JP2830088B2 - Video signal playback device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a video signal reproducing apparatus applied to reproduction of a video CM master tape for automatically transmitting a CM (commercial) by a VTR.

[Conventional technology]

Video commercials using VTRs are used for television broadcast commercials. In a video commercial, a plurality of commercial materials are sequentially recorded on one magnetic tape. Traditionally,
The material information related to the CM material, such as the content of the CM and the sponsor, was inserted as a telop on the screen immediately before the screen to be actually broadcast. Conventionally, when it is desired to change the material information, it is necessary to recreate the telop, which is troublesome.
Time code recorded on the track in the longitudinal direction of the tape
It is conceivable to form the material information as the user bits of the LTC, but when the CM material is rewritten, the rewriting of the time code LTC may be forgotten, and the CM material may not match the material information.

Therefore, the time code VI recorded integrally with the CM material
If material information related to a CM material is formed in a user's bit of a TC (Vertical Interval Time Code), material information always corresponding to the CM material can be recorded.

[Problems to be solved by the invention]

If there is a difference in audio signal between CM materials such as monaural, stereo, bilingual, etc., it is necessary to switch the audio signal transmission mode even when reproducing the same tape. This mode switching is used for control.
Although it can be performed by the CPU, the burden on the CPU increases, and when the CM material is changed, there is a problem that it takes time to change the program.

Therefore, an object of the present invention is to form a control code as a user's bit in VITC that is reproduced integrally with a CM material when it is necessary to control the operation of an external device according to the CM material. It is an object of the present invention to provide a video signal reproducing apparatus which can control an external device simply and without mistake in correspondence with a CM material.

[Means for solving the problem]

The present invention relates to a reproducing means for reproducing a video signal comprising a plurality of programs from a magnetic tape, and a plurality of programs written in user bits of a time code inserted in a predetermined horizontal section in a vertical blanking period of the video signal. Information extraction means for extracting information related to the reproduction or transmission of each of the above, and external equipment to which the video signal reproduced by the reproduction means is supplied, controlling the external equipment based on the information extracted by the information extraction means Control signal supply means for supplying a control signal to be performed.

[Action]

Control information necessary for reproducing or transmitting the program is inserted in the vertical blanking period of the program such as the CM material. Therefore, the control information is reproduced at the same time when the program is reproduced. Therefore, according to the control information,
Direct control of audio signal playback mode, etc.
There is no problem that the burden on the user increases.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings.

FIGS. 1A and 1B show a tape format of one magnetic tape (referred to as a master tape) in which a plurality of CM materials are put together. FIGS. 1A and 1B show a continuous format divided.

This tape format includes a video signal area, a VITC area for recording material codes described later, an audio signal area for channels 1 to 4, and an LTC (longitudinal time code) for recording tape codes, stop codes, and the like. An area and a queue (CUE) area. The video signal area is formed as an oblique track, and VITC is repeatedly recorded in two predetermined horizontal sections in a vertical blanking period. These video signal area, audio signal area, LTC area, and cue area are formed as tracks in the longitudinal direction of the tape.

In the tape format, a header area is formed on the tape top (TAPE TOP) side, and, for example, a commercial frame (hereinafter abbreviated as a CM frame) area is sequentially formed from the tape top side to the tape end (TAPE END) side. Have been.

 The following signals are recorded in the header.

Video signal area: A color bar signal (CB) for a signal line check and a subsequent black burst signal (BB) are recorded. The boundary point between the color bar signal (CB) and the black burst signal (BB) is the stop position (STOP).
It has been.

VITC area: no recording audio signal area Channel 1: A 1 KHz test signal is recorded in the area corresponding to the color bar signal (CB), and no sound is recorded in the area corresponding to the black burst signal (BB).

Channel 2... No sound and a 1 KHz signal are recorded in the area corresponding to the color bar signal (CB), and no sound is recorded in the area corresponding to the black burst signal (BB).

Channel 3: silence Channel 4: silence LTC area: A longitudinal time code and LTC (for example, SMPTE time code) are continuously recorded. As the user's bits, a tape code, a code of the frame 1, and a stop code are recorded at the timing shown in FIG. 1 in an area corresponding to the color bar signal (CB).

Queue area: Not specified.

Each CM frame recorded and formed after the header is arranged at intervals of 4 seconds as shown in FIGS. 1A and 1B, and the tape top side and the tape end of each CM frame are arranged. On each side, a discard cut area for one second is set. The time addresses in the LTC area are continuous.

Then, as shown in FIGS. 1A and 1B, the area of each CM frame is formed from a single or a plurality of CM materials,
Each CM material has the tape format shown in FIG.

Video signal area: Discard cuts not broadcast on the tape top side, then the main part of the CM, then discard cuts, and black burst signals are sequentially recorded on the tape end side. The boundary between the discarded cut on the tape top side and the main part is the on-air start point (SOM). In addition, the boundary between the main story and the discarded cut at the rear is defined as the on-air end point (EOM).

VITC area: User code and material code are recorded.

User code: Recorded for 10 frames in the discard cut area on the tape top side and before reaching the above-mentioned on-air start point (SOM), and 30 frames (1) from the on-air start point (SOM) to the main program area Minutes) are recorded. The user code is not shown in FIG.

Since the data format of the user code is assumed to be completed in two frames as shown in FIG. 3, the data format is five times before the on-air start point (SOM) and 15 times after the on-air start point (SOM). Times will be recorded.

Material code ... This material code is the on-air start point (SO
It is recorded three times after the user code recorded after M).

Audio signal area Channel 1 ... A signal corresponding to the recorded CM is recorded. There is no sound in the area corresponding to the black burst signal in the CM frame.

Channel 2... A signal corresponding to the recorded CM is recorded. There is no sound in the area corresponding to the black burst signal in the CM frame.

Channel 3... A signal corresponding to the recorded CM is recorded. There is no sound in the area corresponding to the black burst signal in the CM frame.

Channel 4... A signal corresponding to the recorded CM is recorded. There is no sound in the area corresponding to the black burst signal in the CM frame.

LTC area: The code of the next CM frame is recorded two seconds before the end of the on-air (EOM) of the CM frame, and a stop code is recorded from the end of the on-air (EOM). Then, when all the CM frames have been completed, an end frame code and an end code are recorded.

Queue area: Not specified.

The data format of the user code will be described with reference to FIG.

As shown in FIG. 3A, the data format of the user code is composed of two frames, a first frame and a second frame. The user code is formed of four user bits UB1 to UB8 of VITC.

UB1 and UB2 of the first frame are used as start codes indicating the beginning of data, and FFH (H: hexadecimal notation) is recorded in UB1 and UB2.

A code type indicating the type of code is recorded in the first and second bits of UB3 of the first frame.

The third bit of UB3 of the first frame indicates whether the data is essential data or auxiliary data.

The essential data refers to data that is really needed by the control device, and the auxiliary data refers to additional data.

The fourth bit of UB3 of the first frame indicates the type of data (main or sub) in the code. By combining data types and code types,
The new data type is indicated.

Therefore, in the case of a control code, the third bit is essential data and the fourth bit is main.

UB4 of the first frame indicates a control code type, and defines the following bit pattern.

If the code type is not a control code, the control code type must be set to a non-control code. Use of "1111" as code type data is prohibited. Also, as shown in the user code column, when bit 7 is "1", the purpose of use of this code is released to the user.

UB5 and UB6 of the first frame indicate data serial numbers. The data serial number indicates a repetition number when recording is repeated a plurality of times. The basic format blocks (from the start code to the end gap) in each code are sequentially numbered, and the repetition numbers in the data blocks are shown. This is a serial number of the subtraction method, and the serial number in the last block is “0”. this is,
It is repeated for each write. The required data and auxiliary data have independent serial numbers.

