JPH10187111A - Video signal converting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily display visibly plural kinds of video signals with different specifications on a display device for a video signal with different specification. SOLUTION: This device is provided with S terminals 8, 9 inputting/outputting an NTSC signal of a TV 6 specification, 15 pins terminals 12, 13 inputting/ outputting an RGB signal of a monitor 11 specification and a signal conversion circuit 16 converting systems of both signals inputted from respective terminals 8, 9, 12, 13, outputting the converted NTSC or RGB signal from one side or both sides of the S or 15 pins terminals 8, 9, 12, 13 according to these kinds and synthesizing videos of both systems, and since a means for exchanging mutual systems between the NTSC and RGB signals is formed integrally, and the constitution is simplified, the attenuation in the signal is prevented, and since at a use time, the system of the signal is converted and further, the videos are synthesized only by inputting from the correspondence terminals 8, 9, 12, 13, complicated wiring work is eliminated, and workability is improved.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is used for alternately changing specifications between a video signal of a personal computer and a video signal of a home television system, and for synthesizing video signals of both different specifications. To a video signal conversion device for performing the above.

[0002]

2. Description of the Related Art Conventionally, for example, a video signal for viewing on a screen of a home television system (hereinafter referred to as TV),
For example, there is a conversion device that captures NTSC (or PAL, SECAM) video as a capture signal into a personal computer set (hereinafter referred to as a personal computer) and displays it on an analog RGB monitor display (hereinafter referred to as a monitor) of the personal computer specification. On the other hand, a conversion device for displaying analog RGB recording format video for viewing on a monitor screen, not for personal computer specification, on a TV or recording with a video tape recorder (hereinafter, VTR) etc. is there.

The former is a so-called RGB (Red) in a predetermined case.
Green Blue) 15-pin or 21-pin output terminal, and analog NTSC (National Television System Committe
e) It has an S (S-super) input / output terminal or a pin input / output terminal for a recording method, and an electronic circuit for converting the image format.

[0004] On the other hand, the latter has, in the case, an input / output terminal for an analog RGB recording system (hereinafter, RGB) and an S or pin output terminal for an analog NTSC recording system (hereinafter, NTSC).
An electronic circuit for the above-described system conversion is provided.

[0005] Among the conversion devices, in the former configuration, the original video of NTSC is directly output from the S output terminal or the pin output terminal, the capture signal is taken into a personal computer and appropriately processed, and the processed video is converted into RGB. Display on the monitor through the output terminal.

On the other hand, in the latter configuration, while the RGB original video is directly output from the RGB output terminal of the conversion device, the NTSC S
The video of the PC can be displayed on a TV or recorded on a VTR through the output terminal or the pin output terminal of the NTSC specification.

[0007] In addition, in order to synthesize both types of images and output the synthesized image in both types, both input and output terminals of both RGB and NTSC are used for mutual system conversion between RGB and NTSC and image synthesis. There is also a conversion device provided with an electronic circuit for the conversion.

[0008] As described above, conventional video system converters generally available on the market include a conversion model from RGB to NTSC, NTSC.
The models that convert from SC to RGB and the models that can combine video with RGB and NTSC have separate configurations and are not provided integrally.

[0009]

Therefore, in order to use a plurality of models at the same time, it is necessary to connect the terminals between the respective models of the conversion device to each other with cables, and such connection work is not complicated. Needless to say, this is an extremely heavy burden on the operator, together with the labor required for the wiring check.

[0010] Furthermore, it is certain that as the number of converters used in the operation increases, the operation efficiency decreases.

[0011] Further, while the possibility of occurrence of connection failure increases with an increase in the number of connection terminals, the electrical resistance increases due to the extension of the total cable length, so that the video signal is surely attenuated. Video quality will be reduced.

When the above-described conventional video signal conversion apparatus is used in an unusual environment, for example, in a presentation at a customer, the reduction in the efficiency of the wiring work and the reduction in the video quality can be extremely serious defects.

In view of the above problems, the present invention provides a method for mutually exchanging schemes between a plurality of types of video signals having different schemes,
It is an object of the present invention to provide a video signal conversion device whose configuration is simplified to obtain a high-quality video while facilitating operations for video synthesis.

