JPH05191865A - Connecting device for audio equipment or video equipment - Google Patents

Abstract

PURPOSE:To simplify connecting work between equipments by previously superimposing an offset voltage which is different between equipments on an audio signal and a video signal and detecting the offset voltage. CONSTITUTION:A video tape recorder 9A records and reproduces the audio signal A1A and the video signal V1A in VTR part 11 and superimposes the offset voltage which is assigned by a DC superimposing circuit 13 on a audio signal A1A and a video signal V1A to output them. In a similar way, a video disk player 9B reproduces a video disk, outputs a audio signal A1B and a video signal V1B and superimposes the assigned offset voltage to output them. A television tuner 9C receives a selected channel, outputs a audio signal A1C and a video signal V1C and superimposes the assigned offset voltage to output them. Then, the respective offset voltages are detected to detect the output equipment of the respective audio signal and the video signal.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to improvement of a connection device for audio equipment or video equipment.

[0002]

2. Description of the Related Art Conventionally, in an audio video device such as an amplifier and a monitor device, it is possible to selectively input a plurality of input signals. Thus, the user can connect a desired audio device and a video device to predetermined input terminals to form a desired audio video system.

[0003]

However, in the case of forming an audio video system in this way, connecting cables for audio signals and video signals are connected to predetermined input terminals that are set in advance for each audio device and each video device. There is a problem that it is necessary to connect and the connection work is complicated. Further, there is a drawback in that if the system configuration becomes large, erroneous connection is likely to occur due to this, and if the erroneous connection is made, it will be difficult to find out. As one method of solving such a problem, there is also a means in which the user sets and inputs the connected device of each input terminal after connection. However, there is a problem that the input operation itself is complicated.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a connection device for an audio device or a video device which can be easily connected to form a desired audio video system or the like.

[0005]

According to the present invention, in the connection device of an audio device and / or a video device for transmitting / receiving an audio signal and / or a video signal, the above-mentioned audio signal and / or the video signal are previously added to the audio signal and / or the video signal. This is achieved by a connection device of an audio device or a video device, in which different offset voltages are superimposed on the audio device or the video device and the connection of each audio device or video device is detected by detecting the offset voltage. ..

[0006]

According to the above configuration, if different offset voltages are preliminarily superimposed on the audio signal and / or the video signal in each audio equipment or video equipment, and the offset voltage is detected, the equipment voltage is detected based on the offset voltage. The connection can be determined.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that the examples described below are suitable specific examples of the present invention, and therefore, various technically preferable limitations are attached thereto, but the scope of the present invention particularly limits the present invention in the following description. Unless otherwise stated, the present invention is not limited to these modes.

In FIG. 1, reference numeral 1 denotes an audio / video system as a whole, which outputs a video signal SV to a monitor device 3 via a selector 2 and an audio signal S.
Output A to the amplifier 5. As a result, in the audio / video system 1, desired audio equipment and / or video equipment can be connected to the selector 2 for monitoring by the monitor device 3, and music or the like can be enjoyed by the speaker 7.

Here, the audio video system 1 is
The audio signal A1A and the video signal V1A output from the video tape recorder 9 are input to the selector 2. Furthermore, the audio video system 1
Is the audio signal A1 of the video disk player 9B.
B, the video signal V1B, the audio signal A1C of the television tuner 9C, and the video signal V1C are input to the selector 2.

At this time, the video tape recorder 9A is
In the VTR section 11, the audio signal A1A and the video signal V
1A is recorded and reproduced, and the audio signal A1A
The video signal V1A and the video signal V1A are supplied to the DC superimposing circuit 13, and the offset voltage assigned to the video tape recorder 9A is superposed and outputted. Similarly, the video disk player 9B reproduces the video disk and outputs the audio signal A1B and the video signal V1B, and at this time, the built-in DC superimposing circuit superimposes the offset voltage assigned to the video disk player 9C and outputs it. To do.

Also, the television channel 9C receives the channel selected by the user and receives the audio signal A1.
C and video signal V1C are output. At this time, the television tuner 9D is a built-in DC superimposing circuit that superimposes the offset voltage allocated to the television tuner 9D to produce an audio signal A1C and a video signal V1C.
Is output. As a result, the video tape recorder 9A, the video disk player 9B, and the television player JUNA 9C
In the above, the output voltage of each audio signal and video signal can be detected by detecting the offset voltage superimposed on each audio signal and video signal.

The selectors 2 are respectively provided with audio signals A
1A to A1C and the video signals V1A to V1C are received by the DC identification circuit 15, where the offset voltage is identified. Further, the selector 2 outputs the detected offset voltage to the analog-digital conversion circuit (A / D) 17, where each offset voltage is converted into a digital signal for control circuit 1.
Output to 9. As a result, in the selector 2, the audio signals A1A to A1C and the video signals V1A to V are generated based on the output signal of the analog-digital conversion circuit 17.
The output device of 1C can be discriminated so that it is possible to judge what kind of audio signal device and video device are connected to each input terminal.

The control circuit 19 is formed by an arithmetic processing circuit and switches the operation of the selector in response to the operation of a predetermined operator. At this time, the control circuit 19 selects the selection circuit 21 based on the output signal of the analog-digital conversion circuit 17.
, So that, for example, when the user selects the video tape recorder 9A, the audio signal A1
A and the video signal V1A are selectively output.

This embodiment is configured as described above, outputs the audio signal and the video signal by superimposing the offset voltage assigned to each audio / video device, and detects the offset voltage to detect each audio signal. Also, the output device of the video signal can be discriminated. Therefore, a user can connect an audio signal and a video signal to a desired input terminal of the selector 2 to form an audio video system, simplify the connection work by that amount, and effectively avoid erroneous connection. it can.

In the above embodiment, the case where the selector selectively outputs the audio signal and the video signal has been described, but the present invention is not limited to this, and the audio signal can be applied to, for example, an editing device or a special effect device. It can also be applied when processing video signals.

Further, in the above-mentioned embodiment, the case where the offset voltage assigned to each device is superimposed on the audio signal and the video signal has been described. At this time, different offset voltages are superimposed on the audio signal and the video signal. May be. With this configuration, the type of the input signal can be identified on the selector side, and the audio signal and the video signal can be selectively output based on the identification result.

Further, in the above-mentioned embodiments, the case where the present invention is applied to the audio video system is described, but the present invention is not limited to this and can be widely applied to the audio system.

[0018]

As described above, according to the present invention, an audio signal and / or a video signal are preliminarily superimposed with different offset voltages between devices, and the offset voltage is detected to detect each audio device or video. It is possible to easily detect the connection of the devices, which simplifies the connection work between the devices and reduces erroneous connections.

[Brief description of drawings]

FIG. 1 is a block diagram showing an audio video system according to an embodiment of the present invention.

[Explanation of symbols]

 1 Audio Video System 2 Selector 9A Video Tape Recorder 9B Video Disc Player 9C Television Display 13 DC Superimposing Circuit 15 DC Discriminating Circuit 17 Analog to Digital Converter 19 Control Circuit 21 Selection Circuit

Claims (1)

[Claims] 1. An audio equipment and / or video equipment connection device for transmitting and receiving an audio signal and / or a video signal, wherein the audio signal and / or the video signal is preliminarily superposed with different offset voltages in the respective audio equipment and / or the video equipment. A connection device for an audio device or a video device, wherein the connection of each of the audio devices or the video devices is detected by detecting a voltage.