A checksum is arranged in UB7 and UB8 of the first frame. This value is set so that the sum of all bytes (BYTE) from the code type data to before the end gap becomes zero.

4 in the first half (1st to 4th bits) of UB1 in the second frame
The bit is bitmap 1, and the latter half (fifth to eighth bits) is "0000". This bitmap 1 is
As shown in FIG. B, it is used as data in bit units, and data of each bit is defined as "1" for ON and "0" for OFF.

As an example of using the bitmap 1, for example, it is considered that the first bit is assigned to audio monaural, the second bit is assigned to audio stereo, and the third bit is assigned to audio bilingual.

4 of the first half (1st to 4th bits) of UB2 of the second frame
The bit is bitmap 2 and the latter half (fifth to eighth bits) is "0000". As with the bitmap 1, the purpose and mode of use of the bitmap 2 are released to the user. Therefore, by using the bitmaps 1 and 2 described above, it is possible to control the external device on a bit-by-bit basis.

Then, the user's bits of the bitmaps 1 and 2 are extracted in parallel, so that the control of the external device becomes
Made more effectively.

The 16 bits of UB5 to UB8 of the second frame are used as an end gap, and UB5 and UB6, UB7 and UB8 are
It is set to “00” H.

The tape code, frame code, and material code have basically the same format. That is, these codes
It is composed of five frames from a first frame to a fifth frame.

As one example, the data format of the material code is shown in FIG. User bits UB1, UB2 of the first frame
Is a start bit indicating the start of data, UB3 and UB4 are data for discrimination from a user code and the like, and UB5 and UB6 are data communication numbers. UB3 bit 0
And bit 1 are code types, and a tape code, a frame code, a material code, and a control code (stop code, user code, etc.) are distinguished by the code type. Bit 2 of UB3 is a data type, and is used to distinguish required data from auxiliary data. UB3 bit 3 is the main /
This is a bit for sub-identification. Data communication No.
In order to take measures against errors, the numbers indicate sequentially decreasing numbers when the same data is repeatedly recorded. Parity coding for error detection is performed on the codes of UB3, UB4, UB5, and UB6, and checksums are added as UB7 and UB8.

A code indicating the attribute of the material (title, sponsor ID code, etc.) is formed as three bits of the user bits UB1 and UB2 of the second frame, and two bits of UB3 are used as identification information for distinguishing the code to be used. A total of 6 bits, i.e., 2 bits of UB4 and 4 bits of UB4, are used as identification information of the number of bytes of the material ID. From the user bits UB5 of the second frame to all user bits of the third frame, all user bits of the fourth frame, and user bits UB1 and UB of the fifth frame
The material ID (12 bytes) is inserted into 2, UB3 and UB4. Material I
D is a character code representing material information (eg, ASII code, J
IS code, Shift JIS code, etc.). In the fifth frame, UB5, UB6, UB7, and UB8 have "FF" as an end gap.
H is inserted.

FIG. 5 shows the recording positions of the frame code and the stop code formed as the user's bits of the time code recorded in the LTC area in more detail. Here, the CM frame is the minimum unit of a video that is continuously reproduced. A plurality of CM frames are formed on the master tape. The material is a unit obtained by further dividing the CM frame, and indicates a program such as a program or a CM. The frame code is the frame information (frame I) related to the CM frame.
D, title, playback time, etc.) are formed in the user's bits of the longitudinal time code LTC.

As shown in FIG. 5, the n-th material CMn and (n + 1)
When the second material CMn + 1 continues, the frame code of the material CMn + 1 is recorded two seconds before the on-air end position EOM of CMn. The stop code is recorded four seconds before the on-air end position EOM of CMn (the broadcast start position of the next material CMn + 1). The stop code is a control code for transmission control. When the stop code is read, the reproduction operation of the VTR is stopped, and a standby state for reproducing the next CM frame and broadcasting.

An end frame code and an end code are recorded at a position where all the CM frames on one tape end, as shown in detail in FIG.

User code, stop code, end frame code,
The end code and the like are control codes, and their formats are basically the same. For example, the stop code is formed in LTC user bits UB1 to UB8 as shown in FIG. UB1 and UB2 are used as start codes. UB3
A code type, essential data / auxiliary data identification bits, and main / sub identification bits are inserted into UB4, and a control code type is inserted into UB4. The control code type is used for identifying the type of the control code. UB5 and UB6 are data communication Nos.
Parity coding for error detection is performed on the B4, UB5, and UB6 codes, and checksums are added as UB7 and UB8.

The end code has the same format as the above-mentioned stop code, as shown in FIG. However, the control code type indicates an end code. Further, although not shown, the end frame code has the same format except for a stop code, an end code, and a control code type.

These stop code, end code, and end frame code are recorded continuously 20 times. When the end code is detected, an 8-bit control signal of the user code is output.

The process of creating a master tape having the above-described tape format by editing the CM material will be described with reference to FIGS. 9 and 10.

In general, creating a master tape from CM material
It can be divided into a step of creating a material and a step of editing a plurality of CM materials to create a master tape. Hereinafter, each of them will be described.

FIG. 9 is a block diagram of a system for creating a CM material. In FIG. 9, 1 indicates a digital VTR.

The digital video signal and PCM audio signal supplied to the terminal 2 are supplied to a mix circuit 4 via an amplifier 3. On the other hand, the time address is supplied to the VITC generation circuit 7 via the terminal 5, and the user's bits forming the material code and the user code respectively are supplied via the terminal 6 to the VITC generation circuit 7.
It is supplied to the generation circuit 7.

The VITC output from the VITC generation circuit 7 is added to the digital video signal and the PCM audio signal by the mix circuit 4 and supplied to the digital VTR 1 via the amplifier 8 to be recorded on a magnetic tape. That is, the digital video signal is in the video signal area of the magnetic tape, the PCM audio signal is in the audio signal area, and the VITC (time code in which a user code or material code is formed as user bits) is in the VITC area (vertical blanking period). 12th and 14th horizontal sections).

This recording is performed in the discard cut area before the on-air start point (SOM) in the VITC area as shown in FIG. Thereby, the CM material is created.

FIG. 10 is a block diagram of a system when a plurality of CM materials are edited to create one master tape.

The editing device 10 creates one master tape from a plurality of CM materials.
Multiple digital VTRs that play back material CM1, CM2,…, CMn
1 _1, 1 _2, ..., and 1n, a digital VTR11 to create a master tape are connected.

The timing signal supplied from the timer circuit 12 is supplied to the above-described editing device 10 and the LTC generation circuit 13. This timing signal controls the operations of the editing device 10 and the LTC generation circuit 13. The plurality of VTRs 11 ₁ , 1 ₂ ,..., 1 n are remotely controlled by a control signal supplied from the editing device 10 to reproduce the magnetic tape on which the plurality of CM materials CM 1, CM 2,. Is done.

The reproduced digital video signal and PCM audio signal are transmitted from the editing apparatus 10 at a predetermined timing to the digital VT signal.
Supplied to R11. On the other hand, in the LTC generation circuit 13, the time code supplied from the terminal 15 and the user's bit supplied from the terminal 14 are combined, and the LTC code to be recorded in the LTC area
Is formed, and this LTC is supplied to the digital VTR 11.

In VTR11, the digital video signal is in the video signal area of the magnetic tape, the PCM audio signal is in the audio signal area, and the LTC, that is, the tape code, frame code, stop code, etc. Recorded in the area. As a result, a master tape is created.

When the tape format shown in FIG. 1 is reproduced as described above and a CM is transmitted, external devices can be controlled based on the user code. FIG. 11 is a block diagram of a system for reproducing a master tape.

The video signal of the master tape and the PCM audio signal reproduced by the digital VTR 11 are supplied to the transmitter 20.

Also, the video signal of the reproduced master tape and the LTC
Is supplied to the interface box 21. The interface box 21 is provided with an LTC reader for reading LTC and a VITC reader for reading VITC, and reads a time address, user's bits, and the like. Then, based on the time code, a control signal defined by the detected user's bit is supplied to the external device such as the transmitter 20, the telecine 22, and the like.

When the above-described control signal is supplied to the transmitter 20, for example,
The sound is controlled to be monaural, stereo, or the like, after which predetermined signal processing is performed and transmitted from the antenna 23.

In addition, a video signal reproduced from the master tape, a frame code, a character, a symbol, etc. inserted in a material code, etc. are superimposed on the monitor television 24 from the interface box 21 to the monitor television 24. Video signal is supplied, and a monitor image is displayed.

Based on the user code from the interface box 21, the external device, for example, the transmitter 20, the telecine 22 by being triggered at a desired timing,
Control based on the user code is performed. As a result, the control of the external device, which has been conventionally centrally managed by the host computer, is now managed in a distributed manner, and the burden on the host computer can be reduced.

With reference to FIG. 12 and FIG. 13, display on the monitor television at the time of CM transmission will be described. When the master tape is as shown in Fig. 12, the LTC
When playing back the tape code recorded in the area,
A screen corresponding to the tape code as shown in FIG. A is displayed on the monitor television 24.

Next, when the first CM material is transmitted, the VITC user's bit material code is read, and the frame code is read.The material ID based on the material code, the frame ID based on the frame code, the frame title, and the LTC The screen shown in FIG. 13B with the reproduction time code is displayed on the monitor television 24. In this case, when the transmission of the CM material is completed and the stop code is detected, the VTR playback operation is stopped, and at the same time, a black mat is added to the display character of the frame ID of the screen shown in FIG. 13B. , The display characters are reversed. As a result, it is understood that the transmission of the corresponding CM material has been completed and that the transmission of the next CM material is in a standby state.

Further, when the transmission of all the CM frames recorded on the tape is completed and the end code is detected, a screen shown in FIG. 13C is displayed on the monitor television 24, and the transmission of the CM material of the master tape is performed. You can know the end of.

〔The invention's effect〕

According to the present invention, control information necessary for sending and reproducing a program such as a CM material is recorded as VITC of the program, so that the control information is reproduced simultaneously with the program.
Therefore, there is an advantage that the external device can be controlled to perform a desired operation without burdening the UPU.

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing a tape format of a master tape used in one embodiment of the present invention, FIG. 2 is a schematic diagram showing a recording position of a user code and a material code, and FIG. FIG. 4 is a schematic diagram showing a data format of a material code, FIG. 5 is a schematic diagram showing a recording position of a stop code, and FIG. 6 is a recording of an end frame code and an end code. FIG. 7 is a schematic diagram showing a data format of a stop code, FIG. 8 is a schematic diagram showing a data format of an end code, and FIG. 9 is a configuration for creating a CM material. FIG. 10 is a block diagram showing a configuration for creating a master tape, and FIG. 11 is a CM diagram.
FIG. 12 is a schematic diagram showing an outline of a master tape, and FIG. 13 is a schematic diagram showing a display screen of a monitor television at the time of CM transmission. Explanation of main symbols in drawings 1: Digital VTR for creating and reproducing CM material, 7: VITC generation circuit, 11: Digital VTR for creating and reproducing master tape, 20: for broadcasting reproduced CM material Transmitter, 21: interface box.

Claims (1)

(57) [Claims] 1. A reproducing means for reproducing a video signal comprising a plurality of programs from a magnetic tape; Information extraction means for extracting information relating to the reproduction or transmission of each of the plurality of programs; and an external device to which the video signal reproduced by the reproduction means is supplied. And a control signal supply means for supplying a control signal for controlling the external device based on the information.