[0014]

A first type video signal for inputting / outputting a first type video signal for visually displaying an arbitrary video on a TV 6 is provided.
An input / output terminal 3 and a second input / output terminal for inputting and outputting a second type video signal for displaying an arbitrary video on the monitor 11 in a display mode different from the display mode of the first type video signal 4 and one of the first or second type video signals input from the first or second input / output terminals 3 and 4 is converted into the other type of display, and the converted first or second type video signal is converted. The two types of video signals are divided into the first type according to the type of display method.
Alternatively, a signal conversion circuit 16 for outputting from one or both of the second input / output terminals 3 and 4 is provided.

With this configuration, the first and second
First and second input / output terminals 3 corresponding to the first and second type video signals in use are formed integrally with means for mutual exchange of different types between the type video signals to simplify the configuration. , 4 and the signal conversion circuit 16 converts the first-type video signal to the second-type video signal without performing complicated wiring work, and converts the second-type video signal to the first type video signal.
The first video signal is converted into a video signal of a different type after conversion.
And the second type video signal can be output from the corresponding first and second input / output terminals 3 and 4.

Also, in the configuration in which the signal conversion circuit 16 for converting one or both of the first and second type video signals into a capture signal of the personal computer 10 specification is provided, the first and second input / output terminals 3 and 4 are provided. And converts the first and second types of video signals input from the CPU into capture signals.

Further, in the configuration having the capture terminal 5 for changing the capture signal converted by the signal conversion circuit 16 into a specification that can be taken by the personal computer 10, the signal conversion circuit 16 includes the first and second input / output terminals 3, After converting the first and second types of video signals input from 4 into a capture signal, the video signal is taken into the personal computer 10 by the capture terminal 5.

[0018]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a main configuration of a video signal conversion device (hereinafter, conversion device) 1 of the present invention. The conversion device 1 is housed in a case 2, and a first input / output terminal is provided on the rear side or the front side of the case 2. 3, a second input / output terminal 4, and a capture terminal 5.

The case 2 is formed of an iron plate in order to avoid the influence of so-called electromagnetic wave noise and from the viewpoints of strength and cost, and the front panel (not shown) has a plastic plate as a decorative plate (not shown). ) Is attached.

A first input / output terminal 3 is an analog video recording system for displaying an arbitrary image on a display device of a home television system specification, that is, a TV 6 so that it can be viewed, and recording / reproducing with a home VTR 7. For example, NTSC (or PAL,
SECAM) video signal is input to and output from the converter 1 as a first-type video signal.

In this embodiment, the input side 8 and the output side 9 of the first input / output terminal 3 are the SIN terminal and the pin terminal of the DIN standard, the standard 8 terminal used for a so-called MSX type personal computer.
Pin RGB terminals (all not shown) are provided, and a total of three terminals are provided.

In the first input / output terminal 3, priorities are determined for the terminals 8, 9, and the S terminal, the pin terminal,
When multiple types of pin RGB terminals are connected at the same time for each input / output system, of the multiple types of terminals, only the terminal with the higher priority can be used, and the other terminals with the lower priority are Becomes unusable.

In this embodiment, the first input / output terminal 3
Has three input / output terminals 8 and 9 arranged side by side for video signals. The input side is hereinafter referred to as a V (VIDEO) terminal 8, and the output side of the first input / output terminal 3 is hereinafter referred to as V. It is referred to as terminal 9.

The first input / output terminal 3 is connected to the TV 6 and the VTR 7
The connector of a cable (not shown) corresponding to a video signal input / output V terminal (not shown) provided in the above is engaged with the corresponding V terminals (8, 9).
Video signals can be input and output between the TV 6 and VTR 7 and the converter 1.

A video projector, OHP (= Over Hea), not shown in place of the TV 6 or separately from the TV 6
d Projector) is provided as a display device, or an optical disk recorder or the like is provided as a recording / playback device instead of the VTR 7 or separately from the VTR 7, and is interconnected by the V terminal cable and pin terminal cable. Is also good.

Next, in this embodiment, the second input / output terminal 4 receives an RGB video signal for displaying an arbitrary video on the display device of the personal computer 10, that is, the monitor 11.
The input and output systems are input and output to the converter 1 as seed video signals.
It consists of thirteen.

The second input / output terminal 4 is connected to a 15-pin terminal 12 or 13 by connecting a cable connector (not shown) corresponding to an input / output terminal (not shown) provided on the monitor 11 to the monitor. Video signals can be input and output between the converter 11 and the converter 1.

The capture terminal 5 allows the personal computer 10 to input / output a capture signal for mutually exchanging video signals of the digital recording system to / from the converter 1. In the present embodiment, each input / output system Are SCSI (S
mall Computer System Interface) It consists of terminals 14 and 15.

It should be noted that the capture terminal 5 does not necessarily need to be composed of only the SCSI terminals 14 and 15,
SCSI terminals for RS232C and RS422 terminals not shown
The terminals may be arranged in parallel with the terminals 14 and 15, or one of the three terminals may be provided alone or a plurality of terminals may be provided.

The capture terminal 5 in FIG.
In the present embodiment, the input and output of signals are bidirectionally described by the SCSI terminals 14 and 15 for convenience.
RS232C and RS422 are capable of bidirectional signal input / output with only one system, and the SCSI terminals 14, 15 and the personal computer 10 are connected by a single SCSI cable (not shown). Further, illustration of the terminator is omitted.

The video signal input from each of the terminals 3 to 5 described above is appropriately converted into a video signal of a different system by the signal conversion circuit 16. In the present embodiment, the signal conversion circuit
Reference numeral 16 denotes a configuration for converting a video signal into a signal by a digital recording method.

In other words, the signal conversion circuit 16 cannot directly perform the signal conversion processing on the analog video signal input from the first and second input / output terminals 3 and 4. The video signal of the digital recording system cannot be output from the first and second input / output terminals 3 and 4 as a video signal of an analog format suitable for the TV 6, the VTR 7 and the monitor 11.

Therefore, the first and second input / output terminals 3, 4
And analog / digital (hereinafter, referred to as A / D) conversion circuits 17, 18 and digital / analog (hereinafter, referred to as D / A) conversion circuits 19, 20 are interposed between the signal conversion circuit 16 and the signal conversion circuit 16. Electrical matching is attempted.

That is, the A / D conversion circuit 17 takes in the NTSC video signal from the first input / output terminal 3 and converts it into a digital recording video signal, and the A / D conversion circuit 18 converts the RGB video signal into the second video signal. The video signal is fetched from the input / output terminal 4 and converted into a digital recording video signal. Each digital video signal is input to the signal conversion circuit 16.

A D / A conversion circuit 19 takes in the digital recording video signal from the signal conversion circuit 16, converts it into an NTSC video signal, outputs it to the first input / output terminal 3, and outputs a D / A signal.
The A conversion circuit 20 takes in the digital recording video signal from the signal conversion circuit 16, converts it into an RGB video signal, and outputs it to the first input / output terminal 3.

The signal conversion circuit 16 takes in the digital recording type video signal converted by the A / D conversion circuits 17 and 18, performs a predetermined conversion process on the video signal, and converts it into video data. Write to memory 21 once,
After the written video data is read from the memory 21 and subjected to a predetermined signal conversion process, the video signal is input to the D / A conversion circuits 19 and 20 or the capture terminal 5.

At this time, the signal conversion circuit 16 converts the specification of the NTSC video signal input from the first input / output terminal 3 into the specification of the RGB video signal and inputs the converted signal to the D / A conversion circuit 20, while 2 D / A conversion circuit that converts the specification of RGB video signal input from input / output terminal 4 to the specification of NTSC video signal
Enter in 19.

Thus, the NTSC or RGB video signal is converted into the first signal by the signal conversion circuit 16 in accordance with the type of the display system.
Alternatively, the signal is output from one or both of the second input / output terminals 3 and 4.

The signal conversion circuit 16 captures a capture signal of a specification that the personal computer 10 can capture, converts the capture signal into a video signal of NTSC and RGB specifications, and captures a video signal of NTSC and RGB specifications. The signal conversion circuit 16 has a function of converting the video signal into a video signal and a video signal of the NTSC and RGB specifications and a capture signal.

The capture signal is input from the capture terminal 5 to the signal conversion circuit 16, and the signal conversion circuit 16 converts the capture signal into a video signal of NTSC and RGB specifications. After conversion to the analog recording method, the signals are output from the first and second input / output terminals 3 and 4.

On the other hand, the NTSC and RGB video signals pass through the A / D conversion circuits 17 and 18 from the first and second input / output terminals 3 and 4 and are sent to the signal conversion circuit 16 as digital recording type video signals. Input, and the signal conversion circuit 16
After converting RGB specification video signal to capture signal,
A capture signal is output from a capture terminal 5.

When converting the above-mentioned signal specifications between the NTSC or RGB video signal and the capture signal, the signal conversion circuit 16 temporarily stores the captured video signal in the memory regardless of the type of the specification. The video signal is processed after writing.

Further, the signal conversion circuit 16 has a function of generating a composite video signal for visually combining the captured plural types of video signals regardless of the type of the specification.
The composite video signal is output from any of the first input / output terminal 3, the second input / output terminal 4, or the capture terminal 5.

The personal computer 10 has a CG (Computer Grap
hics) and the desired video and sound
O is recorded on a non-illustrated recording medium such as O, and is further stored in a ROM (not shown) provided in the personal computer 10 in advance.
A control program for the VTR 7 that reproduces the video and sound recorded on the recording medium and the VTR 7 in synchronization with each other and a control program for the recording medium are both stored in advance.

The control program stored in the ROM includes a plurality of systems of recorded video and sound,
Special effects such as arbitrary fade-in and fade-out from R7 and a recording medium, synthesis, and fluctuating color tone are included.

Next, an example of the configuration of the signal conversion circuit 16 shown in FIG. 1 will be described with reference to FIG. The description of is omitted.

In the present embodiment, the signal conversion circuit 16
A chip microcomputer (hereinafter referred to as a one-chip microcomputer) 22 has a main configuration, and a program relating to control of a video signal is stored in a built-in memory (not shown).

The one-chip microcomputer 22 controls a video display signal control circuit 23 for converting a video signal according to a predetermined procedure. In addition, as the capture terminal 5, SCSI terminals 14, 15 and RS232C (or RS422) interfaces 25, 26 are connected.

As can be seen from FIG. 1, a video signal of the PC specification is input to the signal conversion circuit 16 from the capture terminal 5, and a video signal of the NTSC specification is supplied from the V terminal 8 of the first input / output terminal 3. Also, the 15-pin terminal 12 of the second input / output terminal 4
Input video signals of RGB specifications.

When a video signal of the NTSC specification is input from a V terminal (or pin terminal) 8, an A / D
The video signal input to the conversion circuit 17 is decoded from the NTSC format to the YUV format, converted to a digital recording system, and written to the memory 21 after being corrected by the flicker prevention circuit 27.

On the other hand, the video signal of the NTSC specification is also input to signal switching circuits 28 and 29 described later. Flicker prevention circuit
Reference numeral 27 denotes a circuit for making it difficult to visually recognize so-called screen flicker.

On the other hand, when a video signal of the RGB specification is input from the 15-pin terminal (or 21-pin output terminal) 12,
This signal is input to the signal switching circuit 28, the automatic signal detector 30, and the signal switching circuit 31.

The signal switching circuit 28 compares a plurality of video signals of the analog recording system, that is, a video signal of the NTSC specification and a video signal of the RGB specification, together with the automatic signal detector 30, and switches according to the types of both video signals. (Not shown) is switched by the one-chip microcomputer 22 to select and switch the terminal of the output video signal.

Then, the one-chip microcomputer 22 transmits the RGB-specific video signal to the 15-pin terminal 13 based on the NTSC-specific video signal.
When outputting from the V terminal 9, the above switch is switched so that the input from the V terminal 8 is prioritized, and when outputting the NTSC video signal from the V terminal 9 based on the RGB video signal, The switch is switched so that the input from the terminal 12 is prioritized.

The signal switching circuits 29 and 31 are used for mutual conversion between a video signal of RGB specification and a video signal of NTSC specification.
The type of the video signal output from the V terminal 9 and the 15-pin terminal 13 is switched for so-called through output.

The signal switching circuit 29 outputs an NTSC video signal from the V terminal 9 based on the RGB video signal input from the 15-pin terminal 12, and outputs the NTSC video signal from the V terminal 8. When outputting a video signal of the RGB specification from the 15-pin terminal 13 based on the video signal, the video signal of the NTSC specification input from the V terminal 8 is directly output through the V terminal 9.

On the other hand, the signal switching circuit 31 converts the video signal digitally processed based on the NTSC video signal input from the V terminal 8 into an RGB video signal.
When outputting an NTSC video signal from the V terminal 9 based on the RGB video signal input from the 15 pin terminal 12 while outputting from the pin terminal 13, the RGB video input from the 15 pin terminal 12 is output. The signal is output from the 15-pin terminal 13 as it is.

The video stabilization circuit 32 has a function for stabilizing the video signal so that the A / D conversion circuit 18 performs A / D conversion appropriately and accurately according to the type and timing of the video signal. I have.

That is, the video signal input to the A / D conversion circuit 18 is an AC signal, and the potential difference between the reference potential and the video signal potential required for the A / D conversion becomes indefinite. When an analog recording video signal is input, it may be output as a different digital recording video signal.

Therefore, utilizing the characteristic that the synchronizing signal included in the video signal of the analog recording system always has the reference potential, the video stabilizing circuit 32 determines the relevant portion of the synchronizing signal according to the specification of the next-stage circuit. In a process of adjusting the reference potential of the A / D conversion to the same potential in correspondence with the reference potential, the input video signal is stabilized and then input to the amplifier 33.

In the amplifier 33, the video signal is converted into a digital recording system and written into the memory 21 while being corrected by the flicker preventing circuit 27 in the next stage.

Note that the A / D conversion circuits 17 and 18 convert the A / D
At the time of / D conversion, original oscillators 34 to 36 are provided for synchronizing signals or for generating a reference clock for conversion processing. A / D conversion circuit 17 is connected to original video oscillator 34, and a video signal of NTSC specification is provided. The flicker prevention circuit of the next stage at a predetermined timing
Enter 27.

On the other hand, the A / D conversion circuit 18 includes a personal computer original oscillator 35 and a personal computer TV original oscillator 36.
The signal switching circuit 37 receives a reference clock from one of the original oscillators 35 and 36 according to the type of one of the video signals, and performs A / D conversion timing and a signal to the flicker prevention circuit 27. The timing of capturing the video signal is intended.

The reference clocks of the two oscillators 35 and 36 are also inputted to the signal switching circuit 38 at the same time.
Is for the video display signal control circuit 23 to write the video signal to the memory 21 and to set the readout timing.

The video signal written in the memory 21 is input to the next-stage signal switching circuit 39 at a predetermined timing by the video display signal control circuit 23, and the D / D signal is output according to the type of the video signal.
The signals are D / A-converted by A-conversion circuits 19 and 20 and input to a signal switching circuit 40 at the next stage.

A subtitle display circuit 41 is connected to the signal switching circuit 40, and a desired image such as a subtitle is created by operating a screen creation device (not shown). And the video signal constituting
The D / A conversion circuits 19 and 20 combine the D / A converted video signals and output the synthesized video signals.

Of course, a caption display circuit is provided in the signal switching circuit 40.
If the video signal of the desired video is not input from 41, D / A
Only the analog recording video signal that has been D / A converted by the conversion circuits 19 and 20 is output from the signal switching circuit 40.

In FIG. 2, the A / D conversion circuit 18, the memory 21, and the flicker prevention circuit 27 are provided in two systems for performing so-called inner sleeve processing.
If 27 requires relatively high-speed processing that cannot be responded with only one system, it is distributed to two circuits 18, 21, and 27,
The processed video signal is transferred to the corresponding D / A conversion circuits 19 and 20 at the subsequent stage by switching the circuits 18, 21 and 27.

The analog recording video signal output from the signal switching circuit 40 is once input to the amplifier 42 and amplified at a predetermined amplification rate, and then input to the video encoder 43 and the signal switching circuit 31. You.

The video signal input to the video encoder 43 is encoded from the RGB / YUV format into the NTSC format, and is synchronized and tuned by the synchronization signal generator 44 and the tuning oscillator 45. The video signal output from the V terminal 9 through the signal switching circuit 29 and input from the amplifier 42 to the signal switching circuit 31 is output from the 15-pin terminal 13. The power supply device 46 supplies power to each unit of the converter 1.

A description will be given below of a presentation in which the video of the personal computer 10 and the VTR 7 is synthesized by the converter 1 having such a configuration as an example.

The presentation refers to a form in which a message is transmitted by displaying an arbitrary combination of video and sound on a predetermined TV 6 or a speaker (not shown).

Further, in the present embodiment, the personal computer 10 and the monitor 11 are connected by the dedicated line 22 shown by a virtual line. Converter 1 through pin terminals 12 and 13
When the monitor 11 and the monitor 11 are connected, the video signals on the 15-pin terminals 12 and 13 are prioritized.

First, desired video and sound to be presentation materials are recorded on the above-mentioned recording medium and a video cassette tape, both of which are not shown, and a VTR 7, a personal computer 10, and a TV 6 in a format corresponding to the video cassette tape.
Prepare in advance at the venue along with connection cables.

Next, in order to set the equipment 6, 7, 10, 11 prepared in the venue, cables corresponding to the model are selected, and the terminals 3 to 5 of the converter 1 and the equipment 6, 7, and 10,1
1 is connected as appropriate.

That is, in the first input / output terminal 3, the V terminal 8 is connected to the output side of the VTR 7 and the V terminal 9 is connected to the TV 6 by an S cable.

In the second input / output terminal 4, the 15-pin terminal 12 is connected to the monitor 11 by the cable, and the 15-pin terminal 13 is not used in this embodiment.

By connecting the output terminals (not shown) of the TV 6 and the monitor 11 to other TVs 6 and the monitor 11, the contents can be simultaneously displayed on a plurality of display devices, so that a more effective presentation is realized. .

Further, the capture terminal 5 is connected to the SCSI terminals 14 and 15
Is connected to the personal computer 10 with the SCSI cable of one system, the connection of the devices 6, 7, 10, 11 to the converter 1 is completed.

Then, power is supplied to each of the equipments 6, 7, 10, and 11 so that the equipment can be appropriately started. In particular, the personal computer 10 executes the control program for the VTR 7 and the control program for the recording medium. Read from the ROM and wait in the activated state.

Then, by activating the above-mentioned waiting program, the personal computer 10 responds to the above-mentioned program steps,
A plurality of types of video signals can be displayed individually or combined on the TV 6 and the monitor 11 irrespective of the type of NTSC or RGB video signal.

As described above, in the present invention having the above structure,
6, 7, 10, 11 are connected to a single converter 1 instead of a plurality of types of converters as in the prior art, so there is no need to connect multiple types of converters to each other. The increase in the number of terminals and the total cable length are reliably suppressed.

Therefore, while suppressing an increase in the set time of the conversion device 1 and improving the work efficiency, the number of connection terminals is reduced as compared with the above-mentioned conventional model, so that the connection failure at the connection terminal portion and the total cable length are reduced. The increase of the electrical resistance value due to the increase of the image signal is suppressed, and the attenuation of the video signal and, consequently, the reduction of the video quality are surely suppressed.

The conversion device 1 has a function of converting a video signal,
Since it has a function of synthesizing a plurality of types of video signals, and these are integrally formed in the case 2, it is not necessary to check the wiring of the plurality of types of electric circuits with each other. In addition to facilitating handling and transport, space saving of the installation space can be achieved.

Further, according to the present invention, when a display method of a video signal is converted to a different display method, and when a video signal of a predetermined display method is conventionally made to be a display device 6 or 11 of a different display method, the present invention is applied in accordance with the specifications. Although the conversion device 1 is used individually, in the present invention, the memory 21 is not provided independently for each conversion specification of each video signal, but regardless of the conversion specification and the type of the video signal. Commonly used.

As a result, an increase in the number of parts can be prevented and the structure can be simplified easily, so that not only can the product reliability be improved easily, but also the increase in the number of parts can be suppressed and the accompanying increase in the number of parts can be prevented. By suppressing an increase in the number of work steps, it is possible to achieve a secondary effect that cost is reduced as well as workability is improved.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a schematic configuration of the present invention.

FIG. 2 is a more detailed block diagram than the block diagram of FIG. 1;

[Explanation of symbols]

 Reference Signs List 1 video signal converter 3 first input / output terminal 4 second input / output terminal 5 capture terminal 6 TV 8,9 V terminal (input / output of first input / output terminal) 10 personal computer 11 monitor 12,13 15 pin terminal 14, 15 SCSI terminal 16 Signal conversion circuit 21 Memory

Continuing on the front page (72) Inventor Jing Kung Shu Taiwan Taipei Xian Yongho City Yanyang Road 502 Arbor Media Technologies Inc. (72) Inventor Te Kenbun Taiwan Taipei Cien Yongho City Yanshan Road 502 Arbor Media Technologies Inc.

Claims (13)

[Claims] A first input / output terminal for inputting / outputting a first type video signal for visually displaying an arbitrary image on a display device of a predetermined display method; and displaying the first type video signal. A second input / output terminal for inputting / outputting a second type video signal for visually displaying an arbitrary image on a display device having a display system different from the system, and inputting the signal from the first or second input / output terminal. The first
While converting one display method of the kind or the second kind of video signal into the other display method, the converted first kind or the second kind of video signal is converted into the first or the second kind according to the type of the display method. And a signal conversion circuit for outputting the signal from one or both of the two input / output terminals. 2. The apparatus according to claim 1, further comprising a signal conversion circuit for converting one or both of the first and second types of video signals into a capture signal that can be captured by a personal computer. The video signal conversion device according to the above. 3. The video signal conversion device according to claim 2, further comprising a signal conversion circuit capable of capturing a capture signal. 4. The video signal conversion device according to claim 2, further comprising a capture terminal for mutually inputting and outputting a capture signal between the signal conversion circuit and the personal computer. 5. The video signal according to claim 2, further comprising a signal conversion circuit for converting a capture signal into one or both of a first type and a second type of video signal. Conversion device. 6. SCSI, RS232C or RS42
The video signal conversion device according to any one of claims 3 to 5, further comprising a capture terminal comprising at least one of (2) and (3). 7. A signal conversion circuit for converting a first type or second type video signal of an analog video recording system into a second type or first type of video signal of an analog RGB recording system is provided. The video signal conversion device according to claim 1. 8. A signal conversion circuit for converting a first type or second type video signal of an analog RGB recording system into a second type or first type of video signal of an analog video recording system. The video signal conversion device according to claim 1. 9. An A / D conversion circuit for converting a first or second type video signal of an analog RGB recording format into a digital recording format, and the video signal converted into a digital recording format by the A / D conversion circuit. 9. The video signal conversion device according to claim 1, wherein a memory for writing and reading is provided in the signal conversion circuit. 10. An A / D conversion circuit for converting a first type or second type video signal of an analog video recording system to a digital recording system, and the video signal converted to a digital recording system by the A / D conversion circuit. 10. The video signal conversion device according to claim 1, wherein a memory for writing and reading is provided in the signal conversion circuit. 11. A first or second type video signal of an analog recording system is written to a memory by a digital recording system, the video signal is read from the memory, and the read video signal is converted to a video signal of an analog video recording system. 11. The video signal conversion device according to claim 10, further comprising a signal conversion circuit for converting the video signal into a second type or first type video signal. A first or second input / output terminal or a first or second input / output terminal for synthesizing a composite video signal that visually combines the first and second type video signals input from the first and second input / output terminals. 12. The video signal conversion device according to claim 1, further comprising a signal conversion circuit for outputting signals from both of them. 13. A first input / output terminal, a second input / output terminal, a second input / output terminal, or a second input / output terminal, which combines a plurality of types of video signals input from the capture terminal so as to be visually perceptible.
7. The video signal conversion device according to claim 4, further comprising a signal conversion circuit for outputting from at least one of the input / output terminal and the capture terminal.