JPH11275403A - Television camera system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a regular aspect ratio to a video image of a valid image part of a view finder by replacing a deflection output of the view finder with a deflection output of a television system of a return (RET) signal automatically so as to obtain the video image of the valid image with an aspect ratio specified by a television system (TV system) of the return video signal (RET signal) received by the television camera system. SOLUTION: The system is provided with a TV system storage circuit 3 that stores information of plural TV systems, detects a TV system of a received video signal and outputs a TV system detection signal, a horizontal deflection size changeover circuit 4 that outputs a required horizontal deflection voltage corresponding to the detected TV system, and a vertical deflection size changeover circuit 6 that outputs a required deflection voltage. Then the camera system displays a video image with a prescribed TV system that is deflected by a required horizontal deflection voltage and a required vertical deflection voltage and has a valid image part having an effective image part with an aspect ratio of the received TV system and is converted by a television signal system converter 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a television camera device having a television signal format converter and capable of displaying a plurality of television system return video signals (hereinafter referred to as RET signals) on a viewfinder, and more particularly to a television camera device. A view that automatically switches the screen deflection size in response to the input RET signal after format conversion, and displays the screen of the effective image section with a normal aspect ratio (the ratio of the horizontal to vertical length of the screen). The present invention relates to a television camera device having a finder.

[0002]

2. Description of the Related Art Generally, a television camera apparatus captures an image of a subject while displaying an image of the subject being captured by the television camera apparatus on a viewfinder provided in a camera head. Thus, an image from another television camera device or the like, which is input to the viewfinder as a RET signal, can also be displayed. By the way, as is well known, a video screen imaged by a television camera device is:
It has a predetermined aspect ratio and is composed of a predetermined number of scanning lines, and the aspect ratio and the number of scanning lines differ depending on the television system. In this television system, an aspect ratio of a video screen is 4: 3 as a standard system.
And the number of scanning lines is 525 (the number of effective scanning lines constituting the effective image portion is 483).
stem committee) system, which has been used in the past (PAL system, SECAM as other standard systems)
TV systems adopted by different countries are different), and as an improved television system, the NTSC 16: 9 system with an aspect ratio of 16: 9 and a wide screen, and the aspect ratio are 16: 9
And the number of scanning lines is 1125 (the number of effective scanning lines is 1035)
HDTV (High Definition Tele)
vision) system and progressive (sequential scanning) system, which are used according to the purpose.

As described above, since the aspect ratio and the number of scanning lines are different depending on the television system, a television camera device using the television system (A) is provided with the same television system, for example, an RET signal (A). ) Is input to the viewfinder, the RET signal (A)
Can be displayed, but when, for example, an RET signal (B) of another television system (B) is input, a video screen of a different RET signal (B) of this television system is displayed. I can't. However, when a plurality of television system video camera devices as described above are used and a plurality of television system images are used, the plurality of television system images are input to the viewfinder as RET signals. Then, there is a demand for displaying any video of the television system on the viewfinder. In order to respond to this demand, a television camera device, for example, a camera control unit (CCU) is provided with a television signal format conversion device capable of converting a video signal into a television format. Even if an RET signal of a television system different from the television system set in the apparatus is input, the RET signal is converted into a RET signal of the set television system, and the converted RET signal is input to a viewfinder. The video screen can be displayed.

FIG. 2 shows an example of a block diagram mainly showing a viewfinder portion of a television camera device provided with a television signal format converter according to the prior art. In FIG. 2, reference numeral 28 denotes a RET signal input terminal, 22 denotes a television system of the input RET signal, and R denotes a television system set in the television camera device.
A television signal format converter for converting and outputting an ET signal, 21 is a CRT of a view finder for displaying a video screen of an input RET signal, and 23 is a synchronizing signal from the RET signal output from the television signal format converter 22. A synchronizing signal separating circuit 24 for separating signals and outputting a horizontal synchronizing signal and a vertical synchronizing signal;
A horizontal deflection voltage circuit 25 for generating and outputting a horizontal deflection voltage according to the horizontal synchronization signal input from the horizontal deflection voltage circuit 25; a horizontal deflection output circuit for amplifying the horizontal deflection voltage input from the horizontal deflection voltage circuit 24 and outputting the amplified voltage to the horizontal deflection circuit; Reference numeral 26 denotes a vertical deflection voltage circuit which generates and outputs a vertical deflection voltage based on the vertical synchronization signal input from the synchronization signal separation circuit 23, and 27 amplifies the vertical deflection voltage input from the vertical deflection voltage circuit 26 and amplifies the vertical deflection voltage. Is a vertical deflection output circuit that outputs the signal to

Here, the television camera device is an HD
The HDTV RET signal set in the TV system and converted from the television signal system converter is output to the CRT 21 of the viewfinder, and the video screen displayed on the CRT 21 of the viewfinder is H
It is assumed that the outputs of the horizontal deflection output circuit 25 and the vertical deflection output circuit 27 are set so as to display the screen of the effective image portion having the deflection size specified by the DTV method.
Therefore, when, for example, an RET signal of the HDTV system is input to the RET signal input terminal 28 of the television camera device, the RET signal output from the television signal format converter 22 is converted and set. An RET signal of the HDTV system of the same system is output to the CRT 21 and the synchronizing signal separation circuit 23.

[0006] The synchronization signal separating circuit 23 receives the input HD signal.
The horizontal synchronization signal and the vertical synchronization signal are separated from the RET signal of the TV system, and the horizontal synchronization signal is supplied to the horizontal deflection voltage circuit 24.
The vertical synchronization signal is output to the vertical deflection voltage circuit 26. The horizontal deflection voltage circuit 24 and the vertical deflection voltage circuit 26 generate horizontal and vertical deflection voltages of required levels for displaying a screen of an effective image portion having a deflection size specified by the HDTV method on the cathode ray tube 21. Then, the signals are output to the horizontal deflection output circuit 25 and the vertical deflection output circuit 27. The horizontal deflection output circuit 25 and the vertical deflection output circuit 27 amplify the input required horizontal deflection voltage and vertical deflection voltage, and supply the amplified horizontal deflection output and vertical deflection output to the horizontal deflection circuit and the vertical deflection circuit, respectively. Output, CRT 2
1 displays a screen of an effective image portion having a deflection size defined by the HDTV system. In this case, the deflection size is set so that the screen displayed on the cathode ray tube 21 of the viewfinder displays the screen of the effective image portion based on the HDTV system image. Therefore, the effective image portion having the aspect ratio of 16: 9 is set. Is displayed, and there is no problem at all.

Next, the RET of the television camera device
The signal input terminal 28 is connected to, for example, an NT having an aspect ratio of 4: 3.
When the SC RET signal is input, the RET signal output from the television signal format converter 22 is format-converted and becomes the set HDTV RET signal, and the CRT 21 and the synchronization signal separation circuit 23 Output to In this case, the horizontal synchronizing signal and the vertical synchronizing signal are separated by the synchronizing signal separating circuit 23 and the horizontal deflection output circuit 25 is separated.
The vertical deflection output circuit 27 outputs a horizontal deflection output and a vertical deflection output from the vertical deflection output circuit 27 to the horizontal deflection circuit and the vertical deflection circuit, and outputs the effective image area of the deflection size prescribed by the HDTV method on the CRT 21 of the viewfinder. Displaying the screen is the same as when the HDTV RET signal is input.

As described above, since the deflection circuit is set so that the video screen displayed on the cathode ray tube 21 of the viewfinder displays the screen of the effective image portion having the deflection size of the HDTV system, the aspect ratio is 16: 9 is displayed, and a screen different from the 4: 3 aspect ratio of the NTSC system input as the RET signal is displayed. As described above, the television camera device according to the prior art can perform the format conversion of the input RET signal by the provided TV signal format converter 22, but the effective image displayed on the CRT 21 of the viewfinder. Because it is fixed to the television system in which the deflection size for displaying the screen of the unit is set,
Except for the television system that displays the screen of the effective image portion having the set aspect ratio, the screen of the effective image portion having the regular aspect ratio cannot be displayed.

