JPH1023299A - Television program production device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To allow the device to quickly cope with a system change by providing a video image phase adjustment means, providing a delay to an output of an output changeover device and providing an output and controlling the means, based on a phase difference between the output and a reference synchronizing signal. SOLUTION: A reference synchronizing signal 1 is fed from a main adjustment installation to a signal generator 2. In the case that an output changeover device 7 selects an output (cross point A) of a video effect device 5, a relation of phase between a next output 11 of the video effect device 5, and the reference synchronizing signal 1 is detected in advance by a comparison section 8 and its delay (phase difference) data signal 12 is given to a control section 9. As a result, a video signal output phase of the program production device from the video effect device 5 is corrected to be a phase (reference phase) of the reference synchronizing signal 1 automatically at all times, and the phase correction is controlled (phase adjustment) in a video source changeover timing of the video effect device 5 to avoid production of a shock at changeover of video sources.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a television program producing apparatus, and more particularly to a video signal phase adjusting method for a television program producing apparatus.

[0002]

2. Description of the Related Art In a program production and transmission (broadcast) system of a television broadcasting station, it is necessary to manage and adjust the phase relationship of all video signals. There are many video signal generation devices in the system, for example, camera devices, recording / playback devices (VTRs and video disk recorders), telecine devices (film camera devices, slide / telop projectors), flying spot scanners, etc.
There are other video effect devices and video switching devices, as well as network stations and FPUs (field pickups).
There is a video signal or the like transmitted through a device or a communication satellite, and it is not so easy to control and manage the phase relationship between the video signals.

Conventionally, in a program production apparatus, the video signal phase of each system of various material devices (video signal generation devices) is not constant, and if necessary, for example, a synchronization circuit / delay circuit is inserted, or a phase delay or fluctuation is caused. In such a manner, the phase variation of each system is corrected by a method of adjusting the phase of a reference phase signal supplied to a material device, a video effect device, or the like having a large size.

FIG. 2 shows the configuration of a program production apparatus in this case. Main adjustment equipment for signal generator 2 (video switcher (master switcher for generating and monitoring broadcast station output signals)
(In-station) reference synchronization signal 1 is supplied from the equipment, and the signal generator 2 synchronizes the reference synchronization signal 1 including the color subcarrier phase (the synchronization signal phase is adjustable). (Including the color sub-carrier) 3. By supplying the synchronization signal 3 to all devices in the program production device, all video signals in the program production device can be synchronized with the intra-station reference synchronization signal 1 (this is called synchronous coupling). .

[0005] The material devices 4-1 to n generate (reproduce) video (signal) materials necessary for program production and supply them to the video effect device 5 and the video switching device 6. Video effect device 5
Is a device for giving a special effect (such as attaching another video signal to a surface on a cylindrical shape) to an input video signal, and has a delay amount of, for example, + α.

On the other hand, the video switch 6 has a function of switching video signals, a function of fading in and out of video signals, and a function of wiping two video signals. It is slight. Therefore, a fixed delay circuit (delay amount + α) 8 is provided at the output of the video switch 6 to match the video signal phases at the cross points A and B of the output switch 7.

In this case, if the phase of the synchronizing signal 3 is advanced by -α compared to the reference synchronizing signal 1, the output of the output switch 7 matches the phase of the reference synchronizing signal 1, and the output of the output switch 7 is When sent to the main adjustment facility, the phase of the video signal matches that of the other video signals of the main adjustment facility, which is convenient.

[0008]

In the case of the program production apparatus shown in FIG. 2, for example, even when the system in the apparatus is slightly changed for the sake of the program, it is necessary to consider the phase relationship of the video signal each time. However, there is a problem that it is not possible to quickly respond to a system change.

An object of the present invention is to provide a program production apparatus capable of promptly responding to a system change.

[0010]

According to the present invention, a plurality of material devices, a video effect device, a video switching device, an output switching device, and a second synchronization device synchronized with a first synchronization signal serving as a reference in a television broadcasting station are provided. Means for generating a second synchronization signal, the material device, the video effect device,
And a means for supplying to the video switching device, a television program production device, a video phase adjustment means for sending the output of the output switching device with a delay, the video effect device, the video switching device, and A video phase control means for detecting a phase difference between an output video signal of a material device and the first synchronization signal to control the video phase adjustment means.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The operation of the present invention is as follows.
The automatic phase adjuster 10 is inserted into the output of the output switch 7, and the video signal phase at the cross points A to C of the output switch 7 is compared with the reference synchronizing signal 1 using the delay amount data 12 obtained by phase comparison 8. , The controller 9 controls the automatic phase adjuster 10 in the form of a correction control signal 13.

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

FIG. 1 is a block diagram showing the configuration of an embodiment of a program production apparatus according to the present invention, and the same parts as those in FIG. 2 are denoted by the same reference numerals. In addition, overlapping description is omitted.

In FIG. 1, a signal generator 2 is supplied with an (in-station) reference synchronizing signal 1 from the main adjusting equipment, and a synchronizing signal in the system output from the signal generator 2 (necessary from the reference synchronizing signal 1). 3) is supplied to each device in the program production device, whereby the signal between the (in-station) reference synchronization signal 1 from the main adjustment facility and each video signal in the program production device is transmitted. Synchronous coupling is established.

When the output (cross point A) of the video effect device 5 is selected by the output switch 7, the next output of the video effect device 5 (“Next” in the sense of the signal next to the currently transmitted signal) is set in advance. "
In this case, the phase relationship between the signal 11 to be taken by the output switch 7 and the reference synchronizing signal 1 is detected by the comparing unit 8, and the delay amount (phase difference) data signal 12 is transmitted to the control unit 9. Is done.

The control section 9 controls the automatic phase adjuster 10 with the correction control signal 13. The correction control signal 13 includes:
A material switching timing signal 14 of the video effect device 5 is also included.

As a result, the video signal output phase of the program production device from the video effect device 5 is always automatically corrected to the phase of the reference synchronizing signal 1 (reference phase).
Correction control (phase adjustment) at the video material switching timing
By doing so, no shock occurs when switching the video material.

The output switch 7 outputs the output (cross point B) of the video switch 6 or the material device 4
When the output of -n (cross point C) is selected,
The comparison section 8 detects the phase relationship between the phase of the signal reaching the cross point B or C of the output switch 7 and the reference synchronization signal 1, and outputs the delay data signal 12 to the control section 9.
Is transmitted to

In this case, since the delay amount is usually 0, the signal reaching the cross point B or C is the synchronization signal 3
, And the phase is advanced by a fixed amount from the reference synchronization signal 1. The control unit 9 controls the automatic phase adjuster 10 with the correction control signal 13 so that the video signal is delayed by the automatic phase adjuster 10 by the fixed amount of phase lead.

Even when the material devices 4-1 to n have a delay amount, similarly, the delay amount data signal 12 from the comparing unit 8 is transmitted to the control unit 9, and the delay amount data signal 12 is automatically transmitted by the correction control signal 13 from the control unit 9. By controlling the phase shifter 10, the video signal output of the program production device can always be adjusted to the reference phase.

[0021]

As described above, according to the present invention, the phase of the output video signal of the program production apparatus is always adjusted to the reference phase even if the system of the internal components of the program production apparatus such as material equipment is changed. Has the effect.

[Brief description of the drawings]

FIG. 1 is a block diagram of an embodiment of the present invention.

FIG. 2 is a block diagram showing an example of a conventional program production device.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 reference synchronization signal 2 signal generator 3 synchronization signal 4-1 to n material device 5 video effect device 6 video switch 7 output switch 8 comparison unit 9 control unit 10 automatic phase shifter 11 next output 12 delay amount data 13 correction Control signal 14 Material switching timing signal

Claims (2)

[Claims] 1. A plurality of material devices, a video effect device, a video switch, an output switch, and a second synchronizing signal synchronized with a first synchronizing signal serving as a reference in a television broadcasting station. And a means for supplying the second synchronizing signal to the material device, the video effect device, and the video switching device, wherein the television program production device provides a delay to an output of the output switching device. Video phase adjusting means for transmitting the video signal, and controlling the video phase adjusting means by detecting a phase difference between an output video signal of the video effect device, the video switching device, and the material device and the first synchronization signal. A program production apparatus comprising: a video phase control unit. 2. The program production apparatus according to claim 1, wherein the phase of the second synchronization signal is advanced by a fixed amount compared to the phase of the first synchronization signal.