JP4319286B2 - Non-linear recording / playback device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a recording / playback apparatus used for television broadcasting, and more particularly to an apparatus for automatically changing the transmission order of video materials to an appropriate one in a non-linear recording / playback apparatus using a disk medium such as a hard disk as a storage device.
[0002]
[Prior art]
In television broadcasting, live video material (such as a video of a person who makes a comment, hereinafter referred to as live video material) and video material (recorded video material) recorded in advance are switched (switched). ) Many broadcasts. FIG. 7 is a chart showing an example of such a video material transmission order (main line transmission order). The raw video material is marked with Arabic numerals and the recorded video material is marked with alphabet.
[0003]
FIG. 9 is a block diagram showing an example of a conventional video transmission system using two tape recorders 13 and 15 and a camera 12. The tape recorders 13 and 15 constitute a recording / reproducing device 17 as a whole. Reference numerals such as A and B in the boxes of the tape recorders 13 and 15 are drawn in the image reproduction order of the video material scheduled to be reproduced by the tape recorders 13 and 15, respectively. Actually, video tapes 13 and 15 are sequentially replaced with video tapes each recording video materials A, B, etc., so that the video materials are reproduced in the originally scheduled order. The replacement of the video tape is performed manually by a person each time, or a video tape automatic replacement device is separately prepared. At this time, if only the video material transmitted by the recording / reproducing apparatus 17 is viewed, it is understood that the video materials are transmitted in the order of A, B, C, D, E, F...
[0004]
Hereinafter, the order in which the recording / reproducing apparatus 17 sends the video material is referred to as the main sending order of the recording / reproducing apparatus 17. On the other hand, the transmission order of the video material of each of the tape recorders 13 and 15 is called a sub-transmission order. Reference numerals such as v1-1 and v1-2 shown below each video material indicate a sub-transmission order set for each transmission line. For example, v1-1 means that the first transmission line V1 is transmitted. Also, “...” In the figure indicates that the video material that follows is omitted.
[0005]
In the following description, “video material” includes audio at the same time, but also includes only video without audio. Further, even if there is actually no video and only audio is recorded, the present invention will be described as “video material”.
[0006]
The recorded video material is recorded in advance as a plurality of video materials, edited in advance, and used for actual broadcasting. Therefore, the time required for these recorded video materials is already determined before broadcasting. On the other hand, the required time for live video may vary depending on the progress of the program.
[0007]
For this reason, switching from a raw video material to another video material is performed by a person manually operating the switcher SW while watching the progress of the program. That is, by switching (switching) the video output of the transmission lines V1, V2 and V3 of the two tape recorders 13 and 15 and the camera 12 by the switcher SW, the video material can be transmitted to the main line 10 in a desired order. it can. In FIG. 9, only three transmission lines are shown, but an actual broadcasting station has a larger number of transmission lines, and these are switched.
[0008]
Each video material is usually recorded on a separate video tape as described above. Therefore, in order to reproduce the next video material, it is necessary to change the video tape and to set the tape to advance to the head of the video material recorded on the video tape. Hereinafter, the time required for preparation for transmission of the video material is referred to as transmission preparation time.
[0009]
In order to secure this transmission preparation time, if the main transmission order is A, B, C, for example, the video tape recording the video material A and the video tape recording the video material B to be broadcast next are recorded on the same tape recorder. Do not play. Instead, as shown in FIG. 9, the sub-transmission order of the tape recorders 13 and 15 is set so as to be reproduced by different tape recorders. As a result, when the video material A is being sent out by the tape recorder 13, the video material is prepared to be sent out by the video tape recording the video material B in the tape recorder 15.
[0010]
In recent years, instead of video tape recorders, digital video recording and reproduction has been performed using a magnetic disk device such as a hard disk or a magneto-optical disk device. According to this, the video material recorded on the disc can be randomly accessed, and the transmission order of the video material once recorded can be changed very easily. This type of video recording / playback apparatus is called a non-linear type because of its easy random access. At this time, the video signal is digitized, and an image compression technique such as MPEG may be used to save recording capacity.
[0011]
On the other hand, in the video tape recorder, it takes time to change the video transmission order, such as changing the video tape and moving the tape forward or backward. For this reason, it is suitable for sequentially sending video materials in a preset order, but not suitable for complicated sending order switching. For this reason, a format using a conventional video tape recorder is called a linear type.
[0012]
In a non-linear video recording / reproducing apparatus using a non-volatile storage device such as a disk medium, it is very easy to access an arbitrary position of a video material. However, switching with a raw video material still requires the use of a switcher. This is because even a non-linear video recording / playback apparatus requires a cue time for properly cueing the video material and, as described above, a switcher for switching to a raw video material whose required time varies. This is because manual operation using is necessary. For this reason, even when the non-linear recording / reproducing apparatus is used, it is necessary to provide a plurality of transmission lines in the non-linear recording / reproducing apparatus.
[0013]
FIG. 10 is a block diagram showing an example of a video transmission system using the non-linear recording / reproducing apparatus 18. Components corresponding to those in FIG. 9 are denoted by the same reference numerals. Dashed lines 14 and 16 indicate that they correspond to conventional video tape recorders. In the non-linear recording / reproducing apparatus 18, a plurality of transmission lines can be provided in one unit. Here, the sub-transmission order of the video material of the first and second transmission lines V1 and V2 is virtually illustrated by using symbols A, B, C, D, and F.
[0014]
[Problems to be solved by the invention]
In news programs, etc., it may be desired to add video material immediately before broadcasting. On the other hand, there are cases where the broadcast time is insufficient and it is desired to delete the video material that was scheduled to be broadcast, or to change the broadcast order. Therefore, a case where a recorded video material A ′ is added next to the video material A using a non-linear recording / reproducing apparatus, for example, as shown in the main line transmission order of FIG. FIG. 12 shows the main sending order of the non-linear recording / reproducing apparatus 18 before and after the change in this case. It is assumed that the video material A ′ was originally recorded, but was not originally scheduled for broadcasting.
[0015]
FIG. 13 is a diagram illustrating an example of the transmission order of the video material of each transmission line in the example of FIG. Since the recorded video material A ′ is transmitted next to the recorded video material A, the transmission lines of the video materials A and A ′ need to be different from each other. Therefore, the video material A ′ is arranged in the first v2-1 in the sub-transmission order of the second transmission line V2. Then, the original video material on the second transmission line V2 other than the video material B is shifted backward in order with the interruption of the video material A ′. It should be noted that such an operation cannot be easily performed with a video tape recorder, but can be easily performed with a non-linear recording / reproducing apparatus.
[0016]
FIG. 14 is a diagram showing the relationship between the main sending order and the sub sending order when the video material A ′ shown in FIG. 11 is added. At this time, there is no problem because the video material A and the video material A ′ to be transmitted next are arranged on different transmission lines. However, as indicated by the dashed arrow, the video material B transmitted next to the video material A ′ is allocated to the next transmission order v2-2 on the same second transmission line V2 as the video material A ′. That is, since the video material A ′ and the video material B are adjacent to each other in the same sub-transmission order, it is not possible to secure a time for cuing the video material B.
[0017]
Next, consider a case where the video material D is deleted from the transmission order of FIG. Note that this may be considered as a case where the video material D is skipped. FIG. 15 is a diagram showing the relationship between the main sending order and the sub sending order according to this example. In this case, the video material E is transmitted next to the video material C in the main transmission order. However, in the example of FIG. 15, since the video materials C and E are arranged adjacent to each other in the sub-sending order of the same first sending line V1, as shown by the broken arrow, The cueing operation time of the video material E to be sent next cannot be secured. The same thing occurs when the order of video materials is changed.
[0018]
Such a problem occurs because even if the non-linear recording / reproducing apparatus 18 is used, the linear idea using the video tape recorder has been used. In other words, this is because the transmission order is set only for the added or deleted video material while the transmission order set in each of the broken lines 14 and 16 is kept as it is.
[0019]
Therefore, when video materials are added, deleted, or rearranged, the video material transmission order is changed so that the concept of the conventional linear type recording / playback device is removed and the time required for cueing each video material can be secured. It needs to be replaced appropriately.
[0020]
[Means for solving the problems]
The present invention solves the above-described problems by using a non-linear recording / reproducing apparatus capable of random access using a disk medium or the like. This non-linear recording / reproducing apparatus has a plurality of transmission lines, and the sub-transmission order of the video material is set to each of the plurality of transmission lines in accordance with the main transmission order of the video material. At this time, when the main transmission order is changed, any video materials X and Y adjacent in the changed main transmission order are assigned to sub-transmission orders of different transmission lines.
[0021]
At this time, the sub-transmission order after the main transmission order is changed may be determined by sequentially assigning video materials assigned in an earlier order in the changed main transmission order. Note that such video material replacement operation is controlled by control means such as a microprocessor included in the non-linear recording / reproducing apparatus, and is realized by programming in advance. As a result, it is possible to make full use of the characteristic of random access of the non-linear recording / reproducing apparatus and transmit video materials with appropriate replacement.
[0022]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 is a diagram showing the video material transmission order of each transmission line of the non-linear recording / reproducing apparatus 18 according to the present invention, and particularly shows an example of realizing the main transmission sequence with the addition of the video material A ′ shown in FIG. Note that the video material from the camera is not directly related to the present invention and is omitted here for simplicity. In the following description, the same reference numerals are given to those corresponding to the conventional example.
[0023]
FIG. 2 is a diagram showing the relationship before and after the change of the sub-transmission order of each transmission line when the video material A ′ is added according to the present invention. The sub-transmission order before the change is as shown in FIG. According to the present invention, due to the change of the main transmission order, the video materials that are adjacent in the new main transmission order are rearranged on different transmission lines. For example, the video material A is incorporated in the sub-transmission order of the first transmission line V1 before and after the change. However, the video materials B, D, and F are incorporated in the sub-transmission order of the second transmission line V2 before the change, but are rearranged to be incorporated in the sub-transmission order of the first transmission line V1 after the change. . The video materials C and E are incorporated in the sub-transmission order of the first transmission line V1 before the change, but are rearranged so that they are incorporated in the sub-transmission order of the second transmission line V2 after the change.
[0024]
At this time, such a sub-transmission order can be changed relatively easily because it is a non-linear recording / reproducing apparatus. However, when a tape recorder is used, it is necessary to change the tape replacement order, which is complicated. The non-linear recording / reproducing apparatus 18 has arithmetic control means such as a microprocessor, and can be automatically controlled by programming in advance such a change in the sub-transmission order.
[0025]
FIG. 3 is a diagram illustrating the main sending order before and after the change when the video material D is deleted from the main sending order. FIG. 4 is a diagram showing the relationship before and after the change of the sub-transmission order of each transmission line in the case of FIG. Here, the video materials A, B, and C are output from the same transmission line before and after the main transmission order is changed. On the other hand, the video materials E and F are rearranged so as to be output from different transmission lines before and after the main transmission order is changed.
[0026]
FIG. 5 is a diagram showing a main sending order in which the sending order of the video material is changed although the video material is not added or deleted as compared with the case of FIG. In this example, the main sending orders of the video materials B and C and the video materials D and E are switched. 6 is a diagram showing before and after the change of the sub-transmission order of each transmission line in the main transmission order shown in FIG.
[0027]
At this time, as a result of the change in the main transmission order, for example, the video materials A and C that were not adjacent before the change are adjacent. Therefore, for the video materials A and C that were assigned to the V1 sub transmission order before the change, the video material A is first assigned to the first v1-1 of the V1 sub transmission order, and then the video material C is assigned to the V2 sub transmission order. The operation assigned to the first v2-1 is performed.
[0028]
Also, when viewing the video materials B and C, the transmission order is changed (reverse) although it is adjacent before and after the change of the main transmission order. From another point of view, it can be considered that the main sending sequence has been changed so that it becomes adjacent again. Therefore, in this case as well, the operation of assigning the video material B to the second v1-2 of the V1 sub transmission order is performed following the assignment of the video material C to the first v2-1 of the V2 sub transmission order. As described above, the sub-transmission order after changing the main transmission order is determined by sequentially assigning video materials assigned in the earlier order in the changed main transmission order. The same applies to the video materials E, D, F.
[0029]
As mentioned above, although this invention has been demonstrated using the example, various applications are possible. For example, in the above-described example, the example in which the non-linear recording / reproducing apparatus has two transmission lines has been described. However, the present invention can be similarly implemented when there are three or more transmission lines. The above description has been made on the assumption that one non-linear recording / reproducing apparatus is used. However, a plurality of transmission lines may be provided by using two or more non-linear recording / reproducing apparatuses. In this case, by providing a data bus capable of exchanging video data at a speed higher than the standard video playback speed between a plurality of nonlinear recording / playback apparatuses, an environment that can be virtually regarded as one non-linear recording / playback apparatus. Should be prepared.
[Brief description of the drawings]
FIG. 1 is a diagram showing a video material transmission order of each transmission line of a non-linear recording / reproducing apparatus according to the present invention.
FIG. 2 is a diagram showing the relationship before and after the change of the sub-transmission order of each transmission line when adding video material A ′ according to the present invention.
FIG. 3 is a diagram illustrating a relationship between a main transmission order before and after a change when deleting a video material D from the main transmission order;
FIG. 4 is a diagram showing the relationship before and after the change of the sub-transmission order of each transmission line when the video material D is deleted from the main transmission order.
FIG. 5 is a diagram illustrating the relationship between the main transmission order before and after the change when the transmission order of video materials is switched.
FIGS. 6A and 6B are diagrams showing before and after the change of the sub-transmission order of each transmission line when the transmission order of the video material is changed.
FIG. 7 is a diagram showing an example of the video material transmission order of the main line.
FIG. 8 is a diagram illustrating an example of a main sending order of the recording / reproducing apparatus.
FIG. 9 is a block diagram showing an example of a conventional video transmission system using two tape recorders and a camera.
FIG. 10 is a block diagram showing an example of a video transmission system using a non-linear recording / reproducing apparatus.
FIG. 11 is a diagram showing an example of the video material transmission order of the main line when the video material A ′ is added next to the video material A.
FIG. 12 is a diagram showing the main sending order of the recording / reproducing apparatus before and after the change when the video material A ′ is added.
FIG. 13 is a diagram showing a conventional example of the sub-transmission order of each transmission line when the video material A ′ is added.
FIG. 14 is a diagram of a conventional example showing the relationship between the main transmission order and the sub transmission order when the video material A ′ is added.
FIG. 15 is a diagram of a conventional example showing the relationship between the main sending order and the sub sending order when the video material D is deleted from the sending order.
[Explanation of symbols]
10 Main Line 12 Camera 13 Tape Recorder 14 Part 15 Corresponding to Tape Recorder 16 Tape Recorder 16 Part Corresponding to Tape Recorder 17 Linear Recording / Reproducing Device 18 Nonlinear Recording / Reproducing Device A to F Video Material A ′ Video Material SW Switcher V 1 to be Added First Sending line V2 Second sending line

Claims (3)

A plurality of delivery lines means, a non-linear recording and reproducing apparatus sub transmission order of the video material is set to each of said plurality of transmission lines means in accordance with the main transmission order of the image material,
When the main transmission order is changed, any video material adjacent in the main transmission order is assigned to the sub transmission order of the different transmission line means ,
The non-linear recording / reproducing apparatus , wherein the sub-transmission order after changing the main transmission order is determined by sequentially assigning from the video material assigned in an earlier order in the changed main transmission order . The non-linear recording / reproducing apparatus according to claim 1, wherein the change of the main transmission order is performed by adding, deleting, or changing the order of video materials. 3. The non-linear recording / reproducing apparatus according to claim 2, wherein when the main transmission order is changed, the sub-transmission order of the video material after the changed video material is always changed.

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