JPS62102689A - Video interface device - Google Patents

Abstract

PURPOSE:To attain various video processings obtained by various combinations by providing a function decoding a command not included in a television function coping with a personal computer or an audio visual AV to an input/output interface section. CONSTITUTION:A RGB signal selected by a RGB interface section is fed also to an A/D conversion section 14 and A/D-converted by receiving a sampling clock from a personal computer. The sampling clock is subjected to buffering by a decoding section 11 from a connector 3b and fed to the A/D conversion section 14. When a RGB interface section 8 selects a signal from a decoder 7n by using a YS signal from the personal computer, color data from the A/D conversion section 14 is sent to the connector 3b. The personal computer receives the color data and stores it in a memory as a synchronizing signal. The decoding section 11 receives a command from the personal computer, judges the selection of an external video signal, switching and combination of sound selection and decides the flow of various signals together with a control section 17.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention connects a personal computer (hereinafter referred to as a personal computer) to a personal computer AV (audio/visual) television, an AV compatible home television, etc. The present invention relates to a video interface device used for extended use of AV equipment.

[Background Art] With recent advances in television technology, so-called AV compatible televisions are becoming mainstream. This type of TV is equipped with a 21-pin multi-connector (hereinafter referred to as RGB connector) for inputting analog RG B (i. For example, superimpose decoding can be easily achieved by simply controlling the signals assigned to the RGB connectors.Also, once the video signal is decoded into RGB signals, the A/D It is also possible to convert the signal and import the converted signal into a computer.

[Problems to be Solved by the Invention] As mentioned above, there are many methods for processing video signals and controlling audio signals accompanying video signals. I had no choice but to rely on the functions on my side.

Therefore, in order to actually perform the above-mentioned video processing, there are many restrictions on the interface between handheld devices.

The reality is that the general public cannot easily enjoy these things.

This invention was made in view of the above-mentioned conventional problems, and its purpose is to provide an input/output interface section that can also send and receive commands from a pan controller with the function of decoding commands from a personal computer, and to provide an AV compatible TV function. By adding a function to decipher commands that are not included and controlling intermediaries between PCs and AV equipment, the range of applications of the entire system can be expanded, such as video games using Super Invoice and the use of memory on the PC side. An object of the present invention is to provide a video interface device that allows editing of video signals.

[Means for Solving the Problems] The video interface device of the present invention includes a first input section into which a video signal is input, a video signal and an analog RG
an output section that outputs a B signal, a decoder section that color demodulates the video signal into an analog RGB signal, a second input section that receives an analog RGB signal and a control signal from a personal computer, etc., and the above two input sections. an RGB interface section that selects an analog RGB signal from one of the above; an encoder section that converts the selected analog RGB signal into a video signal; and a decoder section that decodes the control signal from the personal computer or the like. , a control unit that instructs and controls the combination of audio signals accompanying the video RGB signal, and a waveform conversion input/output unit that sends a synchronization signal generated based on the external video signal to the personal computer or the like. , and a Δ/D converter that converts the analog RGB signal demodulated from the external video signal into a digital signal and outputs the digital signal.

[Operation] By connecting a personal computer and various AV equipment groups to each input/output section of the above-mentioned video interface device, these AVgl equipment groups can be controlled by the personal computer, and various functions can be performed using the signal processing function of the personal computer. An AV system that can easily perform video processing can be constructed.

[Embodiment] FIG. 1 shows an example of an AV system configured using the video interface device of the present invention.

(1) is the video interface of this invention, (2a) is R
Home TV with GB connector, (2b) is RGB
A monitor-type TV equipped with a connector, (3) a personal computer with an RGB signal output function, (3a) a personal computer (3)
) and the connector (3b) of the video interface device (1)
and the cable that connects it.

(4) is a device group A that can output video signals; (4a) is a video camera, (4b) is a video tape recorder, and (4C) and (4d) are video disk players.

(5) is a group of AV equipment that receives and receives video signals;
) is a component display type TV. Further, (6) is a group of audio equipment that receives and receives audio signals accompanying video signals.

FIG. 2 shows an example of the external appearance of the connector portion, and FIG. 3 shows the configuration of the video interface device (1).

Here, as an example, the AV mechanism group (4
) through the input connector section (4f) to output the RGB signal to the RGB connector section (2C), the configuration and operation of FIG. 3 will be explained.

A video signal input from the input connector section (4f) passes through the video changeover switch section (13) and is amplified. The switch section (13) operates according to instructions from the control section (17) to amplify one of the video signals from the input connector section (4f) or 2C) and send the signal to the next stage.

The audio signal accompanying the video signal is similarly controlled and sent to the next stage.

The video signal sent out from the switch section (13) is input to a decoder circuit (7) and a synchronization signal separation circuit (10). The synchronization signal separation circuit (10) separates horizontal and vertical synchronization signals included in the video signal and sends them to the decoder circuit (10).
7), the RGB interface circuit (8) and the waveform conversion input section (15), and the signal compression section (AT
T) (16) to the RGB connector (2C) as a composite sync signal (C5VnC).

On the other hand, the decoder circuit (7) includes the synchronization signal separation circuit (
The video signal from the switch circuit (13) is color-demodulated to generate RGB signals in synchronization with the blanking pulse and the pulse 1 to gate pulses from the switch circuit (10).

Further, the signal from the connector (3b) is decoded by the decoder (11), the decoder (11) assigns meaning to the TS signal according to the control signal from the control unit (17), and the RGB interface unit (8) assigns meaning to the TS signal. Upon receiving the YS signal, it selects two RGB signals according to the instructions of the YS signal and sends them to the next stage.

In this way, the RGB signals from the decoder circuit (7) pass through the RGB interface (8).

The RGB signal that has passed through the RGB interface section (8) is processed by the signal compression section (16) in the same way as the composite sync signal.
) to the RGB connector (2C), and the TV (
2a) or (2b).

On the other hand, the RGB that has passed through the RG8 interface section (8)
The signal is also input to an encoder circuit (9) and converted into a video signal. This video signal is transmitted to the output connector (
5C) and supplied to the AV equipment groups (4) and (5).

Next, the flow of RGB signals from the personal computer (3) will be explained.

The RGB signal from the computer (3) is applied to the connector (3b) via the cable (3a), and at the same time, the RG
The Ys which is the switching signal of the B interface circuit (8)
A double signal is given from a pan converter (3>).This Ys double signal decoder (11) decodes it, and the RGB interface circuit (8) is switched accordingly.

The waveform conversion input/output section (15) is a synchronization signal separation circuit (10)
It operates by receiving horizontal and vertical synchronization signals from the computer (
3) performs waveform conversion to the signal level required for the decoder (1).
In addition to sending the synchronization signal to 1), it also receives the composite sync signal from the connector (3b) via the decoder (11), converts it into a waveform at the level of an analog processing system, and supplies it to the synchronization signal separation circuit (10). do. Synchronous signal separation circuit (1
Q) generates a synchronization signal according to the control signal from the control unit (17). The decoding unit (11) includes a waveform conversion input/output unit (
15) is output to the connector (3G) in accordance with the request from the personal computer (3). Computer (3)
receives the above-mentioned synchronization signal and can synchronize the timing with an external video signal or the like.

In addition, the computer (3> is the video selector switch section (13)
A signal instructing switching is also sent out, and the control section (17) switches the switch section (13) in accordance with this instruction. The video signal selected by the switch section (13) is input to the Domei signal separation circuit 10 and the decoder (7). Audio signals accompanying video signals are similarly processed. The sound mix circuit (12) receives the sound signal from the personal computer (3) and at the same time receives the audio selection signal from the control unit (17), and based on the sound signal, sends the sound signal or the audio signal to the connector (2C) and ( 5C).

The RGB signal selected by the RGB interface section (8) is also sent to the A/D conversion section (14), where it is A/D converted in response to a sampling clock from the personal computer (3).

This sampling clock is sent from the connector (3b>) to the decoder (11), where it is buffered and then the A/D converter (
14).

When the signal from the decoder (7) is selected in the RGB interface section (8) by the Ys multiplied signal from the personal computer (3), the color data from the A/D conversion section (14) is sent to the connector (3b>). The personal computer (3) receives this color data and stores it in the memory in synchronization with the synchronization signal.

The decoding unit (11) receives instructions from the personal computer (3), determines external video signal selection, audio selection switching, combination, etc., and determines the flow of various signals together with the control unit (17). .

For example, the video signal is taken in from the connector (4f), the audio signal is also taken in from the connector (4f), and the audio signal is taken in from the connector (5f).
In the process of outputting to C) and (2C),
If the command signal from the computer (3) is the video signal (4
f>, if it is mistaken that the audio signal is from (2C), the decoder (11) decodes the above command signal, determines the priority of the video signal, and issues an instruction to generate a video switching signal and audio switching. It is sent to the control section (17). Upon receiving this instruction, the control unit (1
7) generates a switching signal to take in the video signal and audio signal from (4f), and sends it to the switch section (13).

Furthermore, when performing superimposition by mixing the data generated by the personal computer (3) and an external video signal, the decoding section (11) buffers the YS signal and sends it to the RGB interface section (8). Part (17)
The sound mix circuit (12) is controlled by instructing whether or not there is an instruction to mix sounds.

[Effects of the Invention] As explained in detail above, by using the video interface device of the present invention, RGB signals generated by a personal computer or the like can be freely handled by the software of the personal computer as an external video signal. , superimpose processing, and external video signals can be easily stored in the computer's memory. Therefore, the operations of general home televisions and audio equipment can be controlled by signals from a personal computer, and various video processing can be easily performed in various combinations, expanding the ways to enjoy AV equipment.

[Brief explanation of drawings]

FIG. 1 shows A using the video interface device of the present invention.
A groove bottom view of the V system, FIG. 2 is an external view of the connector portion of the above device, and FIG. 3 is a block diagram showing the configuration of the above device. In the figure, (1) is a video interface device (3) is a personal computer, and (3b) is a connector part (second
(input part), (4f) is the connector part (first input part),
(2c) is the connector part (RGB signal output part), (5c
) is the connector section (video signal output section). Note that the same reference numerals in each figure indicate the same or corresponding parts.

Claims (1)

[Claims] (1) A first input section into which a video signal is input, an output section which outputs a video signal and an analog RGB signal, a decoder section which color demodulates the video signal into an analog RGB signal, and an analog RGB signal from a personal computer etc.
a second input section for receiving signals and control signals; an RGB interface section for selecting an analog RGB signal from either of the two input sections; and an encoder for converting the selected analog RGB signal into a video signal. Department and
A decoding section for decoding control signals from the personal computer, etc., a control section for instructing and controlling the combination of audio signals accompanying video signals and RGB signals, and a synchronization signal generated based on the external video signal. A video interface device comprising a waveform conversion input/output section for sending to the personal computer or the like, and an A/D conversion section for converting an analog RGB signal demodulated from the external video signal into a digital signal and outputting the digital signal.