the time division transfer switching section 417 switches to channel 2. The random access initializing unit 432 of the second channel sets the first 121st frame of the cut D in the random access first frame position holding unit 402. The value of the number-of-untransferred-frames-in-cut counter 430 is set to 5 of the total number of frames of the cut D, and the value of the remaining frame number counter 431 in the ring buffer is set to 0. When the value of the remaining frame number counter 431 in the ring buffer is less than 4 * 2 = 8 frames, the untransferred frame number counter 430 in the cut
Is less than 4 * 2 = 8 frames, the transfer control selection unit 436 selects the transfer control unit 434 at the end of cutting.

Since the cut end transfer control section 434 sets the value of the untransferred intra-cut frame number counter 430 to 5 in the continuous transfer frame number holding section 404, as a result, the 121st partial The random access execution unit 403 accesses the frame, and the continuous transfer execution unit 405 transfers the 121st to 125th partial frames to the ring buffer 426.

From the ring buffer 406, the eleventh to the first
The four partial frames are transferred to the digital video assembling unit 407, synthesized into a frame, and reproduced on the video display unit 408.
At the same time, from the ring buffer 427 to the 121st to 124th
While the partial frame is transferred to the digital video assembling unit 427, combined with the frame, and reproduced by the video display unit 428, the time division transfer switching unit 417 first switches to the first channel, and the transfer control unit at the end of the previous cut. Reference numeral 414 sets the 21st frame, which is the first frame of the next cut B, in the random access start frame position holding unit 402.

At this time, the value of the untransferred-frame-in-cut counter 410 is 7 of the total number of frames in the cut B, and the value of the remaining-frame-in-buffer counter 411 is 7 in the ring buffer 406. When the value of the remaining frame number counter 411 in the ring buffer is less than 7 frames and 8 frames,
Since the value of 10 is less than 7 frames and 8 frames, the transfer control selection unit 416 selects the transfer control unit 414 at the end of cutting.

Since the cut end transfer control section 414 sets the value of the untransferred frame number within cut counter 410 to 7 in the continuous transfer frame number holding section 404, the 21st partial frame of the partial digital video storage section 401 is randomly set. The access execution unit 403 accesses and the continuous transfer execution unit 40
5 transfers the 21st partial frame to the 27th partial frame to the ring buffer 406. Then, the time-division transfer switching unit 417 switches to the second channel, and the previous cut end transfer control unit 434 sets the 145th frame, which is the first frame of the next cut E, in the random access start frame position holding unit 402.

At this time, the value of the untransferred frame number in cut counter 430 contains 8 of the total number of frames in the cut E, and the value of the remaining frame number in ring buffer counter 431 contains the number of frames 5 in the ring buffer 426. If the value of the remaining frame number counter 431 in the ring buffer is less than 5 frames and 8 frames,
Since the value of 30 is 8 frames or more than 8 frames, the transfer control selection unit 436 selects the normal transfer control unit 433.

Since the normal transfer control unit 433 sets the number of reproduction cycle frames to 4 in the continuous transfer frame number holding unit 404, the random access execution unit 403 accesses the 145th partial frame of the partial digital video storage unit 401, The continuous transfer execution unit 405 transfers the 145th partial frame to the 148th partial frame to the ring buffer 426.

From the ring buffer 406, the fifteenth through the first
The 7th partial frame and the 21st partial frame are transferred to the digital video assembling section 407 and synthesized into a frame and reproduced by the video display section 408. At the same time, the 125th and 145th to 147th partial frames from the ring buffer 426 are converted to the digital video assembling section. While being transferred to the frame 427 and being synthesized into a frame and being reproduced by the video display unit 428, the time division transfer switching unit 417 switches to the first channel, and the transfer control unit 414 at the end of the previous cut sets the start of the next cut C Is set in the random access head frame position holding unit 402.

At this time, the value of the untransferred frame number in cut counter 410 is 7 of the total number of frames in the cut C, and the value of the remaining frame number in ring buffer counter 411 is 10 of the number of frames in the ring buffer 406. The value of the ring buffer remaining frame counter 411 is 10 frames and 8
Since the number of frames is equal to or greater than the number of frames, the transfer control selection unit 416 selects the remaining buffer transfer control unit 415. The buffer remaining transfer control unit 415 performs neither random access nor continuous transfer. Then, the time-division transfer switching unit 417 switches to the second channel, and the previous normal transfer control unit 433 sets the 149th frame following the cut E in the random access head frame position holding unit 402.

At this time, the value of the untransferred-frame-in-cut counter 430 contains the number of remaining frames 4 in the cut D, and the value of the remaining frame number in ring buffer counter 431 contains the number of frames 5 in the ring buffer 426. If the value of the remaining frame number counter 431 in the ring buffer is less than 5 frames and 8 frames,
Since the value of 30 is less than 4 frames and 8 frames, the transfer control selection unit 436 selects the transfer control unit 434 at the end of cutting.

Since the cut end transfer control section 434 sets the value of the untransferred intra-cut frame number counter 431 to 4 in the continuous transfer frame number holding section 404, the 149th partial frame of the partial digital video storage section 401 is randomized. The access execution unit 403 accesses and the continuous transfer execution unit 4
05 transfers the 149th to 152nd partial frames to the ring buffer 426.

From the ring buffer 406, the 22nd to the 2nd
The five-part frame is transferred to the digital video assembling unit 407, synthesized into a frame, and reproduced by the video display unit 408.
At the same time, from the ring buffer 426 to the 148th to 151st
While the partial frame is transferred to the digital video assembling unit 427, combined with the frame, and reproduced by the video display unit 428, the time division transfer switching unit 417 first switches to the first channel. At this time, the value of the untransferred-frame-in-cut counter 410 is 7 of the total number of frames in the cut C, and the value of the remaining-frame-in-buffer counter 411 is 6 in the ring buffer 406. Since the value of the remaining frame number counter 411 in the ring buffer is less than 6 and 8 frames, and the value of the untransferred frame number in cut counter 410 is less than 7 and 8 frames,
The transfer control selection unit 416 is a transfer control unit 414 at the end of cutting.
Select

Since the cut end transfer control section 414 sets the value of the untransferred frame number within cut counter 410 to 7 in the continuous transfer frame number holding section 404, the 31st partial frame of the partial digital video storage section 401 is randomly set. The access execution unit 403 accesses and the continuous transfer execution unit 40
5 transfers the 31st partial frame to the 37th partial frame to the ring buffer 406. Then, the time division transfer switching unit 417 switches to the second channel, and the previous cut end transfer control unit 434 sets the 161st frame, which is the first frame of the next cut F, in the random access start frame position holding unit 402.

At this time, the value of the untransferred-frame-in-cut counter 430 contains 4 of the total number of frames in the cut F, and the value of the remaining-frame-in-ring-buffer counter 431 contains 5 of the number of frames in the ring buffer 426. If the value of the remaining frame number counter 431 in the ring buffer is less than 5 frames and 8 frames,
Since the value of 30 is less than 4 frames and 8 frames, the transfer control selection unit 436 selects the transfer control unit 434 at the end of cutting.

Since the cut end transfer control section 434 sets the value of the untransferred intra-cut frame number counter 430 to 4 in the continuous transfer frame number holding section 404, the 161st partial frame of the partial digital video storage section 401 is randomly set. The access execution unit 403 accesses and the continuous transfer execution unit 4
05 transfers the 161st partial frame to the 164th partial frame to the ring buffer 426.

Thereafter, from the ring buffer 406 to the 26th.
27, the thirty-first to thirty-seventh partial frames are transferred to the digital video assembling unit 407, synthesized into a frame, reproduced by the video display unit 408, and output from the ring buffer
The two partial frames, the 161st partial frame to the 164th partial frame, are transferred to the digital video assembling unit 427, combined with the frame, and reproduced by the video display unit 428.

As described above, in the fourth embodiment of the present invention, two cut edit information composed of cuts having an arbitrary length of four frames or more as shown in FIGS. Simultaneous continuous playback is possible.

In the fourth embodiment, the two video display units are two independent display devices, but may be one special effect device for realizing a wipe having two independent video inputs. Good.

In the first to fourth embodiments, a configuration may be adopted in which sound is reproduced continuously instead of video.

[0115]

As described above, according to the video editing apparatus of the present invention, if the length of the cut is longer than a certain length, the cut can be taken in units of one frame, and the same digital video storage unit can be time-divided. Can play multiple channels of video simultaneously.
In addition, by using a plurality of digital video storage units, the effective data transfer speed can be increased and the minimum cut length can be shortened, so that its practical value is large.

[Brief description of the drawings]

FIG. 1 is a block diagram of a video editing apparatus according to a first embodiment of the present invention.

FIG. 2 is a block diagram of a video editing apparatus according to a second embodiment of the present invention.

FIG. 3 is a block diagram of a video editing apparatus according to a third embodiment of the present invention.

FIG. 4 is a block diagram of a video editing apparatus according to a fourth embodiment of the present invention.

FIG. 5 is a relationship diagram showing cut editing information according to the first and second embodiments.

FIG. 6 is a relationship diagram showing cut editing information of a first channel in the third and fourth embodiments.

FIG. 7 is a relationship diagram showing cut editing information of a second channel according to the third and fourth embodiments.

FIG. 8 is a block diagram of a conventional video editing device.

FIG. 9 is a diagram showing cut editing information of a conventional video editing device.

FIG. 10 is a diagram showing cut editing information that cannot be reproduced by a conventional video editing device.

[Explanation of symbols]

Reference Signs List 101 Digital video storage unit 102 Random access head frame position holding unit 103 Random access execution unit 104 Continuous transfer frame number storage unit 105 Continuous transfer execution unit 106 Ring buffer 107 Video display unit 108 Cut editing information storage unit 109 Number of untransferred frames in cut Counter 110 Number of remaining frames in ring buffer Counter 111 Random access initialization unit 112 Normal transfer control unit 113 Transfer control unit at the end of cut 114 Buffer remaining transfer control unit 115 Transfer control selection unit 201 Partial digital video storage unit 202 Random access head Frame position holding unit 203 Random access execution unit 204 Continuous transfer frame number holding unit 205 Continuous transfer execution unit 206 Ring buffer 207 Digital video assembling unit 208 Video display unit 20 9 Cut edit information holding unit 210 Untransferred frame number counter in cut 211 Remaining frame number counter in ring buffer 212 Random access initialization unit 213 Normal transfer control unit 214 Transfer control unit at end of cut 215 Buffer remaining transfer control unit 216 Transfer Control selection section 301 Digital video storage section 302 Random access start frame position holding section 303 Random access execution section 304 Continuous transfer frame number holding section 305 Continuous transfer execution section 306 First channel ring buffer 307 First channel video display section 308 1-channel cut editing information holding section 309 1st channel untransferred frame number counter in cut 310 310 1st channel ring buffer remaining frame counter 311 1st channel random access initialization section 312 1-channel normal transfer control unit 313 Transfer control unit at the end of cut of first channel 314 Transfer control unit for remaining buffers of first channel 315 Transfer control selection unit of first channel 316 Time-division transfer switching unit 326 Second-channel transfer switching unit 326 Ring buffer 327 Second channel video display unit 328 Second channel cut editing information holding unit 329 Second channel non-transferred frame number counter in cut 320 Second channel ring buffer remaining frame counter 331 Second channel random Access initialization section 332 Second channel normal transfer control section 333 Second channel cut end transfer control section 334 Second channel buffer remaining time transfer control section 335 Second channel transfer control selection section 401 Partial digital video storage Part 402 random access first frame Position holding section 403 Random access execution section 404 Continuous transfer frame number holding section 405 Continuous transfer execution section 406 First channel ring buffer 407 First channel digital video assembling section 408 First channel video display section 409 First channel cut Editing information holding unit 410 Number of untransferred frames in cut of first channel counter 411 Number of remaining frames in ring buffer of first channel 412 Random access initialization unit of first channel 413 Normal transfer control unit of first channel 414 First Channel cut end transfer control section 415 First channel buffer remaining time transfer control section 416 First channel transfer control selection section 417 Time division transfer switching section 426 Second channel ring buffer 427 Second channel digital video assembly Part 428 2 channel video display section 429 2nd channel cut edit information holding section 430 2nd channel untransferred frame count counter in cut 431 2nd channel ring buffer remaining frame counter 432 2nd channel random access initialization section 433 second channel normal transfer control unit 434 second channel cut end transfer control unit 435 second channel buffer remaining time transfer control unit 436 second channel transfer control selection unit

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) H04N 5/91-5/956 G06T 1/60 H04N 5/76-5/907

Claims (4)

(57) [Claims] 1. A digital video storage system in which each continuous frame as a moving image of a digital video is stored in its continuous area, and a digital video storage unit capable of random access and a top frame position at the time of random access to the digital video storage unit are held. A random access head frame position holding unit, a random access execution unit that executes random access to a frame position in the digital video storage unit held in the random access head frame position holding unit, A continuous transfer frame number holding unit for holding the number of transfer frames, and a digital display of the number of frames held in the continuous transfer frame number holding unit from a frame position in the digital video storage unit accessed by the random access execution unit. Execute continuous transfer to continuously transfer video And while playing back the continuous digital video of the number of frames at a certain number of frames, the digital video storage unit is randomly accessed once by the random access execution unit, and the continuous transfer execution unit performs the random access of the number of frames. If the number of frames that satisfies the condition that the number of continuous frames obtained by subtracting 1 from double is reduced is referred to as the number of frames of the reproduction cycle, the digital video of the number of frames obtained by subtracting 2 from four times the number of frames of the reproduction cycle can be held. A ring buffer that is a cyclic FIFO that temporarily holds digital images continuously transferred from the continuous transfer execution unit, an image display unit that displays digital images output from the ring buffer, and a digital image storage unit. The cut which is a continuous small area of the number of frames equal to or more than the number of frames of the reproduction cycle and A cut edit information holding unit that holds the order in which the cuts are connected; a cut untransferred frame number counter that holds the number of untransferred frames currently being cut that is held in the cut edit information holding unit and that is currently being played; A counter of the number of unplayed frames held in the ring buffer, a counter of the number of remaining frames in the ring buffer, and a start frame position of the first cut held in the cut edit information holding unit, A random access initialization unit to be set in the position holding unit, and the reproduction period frame is stored in the continuous transfer frame number holding unit while the digital video of the reproduction period frame number in the ring buffer is transferred to the video display unit. The random access execution unit sets one random access and the continuous transfer execution unit One continuous digital video transfer from the digital video storage unit to the ring buffer is executed, and after the continuous transfer is completed, the value in the random access head frame position holding unit is set to the current value, and the number of reproduction cycle frames is changed. A normal transfer control unit for updating to the added value; and a cut-off unit for the continuous transfer frame number holding unit while the digital video of the number of reproduction cycle frames in the ring buffer is transferred to the video display unit. The number of frames held in the untransferred frame number counter is set, and one random access by the random access execution unit and one digital video from the digital video storage unit to the ring buffer by the continuous transfer execution unit are set. Execute the continuous transfer, and after the end of the continuous transfer, the current playback A transfer control unit at the end of cut for setting the start frame position of the next cut, if any, to the random access start frame position holding unit, and the number of the reproduction cycle frames in the ring buffer. While the digital video is transferred to the video display unit, it is held in the buffer remaining multi-time transfer control unit that does not perform random access and continuous transfer from the digital video storage unit and the ring buffer remaining frame number counter. The number of frames is 2 of the number of frames in the reproduction cycle.
When the number is less than twice, and when the number of frames held in the untransferred frame number in cut counter is more than twice the number of frames in the reproduction cycle, the normal transfer control unit is started, and When the number of frames held in the frame number counter is less than twice the number of frames in the playback cycle, and when the number of frames held in the counter of untransferred frames in cut is less than twice the number of frames in the playback cycle. In some cases, the transfer control unit at the end of cut is started, and when the number of frames held in the remaining frame number counter in the ring buffer is equal to or more than twice the number of frames in the reproduction cycle, the transfer control unit when the buffer is too many. And a transfer control selecting unit for activating the video editing. 2. A partial frame constituting each continuous frame as a moving image of a digital video is stored in the continuous area, and a plurality of random accessible partial digital video storages; A random access head frame position holding unit holding each head frame position at the time of random access, and a random access to a frame position in the partial digital video storage unit held in the random access head frame position holding unit. A random access execution unit that is executed for each of the partial digital video storage units, a continuous transfer frame number holding unit that holds a continuous transfer frame number of the digital video, and the partial digital video accessed by the random access execution unit. From the frame position in the storage unit, The number of partial frames held in the transfer frame number holding unit is continuously transferred, and a continuous transfer execution unit existing for each of the partial digital image storage units, and a certain number of frames is used to reproduce the continuous digital video of the number of frames. Condition that the partial digital video storage unit can be randomly accessed once by the random access execution unit and the continuous transfer execution unit can transfer the number of consecutive partial frames obtained by subtracting 1 from twice the number of frames. If the number of frames satisfying the above is termed the number of reproduction cycle frames, the number of partial frames obtained by subtracting 2 from four times the number of reproduction cycle frames can be held, and the digital video continuously transferred by the continuous transfer execution unit is temporarily stored. Traveling FI
A ring buffer that is a FO and is provided for each of the partial digital video storage units, a digital video assembling unit that creates a digital video by constructing a frame from partial frames output from all of the ring buffers;
An image display unit for displaying a digital image output from the digital image assembling unit is connected to the cut and the cut, which are continuous small areas having the number of frames equal to or greater than the number of frames of the reproduction cycle in the partial digital image storage unit. A cut editing information holding unit that holds an order; a cut untransferred frame number counter that holds the number of untransferred frames currently being cut that is held in the cut editing information holding unit and that is currently being played; The number of remaining frames in the ring buffer that holds the number of unplayed frames that are held in the memory, and the first frame position of the first cut that is held in the cut edit information holding unit is set in the random access head frame position holding unit. A random access initialization unit that performs While the digital video is transferred to the video assembling unit, the number of reproduction cycle frames is set in the continuous transfer frame number holding unit, and one random access by the random access execution unit and the Performing a single digital video continuous transfer from the partial digital video storage unit to the ring buffer;
After the end of continuous transfer, a normal transfer control unit that updates the value in the random access head frame position holding unit to a value obtained by adding the number of frames for the reproduction cycle to the current value, and the reproduction cycle in the ring buffer. While the digital video of the number of frames is transferred to the video assembling unit, the number of frames held in the untransferred frame number in cut counter is set in the continuous transfer frame number holding unit, and 1 is set by the random access execution unit. The random access and the continuous transfer execution unit execute one digital video continuous transfer from the partial digital video storage unit to the ring buffer, and after the continuous transfer is completed, the digital video image is held in the cut edit information holding unit. If there is a cut following the currently played cut, the start frame position is set to the random access start A transfer control unit at the end of cutting for setting the frame position in the frame position holding unit; and random access and digital video storage during the transfer of the digital video of the reproduction cycle frame number in the ring buffer to the video assembling unit. A buffer remaining multi-time transfer control unit that does not perform continuous transfer from the unit, and when the number of frames held in the ring buffer remaining frame number counter is less than twice the number of frames in the reproduction cycle, and When the number of frames held in the untransferred frame number counter is equal to or more than twice the number of frames in the reproduction cycle, the normal transfer control unit is activated, and the number of frames held in the ring buffer remaining frame counter is equal to the number of frames. The number of frames that are less than twice the number of frames in the reproduction cycle and are held in the untransferred frame number counter in the cut If the number is less than twice the number of frames of the reproduction cycle, the transfer control unit at the end of cutting is started, and the number of frames held in the remaining frame number counter in the ring buffer is at least twice the number of frames of the reproduction cycle. A video editing device, comprising: a transfer control selecting section for activating the transfer control section when the buffer is large. 3. A digital video storage unit stores successive frames as moving images of a digital video in a continuous area thereof, and holds a digital video storage unit that can be randomly accessed and a top frame position when the digital video storage unit is randomly accessed. A random access head frame position holding unit, a random access execution unit that executes random access to a frame position in the digital video storage unit held in the random access head frame position holding unit, A continuous transfer frame number holding unit for holding the number of transfer frames, and a digital display of the number of frames held in the continuous transfer frame number holding unit from a frame position in the digital video storage unit accessed by the random access execution unit. Execute continuous transfer to continuously transfer video When a certain natural number of 2 or more is set as the number of reproduction channels, the digital video storage section is reproduced by the random access execution section while the continuous digital video of the number of frames is reproduced with a certain number of frames. When the random transfer is performed several times and the number of consecutive frames obtained by subtracting 1 from twice the number of frames by the continuous transfer execution unit is satisfied and the number of frames satisfying the condition that the number of consecutive frames can be transferred several times is referred to as the number of reproduction cycle frames, A cyclic FIFO that can hold digital video of a number of frames obtained by subtracting 2 from four times the number of frames of the reproduction cycle, and temporarily hold digital video continuously transferred by the continuous transfer execution unit; Displaying a ring buffer and digital video output from the ring buffer; A plurality of video display units, a cut which is a continuous small area having a number of frames equal to or greater than the number of frames of the reproduction cycle in the digital video storage unit, and an order in which the cuts are connected; An editing information holding unit, holding the number of untransferred frames in the cut currently being played and held in the cut editing information holding unit, the number of untransferred frames in cut having the number of the reproduction channels, and the ring The number of unplayed frames held in the buffer is held, the number of remaining frames in the ring buffer corresponding to the number of the playback channels, and the first frame position of the first cut held in the cut edit information holding unit are stored in the buffer. The random access initializing unit, which is set in the random access head frame position holding unit and has several reproduction channels, While the digital video of the number of playback cycle frames in the buffer is transferred to the video display unit, set the number of playback cycle frames in the continuous transfer frame number holding unit,
One random access by the random access execution unit and one digital video continuous transfer from the digital video storage unit to the ring buffer by the continuous transfer execution unit are performed. By updating the value in the position holding unit to a value obtained by adding the number of reproduction cycle frames to the current value,
The normal transfer control unit having several reproduction channels, and the digital video of the reproduction cycle frame number in the ring buffer is transferred to the video display unit, and the untransferred data within the cut is transferred to the continuous transfer frame number holding unit. The number of frames held in a frame number counter is set, and one random access by the random access execution unit and one digital video continuous transfer from the digital video storage unit to the ring buffer by the continuous transfer execution unit are performed. After the end of the continuous transfer, if there is a cut following the currently reproduced cut held in the cut editing information holding unit, if any, the head frame position is set in the random access head frame position holding unit. The transfer control unit at the end of cutting, which includes the reproduction channels, and the ring buffer. The random access and the continuous transfer from the digital video storage unit are not performed while the digital video of the number of frames of the reproduction cycle is transferred to the video display unit. And when the number of frames held in the ring buffer remaining frame counter is less than twice the number of frames in the playback cycle, and the number of frames held in the untransferred frame number in cut counter is the playback cycle Activating the normal transfer control unit when the number of frames is more than twice the number of frames, and when the number of frames held in the remaining frame number counter in the ring buffer is less than twice the number of frames in the reproduction cycle, and If the number of frames held in the untransferred frame counter within cut is less than twice the number of frames in the reproduction cycle, the cut When the number of frames held in the ring buffer remaining frame counter is equal to or more than twice the number of frames in the reproduction cycle, the buffer remaining time transfer control unit is started, and A transfer control selecting unit having a number of reproduction channels, and a digital video of the number of reproduction cycle frames in the ring buffer being transferred to the video display unit; The random access initialization unit, the ring buffer, the video display unit, the untransferred frame number counter in the cut, the remaining frame number counter in the ring buffer, the normal transfer control unit, the transfer control unit at the end of the cut, and the buffer A video editing apparatus comprising: a time-division transfer switching unit that switches a set of remaining multi-time transfer control units in a time-division manner. 4. A partial frame constituting each continuous frame as a moving image of a digital video is stored in a continuous area thereof, and a plurality of random accessible digital video storages; Random access is performed to a random access start frame position holding unit that holds a start frame position at the time of random access and a frame position in the partial digital video storage unit that is held in the random access start frame position holding unit. A random access execution unit provided for each of the partial digital video storage units; a continuous transfer frame number holding unit for holding a continuous transfer frame number of digital video; and the partial digital video storage accessed by the random access execution unit. From the frame position in the There are times when the digital video of the number of frames held in the transmission frame number holding unit is continuously transferred, and the continuous transfer execution unit existing for each of the partial digital video storage units and a certain natural number of 2 or more are set as the number of reproduction channels. While the continuous digital video of the number of frames is being reproduced by the number of frames, the random access execution unit randomly accesses the partial digital video storage unit the number of times of the reproduction channel, and the continuous transfer execution unit executes the number of frames. If the number of frames that satisfies the condition that the number of consecutive partial frames obtained by subtracting 1 from twice the number of times that can be transferred several times on the reproduction channel is referred to as the number of reproduction cycle frames, the number of frames obtained by subtracting 2 from four times the number of reproduction cycle frames The number of partial frames can be held, and the digital video continuously transferred from the continuous transfer execution unit is temporarily stored. Times type of FIFO
The digital video is constructed by constructing a frame from a ring buffer having the number obtained by multiplying the number of reproduction channels by the number of partial digital video storage units and partial frames output from the ring buffers of several partial digital video storage units. The digital video assembling unit having the number of the reproduction channels, displaying the digital video output from the digital video assembling unit, displaying the video with the number of the reproduction channels, and storing the digital video in the partial digital video storage unit. The cuts, which are continuous small areas having the number of frames equal to or more than the reproduction cycle frame, and the order in which the cuts are connected are held, and the cut edit information holding unit having the number of reproduction channels and the cut edit information holding unit are held. Hold the number of untransferred frames that are currently being played back during cutting, and A number of untransferred frame counters in the cut buffer, the number of unplayed frames held in the ring buffer, the number of remaining frames in the ring buffer the number of playback channels, and the cut editing information holding The first frame position of the first cut held in the unit is set in the random access head frame position holding unit, and the random access initialization unit having several reproduction channels and the reproduction cycle frame number in the ring buffer are set. While the partial frames are transferred to the video assembling unit, the number of reproduction cycle frames is set in the continuous transfer frame number holding unit,
The random access and the continuous transfer execution unit perform one continuous transfer of the partial frame from the partial digital video storage unit to the ring buffer. After the continuous transfer, the value in the random access head frame position holding unit is stored. Is updated to a value obtained by adding the number of the reproduction cycle frames to the current value, and the normal transfer control unit having the number of the reproduction channels, and the partial frame of the number of the reproduction cycle frames in the ring buffer are displayed on the video display. During the transfer to the unit, the number of frames held in the untransferred frame number in cut counter is set in the continuous transfer frame number holding unit, and the random access execution unit performs one random access and the continuous transfer execution Unit performs a single partial frame continuous transfer from the partial digital video storage unit to the ring buffer. After the continuous transfer is completed, if there is a cut following the currently reproduced cut held in the cut editing information holding unit, if any, the leading frame position is set in the random access leading frame position holding unit. Performing the random access, the partial digital video storage while the digital video of the reproduction cycle frame number in the ring buffer is transferred to the video assembling unit. And the number of frames held in the remaining buffer number counter in the ring buffer, which does not perform continuous transfer from the unit, is less than twice the number of frames in the playback cycle. Time, and the number of frames held in the untransferred frame number counter within cut is 2 times the number of frames in the reproduction cycle. If the above is the case, the normal transfer control unit is started, and when the number of frames held in the ring buffer remaining frame counter is less than twice the number of frames in the reproduction cycle, and the untransferred frames in the cut When the number of frames held in the number counter is less than twice the number of frames in the reproduction cycle, the transfer control unit at the end of cutting is started, and the number of frames held in the remaining frame number counter in the ring buffer is equal to the number of frames in the reproduction. If the number is equal to or more than twice the number of periodic frames, the buffer remaining multiple transfer control unit is activated, and the transfer control selecting unit having the number of reproduction channels and the digital image of the number of reproduction cycles in the ring buffer are transmitted. While being transferred to the video assembling unit, the cut editing information holding unit, the random access initializing unit, and the portion of the reproduction channels A digital video storage unit;
The video assembling unit, the video display unit, the untransferred frame number counter in the cut, the remaining frame number counter in the ring buffer, the normal transfer control unit, the transfer control unit at the end of cut, and the transfer control unit at the time of buffer remaining And a time-division transfer switching unit for switching the set consisting of in a time-division manner.