FIG. 3 is an example of a block diagram of a television signal format converter used in the television camera device shown in FIG. In FIG. 3, reference numeral 31 denotes an input terminal to which a RET signal for converting a television system is input;
Reference numeral 32 denotes an A / D conversion circuit that converts the RET signal input to the input terminal 31 into a digital signal, and 33 detects a horizontal synchronization signal HD and a vertical synchronization signal VD of the RET signal input to the input terminal 31. A synchronization detection circuit, 34 is a system detection circuit for detecting the television system of the RET signal input to the input terminal 31, 37 is a frame memory for storing the digital RET signal converted by the A / D conversion circuit 32, 35 is , Digital RET in the frame memory 37
A clock signal generation circuit for generating a clock signal used for signal storage, etc., 36 is a write control circuit for controlling storage of a digital RET signal in a frame memory 37, and 39 is a digital control circuit stored in the frame memory A clock signal generating circuit for generating a clock signal used for reading a RET signal, etc., a read control circuit 38 for controlling reading of a digital RET signal in a frame memory 37, and a reference numeral 40 for a frame memory 3
Reference numeral 41 denotes a D / A conversion circuit for converting the digital RET signal read from 7 into an analog image signal. Reference numeral 41 denotes an output terminal for the RET signal obtained by converting the television system.

The general operation of the television signal format converter will be described. The RET signal of, for example, the NTSC system input to the television camera device is input to the A / D conversion circuit 32, the synchronization detection circuit 33, and the system detection circuit 34 via the input terminal 31. The A / D conversion circuit 32 converts the input NTSC RET signal into a digital signal,
An NTSC digital RET signal is output to the frame memory 37. The synchronization detection circuit 33 receives the input NT
The synchronization signal is separated from the SC RET signal, the horizontal synchronization signal HD and the vertical synchronization signal VD are output, and the system detection circuit 34 detects the television system of the input NTSC RET signal, Television system detection signal F
Is output. The frame memory 37 includes the A / D conversion circuit 3
2 is driven and stored by the write clock signal input from the clock signal generation circuit 35. The storage of the NTSC digital RET signal in the frame memory 37 is based on the number of NTSC scanning lines output from the write control circuit 36 controlled by the television system detection signal F detected by the system detection circuit 34. Is controlled by a writing control signal corresponding to the difference between the set number of scanning lines of the HDTV system.

The NTSC stored in the frame memory 37
The reading of the digital RET signal of the system is controlled by the read control circuit 38 controlled by the television system detection signal F detected by the system detection circuit 34 in accordance with the number of scanning lines of the same television system as described above. Have been. HDT read from frame memory 37
The digital RET signal converted into the V format is input to the D / A conversion circuit 40, becomes an analog RET signal, and is output from the output terminal 41 as a format-converted HDTV RET signal. The details of the television signal format converter are described in Japanese Patent Application No. 9-109 filed earlier by the applicant.
No. 495, "Television signal format converter".

[0012]

A television camera device according to the prior art includes a television signal format converter, converts the television format of an input RET signal, inputs the RET signal to a viewfinder, and converts the format of the RET signal. The video screen of the signal is displayed, but the viewfinder screen always displays the video screen of the effective image section with the set aspect ratio, so the TV screen differs from the set TV system aspect ratio. When a RET signal having a system aspect ratio is input, there is a problem that a video screen of an effective image portion having a normal aspect ratio cannot be displayed. SUMMARY OF THE INVENTION The present invention solves the above-described problem, and sets the deflection output of the viewfinder to RET so that the RET signal input to the television camera device has a video screen of an effective image portion having an aspect ratio defined by the television system. It is an object of the present invention to provide a television camera device in which a video screen of an effective image portion of a viewfinder always has a regular aspect ratio by automatically switching to a deflection output of a television system of a signal. .

[0013]

In order to solve the above-mentioned problems, a television camera device according to the present invention converts a television system of an input video signal into a video signal of a predetermined television system and outputs the video signal. In a television camera device having a television signal format converter and a viewfinder for displaying a video screen of a video signal format-converted by the television signal format converter, information of a plurality of television formats is stored, A television system storage circuit for detecting a television system of the input video signal, and outputting a television system detection signal representing the detected television system; and the television input from the television system storage circuit The required horizontal deflection voltage corresponding to the detected television system is output by the television system detection signal. A horizontal deflection size switching circuit and a vertical deflection size switching circuit for outputting a required vertical deflection voltage. A video screen of a predetermined television system, which has an effective image portion and is format-converted by a television signal format converter, is displayed. More specifically, in the television camera device according to the present invention, the horizontal deflection size switching circuit is switched by a television system detection signal, and outputs a plurality of horizontal deflection voltages set in accordance with the television system. A vertical deflection size switching circuit, which is switched by a television system detection signal, and includes a plurality of vertical deflection voltage circuits for outputting a vertical deflection voltage set in accordance with the television system.

Further, the television camera device of the present invention comprises: a television signal format conversion device for converting a television format of an input RET signal into a video signal of a predetermined television format and outputting the video signal; A television system storage circuit for storing television system information, detecting a television system of the input RET signal, and outputting a television system detection signal representing the detected television system; A horizontal deflection size switching circuit including a plurality of horizontal deflection voltage circuits for outputting a deflection voltage corresponding to the television system of the detected RET signal, which is switched by a television system detection signal inputted from the circuit, and a plurality of vertical deflection voltage switching circuits; A vertical deflection size switching circuit provided with a deflection voltage circuit; A horizontal deflection output circuit and a vertical deflection output circuit for amplifying horizontal and vertical deflection voltages corresponding to the television system of the RET signal input from the size switching circuit and outputting the amplified voltages to the horizontal and vertical deflection circuits of the viewfinder; The viewfinder displays an image of an image signal of a format-converted video signal input from the television signal format converter, and displays a video screen of an effective image portion having an aspect ratio corresponding to the TV format of the RET signal. is there.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a television camera device according to the present invention will be described. In FIG. 1, according to the invention,
FIG. 2 is a block diagram mainly showing a viewfinder portion of a television camera device provided with a television signal format converter. In FIG. 1, 8 is a RET signal input terminal, 2
Is a television signal format converter for converting a television system of an input RET signal into a television RET signal set in a television camera device and outputting the same, and 1 is a television system of an input RET signal. The CRT of the view finder which displays a video screen corresponding to the TV is stored in advance with information of a required television system, detects the television system of the input RET signal, and displays the detected television system. The television system storage circuit 4 for outputting the television system detection signal is switched by the television system detection signal input from the television system storage circuit 3, and outputs the horizontal deflection voltage set corresponding to the television system. The horizontal deflection size switching circuit 5 that receives the That the horizontal deflection output obtained by amplifying the horizontal deflection voltage, a horizontal deflection output circuit which outputs to the horizontal deflection circuit of a cathode ray tube 1, 6 is switched by the television system detection signal input from the television system memory circuit 3,
A vertical deflection size switching circuit 7 for outputting a vertical deflection output set according to the television system, and a vertical deflection output obtained by amplifying the vertical deflection voltage input from the vertical deflection size switching circuit 6 5 shows a vertical deflection output circuit for outputting to a deflection circuit. The horizontal deflection size switching circuit 4 and the vertical deflection size switching circuit 6 are switched by a television system detection signal and output horizontal deflection voltage circuits 11 to 14 which output deflection voltages set in accordance with the television system. And vertical deflection voltage circuits 15-18.

The operation will be described. It is assumed that, for example, an RET signal having an aspect ratio of 4: 3 in the NTSC system is input to the RET signal input terminal 8 of the television camera device. The RET signal having an aspect ratio of 4: 3 in the NTSC system input to the RET signal input terminal 8 is input to the television signal format converter 2 and the television format storage circuit 3. (The television signal storage circuit 3 may be a circuit built in the television signal conversion device 2, or a circuit different from the television signal conversion device 2.) The television system of the converted and output RET signal is set in advance (for example, it is assumed that the aspect ratio is set to the 16: 9 HDTV system), and the input NT
RET signal with 4: 3 aspect ratio in SC format
The signal is converted into a TV RET signal and output to the CRT 1. Therefore, the television signal format converter 2
When the RET signal of the HDTV system is input, the system is converted, and the R of the HDTV system of the same television system is converted.
An ET signal is output.

On the other hand, the television system storage circuit 3 has
Required television system information, for example, N
A television system with an aspect ratio of 4: 3 in the TSC system, a television system with an aspect ratio of 16: 9 in the NTSC system, an HDTV system with an aspect ratio of 16: 9, N
A progressive system having an aspect ratio of 4: 3 in the TSC system is stored. Therefore, when the television system storage circuit 3 receives the RET signal of the television system having the aspect ratio of 4: 3 in the NTSC system, the television system storage circuit 3 compares the RET signal with the stored information of each television system to determine the aspect ratio in the NTSC system. 4: 3 TV ratio RET
It detects that a signal has been input and indicates that the detected NTSC system is a television system having an aspect ratio of 4: 3. For example, a television system detection signal (A) is transmitted to a horizontal deflection size switching circuit 4 and a vertical deflection system. Output to the size switching circuit 6.

The horizontal deflection size switching circuit 4 and the vertical deflection size switching circuit 6 are provided with horizontal deflection voltage circuits 11 to 14 for outputting deflection voltages set according to each television system.
And the vertical deflection voltage circuits 15 to 18. For example, the horizontal deflection voltage circuit 11 and the vertical deflection voltage circuit 15 have an HDTV system, and the horizontal deflection voltage circuit 12 and the vertical deflection voltage circuit 16 have an aspect ratio of 4: 3. The horizontal deflection voltage circuit 13 and the vertical deflection voltage circuit 17 have the aspect ratio of 16: 9.
And the vertical deflection voltage circuit 18 outputs a deflection voltage corresponding to a progressive system having an aspect ratio of 4: 3. Here, the television system detection signal (A) indicating that the television system RET signal having the aspect ratio of 4: 3 in the NTSC system has been input is transmitted by the horizontal deflection size switching circuit 4 and the vertical deflection size switching circuit 6. Is entered into
An NTSC horizontal deflection voltage circuit 12 and a vertical deflection voltage circuit 16 having an aspect ratio of 4: 3 are selected, a required horizontal deflection voltage is supplied to the horizontal deflection output circuit 5, and a required vertical deflection voltage is supplied to the vertical deflection output circuit 7. Output to

Horizontal deflection output circuit 5 and vertical deflection output circuit 7
Means that the input horizontal deflection voltage and vertical deflection voltage are amplified, the horizontal deflection output and the vertical deflection output are output to the horizontal deflection circuit and the vertical deflection circuit of the CRT 1 of the viewfinder, and the television signal format conversion is performed. Together with the HDTV RET signal input from the device 2, the CRT 1
An HDTV video screen of an effective image portion having an aspect ratio of 4: 3 is displayed above. RE for television camera device
For example, a case where a progressive RET signal having an aspect ratio of 16: 9 in the NTSC system, an HDTV system having an aspect ratio of 16: 9, or an aspect ratio of 4: 3 in the NTSC system is input to the T signal input terminal 8 is also applicable. Similarly, a video screen of the HDTV system of the effective image portion having the input aspect ratio of the television system is displayed. Note that the television signal format converter used in the television camera device of the present invention can use the same device as the television signal format converter of the television camera device used in the description of the related art. Is omitted.

[0020]

According to the present invention, the deflection output of the viewfinder is adjusted so that the RET signal input to the television camera apparatus has a video screen of an effective image portion having an aspect ratio defined by the television system. By automatically switching to the television system deflection output of the RET signal, it is possible to provide a television camera device in which the video screen of the effective image portion of the viewfinder always has a regular aspect ratio.

[Brief description of the drawings]

FIG. 1 is a block diagram mainly showing a viewfinder of a television camera device according to the present invention.

FIG. 2 is a block diagram mainly showing a viewfinder of a conventional television camera device.

FIG. 3 is a block diagram of a television signal format converter.

[Explanation of symbols]

1, 21 ... CRT of viewfinder, 2, 22 ...
Television signal format conversion device, 3 TV format storage circuit, 4 horizontal deflection size switching circuit, 5 horizontal deflection output circuit, 6 vertical deflection size switching circuit, 7 vertical deflection output circuit, 8, 28 RET Signal input terminals 11-14
... horizontal deflection voltage circuit, 15-18 vertical deflection voltage circuit, 2
3: Synchronous signal separation circuit, 24: horizontal deflection voltage circuit, 25
... horizontal deflection output circuit, 26 ... vertical deflection voltage circuit, 27 ...
Vertical deflection output circuit, 32 A / D conversion circuit, 33 Synchronization detection circuit, 34 System detection circuit, 35, 39 Clock signal generation circuit, 36 Write control circuit, 37 Frame memory, 38 Read control circuit , 40 ... D / A conversion circuit.

Claims (3)

[Claims] 1. A television signal format conversion device for converting a television format of an input video signal into a video signal of a predetermined television format and outputting the video signal, and a video format-converted by the television signal format conversion device. A television camera device having a viewfinder for displaying a video screen of a signal, storing information of a plurality of television systems, detecting a television system of the input video signal, and detecting the detected television system. A television system storage circuit for outputting a television system detection signal to be displayed, and a required horizontal deflection voltage corresponding to the detected television system based on the television system detection signal input from the television system storage circuit. Horizontal deflection size switching circuit for outputting the required vertical deflection voltage and a vertical deflection size switch for outputting the required vertical deflection voltage. Having a valid image portion having an aspect ratio of a television system which is deflected by the required horizontal deflection voltage and the required vertical deflection voltage, and which is format-converted by a television signal format converter. A television camera device characterized by displaying a video screen of a television system. 2. The television camera device according to claim 1, wherein the horizontal deflection size switching circuit is switched by a television system detection signal and outputs a plurality of horizontal deflection voltages set according to the television system. A horizontal deflection voltage circuit; and a vertical deflection size switching circuit, which includes a plurality of vertical deflection voltage circuits that are switched by a television system detection signal and output a vertical deflection voltage set according to the television system. A television camera device characterized by the above-mentioned. 3. A television signal format conversion apparatus for converting a television format of an input RET signal into a video signal of a predetermined television format and outputting the video signal, and storing information of a plurality of television formats, A television system storage circuit for detecting a television system of the RET signal to be output and outputting a television system detection signal representing the detected television system; and a television system detection circuit input from the television system storage circuit. Said RE switched by a signal and detected
A horizontal deflection size switching circuit including a plurality of horizontal deflection voltage circuits for outputting a deflection voltage corresponding to a television system of a T signal; a vertical deflection size switching circuit including a plurality of vertical deflection voltage circuits; Horizontal deflection output circuit and vertical deflection output circuit for amplifying horizontal and vertical deflection voltages corresponding to the television system of the RET signal input from the circuit and the vertical deflection size switching circuit and outputting the amplified voltages to the horizontal and vertical deflection circuits of the viewfinder A video image of a format-converted video signal input from the television signal format conversion device to the viewfinder, and a video screen of an effective image portion having an aspect ratio corresponding to the TV format of the RET signal. A television camera device characterized by displaying: