JPS647433B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention stores commercial broadcast material for television broadcasting in advance on a video tape, searches for the starting point of the required broadcast material from the stored video tape, and then play it,
Regarding a videotape editing device that simultaneously records the aforementioned playback signals in the order of broadcast on another videotape recorder (VTR), especially a VTR for multiple material files.
(MFVTR).

Conventionally, this type of videotape editing device reads the address signal recorded on the source videotape in advance, calculates the difference between the address signal and the tape address to be searched, and locates the desired location on the VTR tape. Reading of the address signal, arithmetic processing and VTR for accurate searching in a short time
The number of control devices (automatic VTR tape address search devices) required to output control signals to the VTRs was equal to the number of VTRs. The VTR tape address automatic search device is able to quickly and accurately tape the tape because the running speed and inertia of the tape during fast forwarding and unwinding vary depending on the diameter of the VTR's tape take-up reel and the amount of tape wound on the reel. It requires complicated control to stop at the desired position and is quite expensive. Therefore, in a device with a large number of VTRs, the same number of VTR tape address automatic search devices are required, resulting in a disadvantage that the amount of investment for equipment becomes enormous.

The purpose of the present invention is to search for tape addresses, etc.
By ensuring that the VTR tape address automatic search device is connected to a specified VTR only for the period necessary to control the VTR, the VTR tape address automatic search device can be used to control VTRs even if the number of VTRs increases. It is an object of the present invention to provide a video tape recorder editing device capable of editing, for example, one commercial without increasing the number of commercials.

According to the present invention, there is provided a signal line for supplying an address signal on a video tape generated by VTR playback to an automatic VTR tape address search device;
Connect all the control signals from the VTR tape address automatic search device to the VTR.
means for simultaneously switching and connecting one VTR among the VTRs; means for generating a completion signal when all controls for the connected VTR are completed; and means for automatically controlling the VTR tape address search device based on the completion signal. A videotape editing apparatus is obtained which includes means for switching the input/output signal line to another VTR.

The object of the present invention is to simultaneously switch all signal lines and control lines connecting the VTR tape address automatic search device and the VTR in order to control a plurality of VTRs with one VTR tape address automatic search device.
Connect to a VTR, output the necessary control, and
Control the VTR, and after the control is completed, switch the VTR tape address automatic search device to another VTR,
It performs necessary control and processes in a time-division manner.

The invention will now be described in detail with reference to drawings of embodiments of the invention. In the drawing, 1 is the central processing unit (CPU), 2 to 4 are VTR tape address automatic search devices, 5 is a switch, and 6 to 8 are for material files.
VTR 9 indicates a recording VTR. Also the signal line
a ₁ to _{a 3} are a group of signal lines sent from the CPU 1 to the automatic search device 2, 3, or 4, and signal lines b ₁ to _{b 3}
is a VTR control operation completion signal line sent from the automatic search device 2, 3 or 4 to the CPU 1.
d ₁ to d ₃ and f ₁ to _{f 4} are automatic search devices, 2, 3, or 4 for tape address signals generated from VTR playback.
This is a signal line for passing to. c ₁ to _{c 3} and
e ₁ to _{e 4} are the control outputs of automatic search devices 2, 3, and 4.
A group of control signal lines for connecting to VTRs 6 to 9 is shown. g indicates a group of control signal lines for controlling the switch 5. In the figure, the switch 5 is activated by a control signal output from the CPU 1 and connected via the line g, and the input/output lines c ₁ ,
d ₁ is connected to input/output lines e ₃ and f ₃ of the VTR 8.
Similarly, the search device 3 is connected to the VTR 7, and the search device 4 is connected to the VTR 7.
Assume that each is connected to the input and output lines of VTR6. Here, search device 2 is sent from CPU 1 via a ₁ .
The address to be searched for on the tape is output. The search device 2 receives the search address and sends a line.
A signal for play control is output to the VTR 8 via the switch _c1 and the line _e3 . VTR
8 receives the play control signal and starts playing f ₃
A tape address signal is generated while the tape is currently running.
The search device 2 receives the generated address signal via the line f ₃ , the switch 5, and the line d ₁ , compares the search address signal with the generated address signal, and if there is a difference, sends the generated address signal to the VTR 8 in the shortest possible time. A control signal is output so that the tape address reaches the desired location. Search device 2 has line f ₃ , switch 5 has line d ₁ ,
It constantly monitors the playback address of the VTR 8 via the VTR 8, calculates the difference from the search address, outputs a control signal based on the calculation result to the VTR 8, and finally confirms the target address. Here, the search device 2 is
Outputs a stop signal to the VTR8 via c ₁ and e ₃ ,
Complete control of VTR8. The search device 2 communicates this completed result to the CPU ₁ via line b1. The CPU 1 receives the completion signal and records the output signal from the VTR 8 at a predetermined address in the recording VTR 9. When recording is finished, the CPU 1 then controls the VTR, if any, that requires control. Also, when the connection of the search device 2 changes, the connection is switched in the switch 5 via the line g and the connection is changed to a predetermined one.
Switch to VTR. Since both search devices 3 and 4 operate in the same way as search device 2, a description thereof will be omitted.

In this embodiment, VTR tape address search has been described, but since it can be easily determined that playback or recording during a predetermined period can be processed in the same way, the explanation will be omitted. Furthermore, in this embodiment, the recording VTR is also connected to the search device through a switching device, but it goes without saying that it may be connected to the CPU independently without using a switching device.

As explained above, the present invention applies to all VTRs.
By providing a switch that can connect one of the automatic tape address search devices to one of all VTRs, and a means for connecting the VTR operation completion signal to the upper control unit, it is possible to reduce the number of VTR search devices (control devices). )
This makes it possible to control many VCRs, reducing the cost of the equipment.

[Brief explanation of the drawing]

The drawing is a system diagram showing one embodiment of the present invention. In the figure, 1... central processing unit, 2, 3, 4
...VTR tape address automatic search device, 5...
Switcher, 6, 7...9...VTR, a...Control signal line group, b...Completion transmission signal line, c...VTR
Control signal group, e... VTR control signal line group, d...
Address signal line, f... Address signal line, g...
Switcher control signal line group.

Claims (1)

[Claims] 1. A plurality of video tape recorders that play back magnetic tapes that record material to be recorded, and a plurality of video tape recorders that control the video tape recorders by searching for address signals on the video tapes and stop the video tape recorders at predetermined address points. at least one automatic address search means smaller than the number of automatic address search means, a switch for associating the video tape recorder with the automatic address search means, and designating a predetermined video tape radar and a predetermined address to the automatic address search means. and a central processing unit that controls switching in the switching device based on the designation to control sequence operations of the plurality of video tape recorders, and a recording video tape recorder that records playback output from the plurality of video tape recorders. A videotape editing device comprising: