JP2000184280A - Television program production system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To automatically supply video signals accurately synchronously with each other to video effect devices of each production system without the need for a manual operation. SOLUTION: A plurality of production systems each having video effect devices 6, 7 process a video signal outputted from a base resource device 2 in parallel and video signals outputted from the video effect devices 6, 7 are sequentially selected to produce a program. The subject system is provided with a phase matching section 5 that synchronizes the video signals received by the video effect devices 6, 7.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a television program production system, and more particularly, to a program production system for processing a video output from a material device by a plurality of production systems.

[0002]

2. Description of the Related Art A program for processing a video output from a material device in parallel by a plurality of production systems each having a video effect device, and sequentially selecting video signals output from the video effect device to produce a program. In the production system, it is necessary that the video signal output from each video effect device is synchronized at the time of selecting the video signal. In this type of conventional program production system, the phase of a video signal supplied to each production system is varied in a material device so that the video signal can be synchronized according to the selection state of the video signal.

[0003]

However, this phase adjustment is a complicated operation that requires human labor, and the adjustment range is limited by the type and specification of the material device, so that sufficient adjustment cannot be performed. There was a problem.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and it is possible to automatically and accurately supply a synchronized video signal to a video effect device of each production system without requiring any manual operation. It aims to provide a possible program production system.

[0005]

In order to achieve the above object, according to the present invention, a video signal output from a material device is processed in parallel by a plurality of production systems each having a video effect device, and each video signal is processed. In a program production system for sequentially selecting video signals output from an effect device to produce a program,
Means is provided that includes a phase adjustment unit that synchronizes a video signal input to each video effect device.

In the above means, the phase adjustment unit may be
A synchronization signal extraction circuit that extracts a synchronization signal from a video signal of a material device, a phase comparison circuit that compares the phase of the synchronization signal and a reference signal, and outputs the phase difference information, and performs phase control based on the phase difference information. And a synchronizing circuit for shifting the phase of the video signal of the material device based on the advance synchronizing signal.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of a program production system according to the present invention will be described with reference to the drawings.

FIG. 1 is a system configuration diagram of the present embodiment. In this figure, reference numeral 1 denotes a signal generator, 2 denotes a material device, 3 denotes a converter, 4 denotes a switch, 5 denotes a phase adjuster, 6, 7
Denotes a video effect device, 8 denotes a distribution input line, and 9 denotes a control unit.
The signal generator 1 supplies a reference signal having a reference phase “0” to the phase adjustment unit 5. The material device 2 supplies an analog video signal to the converter 3 and a digital video signal D2 to the phase adjustment unit 5.

The converter 3 converts the analog video signal input from the material device 2 into a digital video signal by A / D conversion so as to be in the signal form of the production system 1, and further converts the analog video signal into a digital video signal by phase conversion. This is supplied to the unit 5. The switching unit 4 selects one of the digital video signal D1 output from the converter 3 and the digital video signal D2 output from the material device 2, and supplies the digital video signal D2 to the phase adjustment unit 5.

[0010] The phase adjusting unit 5 is a digital video signal D which is alternatively input to the reference signal input from the signal generator 1.
1 or digitally synchronizes the phase of the digital video signal D2. When the digital video signal D1 is input, the digital video signal D1 is output to the video effect device 6 in synchronization with the reference signal. When the signal D2 is input, the digital video signal D2 is output to the video effect device 7 in synchronization with the reference signal.

FIG. 2 is a block diagram showing a detailed configuration of the phase adjusting section 5. As shown in FIG. As shown in the figure, the phase adjustment unit 5 includes a synchronization signal extraction circuit 10, a phase comparison circuit 11, a phase control circuit 12 (advance synchronization signal generation unit), a signal generation circuit 13 (advance synchronization signal generation unit), Circuit 14
It is composed of The synchronization signal extraction circuit 10 outputs the digital video signal (D1 or D1) output from the switch 4
The synchronization signal is extracted from 2) and output to the phase comparison circuit 11.

The phase comparison circuit 11 includes a synchronization signal extraction circuit 1
It compares the phase of the reference signal with the synchronization signal input from 0, and outputs the phase difference information 11a to the phase control circuit 12. The phase control circuit 12 converts the phase difference information 11a into a phase control signal 12a for controlling the signal generation circuit 13, and outputs the same to the signal generation circuit 13. The signal generation circuit 13 outputs the phase control signal 12a
Advance synchronization signal 1 whose phase is advanced by
3a is output to the synchronization circuit 14.

The synchronizing circuit 14 synchronizes the phases of the digital video signals D1 and D2 with the reference signal based on the advance synchronizing signal 13a and outputs them to the video effect devices 6 and 7. That is, the phase adjuster 5 synchronizes the digital video signal D1 input to the input terminal with the reference signal, outputs the digital video signal D2 input to the input terminal ′ to the video effect device 6, and synchronizes the digital video signal D2 input to the input terminal ′ with the reference signal. Output from the output end ′ to the video effect device 7 in synchronization with. Therefore, the digital video signal D1 and the digital video signal D2 are in a synchronized state.

The video effect device 6 belongs to the production system 1, and performs a special effect process on the digital video signal output from the phase adjustment unit 5 and outputs the digital video signal to the distribution input column 8. On the other hand, the video effect device 7 belongs to the production system 2, and performs a special effect process on the digital video signal output from the phase adjustment unit 5 and outputs the digital video signal to the distribution input sequence 8.

The distribution input column 8 selects one of the digital video signals input from each of the video effect devices 5 and 6 based on a control signal supplied from the outside, and sends the digital video signal to a transmission system (not shown) at a subsequent stage. In addition to the supply, the on-air tally signal S corresponding to the control signal is output to the control unit 9. Also,
The control unit 9 outputs a switching control signal to the switching unit 4 based on the on-air tally signal S.

Next, the operation of this embodiment will be described. First, when an output signal of the production system 1, that is, an output signal of the video effect device 6 is selected for transmission in the distribution input line 8 by an external operation, a tally signal 8 a indicating this is transmitted from the distribution input line 8 to the control unit 9. Supplied to

As a result, a control signal is supplied from the control unit 9 to the switching unit 4 to instruct that the digital video signal D 1 of the production system 1 be selected and output to the phase adjustment unit 5. As a result, the input of the switch 4 is switched to the A side, and the digital video signal D
1 is entered. In parallel with this, the phase adjustment unit 5
A reference signal is inputted to an input terminal of the digital camera, and a digital video signal D1 relating to the production system 1 is inputted to an input terminal thereof.
The digital video signal D2 related to the production system 2 is input to the input terminal '.

Here, a delay amount (α + β) obtained by adding the delay amount (α) in the converter 4 of the production system 1 and the delay amount (β) of the material device 2 is advanced with respect to the phase of the reference signal. That is, the advance synchronization signal 13a whose phase matches the reference signal is output from the signal generation circuit 13 to the synchronization circuit 1
4 is supplied. As a result, the analog video signal output from the material device 2 has a phase of −
The phase is advanced by (α + β) and becomes a phase synchronized with the reference signal.

On the other hand, when the production system 2 is selected in the distribution input column 8, a tally signal 8a is supplied to the control unit 9,
The control unit 9 outputs a control signal for switching the switch 3 to the B side. In this case, the digital video signal D2 having the delay amount (β)
Is supplied to the phase adjuster 5, and the digital video signal D2 supplied to the input terminal ′ has a phase of −
The phase is advanced by (β) and becomes a phase synchronized with the reference signal.

As described above, according to this embodiment, regardless of which of the production systems 1 and 2 is selected, regardless of the delay amount (β) of the material device 2 and the delay amount (α) of the converter 4, the automatic The phases of the digital video signals D1 and D2 are advanced and accurately synchronized with the reference signal. Therefore, it is possible to eliminate a problem such as transmission failure due to the synchronization of the digital video signals D1 and D2 supplied from the respective production systems in the transmission system at the subsequent stage.

[0021]

As described above, according to the program production system according to the present invention, video signals output from material devices are processed in parallel by a plurality of production systems each having a video effect device, and each video signal is processed. In a program production system for sequentially selecting video signals output from an effect device and producing a program, a phase adjustment unit that synchronizes the video signal input to each video effect device is provided, so that the video signal is input to each video effect device. Video signals can be synchronized automatically and accurately. Therefore, for example, it is possible to eliminate the occurrence of a problem such as a transmission failure that occurs in the transmission system at the subsequent stage.

[Brief description of the drawings]

FIG. 1 is a system configuration diagram showing a functional configuration of an embodiment of the present invention.

FIG. 2 is a block diagram illustrating a detailed configuration of a phase adjustment unit according to the embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Signal generator 2 ... Material equipment 3 ... Converter 4 ... Switch 5 ... Phase adjustment unit 6 ... Video effect device 7 ... Video effect device 8 ... Distribution input sequence 9 ... Control unit Reference Signs List 10 synchronization signal extraction circuit 11 phase comparison circuit 12 phase control circuit (advance synchronization signal generation unit) 13 signal generation circuit (advance synchronization signal generation unit) 14 synchronization circuit

Claims (2)

[Claims] 1. A video signal output from a material device is processed in parallel by a plurality of production systems each having a video effect device, and a video signal output from each video effect device is sequentially selected to produce a program. A television program production system comprising: a phase adjustment unit that synchronizes a video signal input to each of the video effect devices. 2. A phase adjusting section comprising: a synchronizing signal extracting circuit for extracting a synchronizing signal from a video signal of a material device; and a phase comparing circuit for comparing the phase of the synchronizing signal and a reference signal and outputting the phase difference information. An advanced synchronization signal generating unit that generates an advanced synchronization signal whose phase is controlled based on the phase difference information; and a synchronization circuit that shifts the phase of the video signal of the material device based on the advanced synchronization signal. 2. The television program production system according to claim 1, wherein: