JPH0721836B2 - Multi-input A / V miswiring warning device - Google Patents

Description

The present invention relates to a multi-input A / V miswiring warning device for detecting a miswiring state to a multi-input A / V (A: audio, V: video). It is about.

Conventional technology and problems TV video signals and TV audio signals output from the inside are video signals and audio signals of a video tape recorder (VTR) connected to the outside, and video signals of a microcomputer connected from the outside. In addition, when a television of a multi-processing system that outputs an audio signal is gradually required, a means is required that allows a user to immediately identify the presence or absence of incorrect wiring when an externally connected electronic product or the like has incorrect wiring. It was a thing. However, in the past, there was no other means to detect the mis-wired status of multi-input A / V, so there is a drawback that an error signal is output from the cathode ray tube and the speaker when the mis-wired status occurs. There was a drawback in that it was troublesome to find the wiring state.

Means for Solving Problems An object of the present invention is to use an audio synthesizing unit and a character generator so that an audible alarm and an alarm screen appear at the time of miswiring of a multi-input A / V so that an external electronic device is miswired. An object of the present invention is to provide a miswiring warning device capable of immediately identifying the state.

Another object of the present invention is to provide a miswiring warning device capable of easily processing the display of the alarm sound and the alarm screen by using the existing circuit of the television receiver having the on-screen function as it is.

The feature of the present invention is that it is formed between the A / V control logic element, the CRT drive element, and the audio switching element, and when the wiring is wrong, the output video signal and the audio signal are detected by the output of the A / V control logic element to make an error. By controlling the CRT drive element and the audio switching element through the erroneous wiring detection means that outputs a wiring detection signal, the remote control adjustment element of the output of the erroneous wiring detection means, the character generator, and the voice synthesis element. An erroneous wiring warning device is provided, which comprises erroneous wiring sensing means for sensing a miswiring state.

Embodiments Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a circuit diagram of an embodiment of the present invention, in which an internal video signal and an audio signal of an input terminal I ₁ -I ₄ applied to an A / V switching unit 1 and an external video signal and an audio signal are A / V for external input selection. It is configured to be controlled by the output P _{1 of the} V control logic (A / V control logic) 6, and is a video signal processing unit 2, a CRT drive 3, an audio switching unit 4, an audio signal processing unit.
5. In the circuit for driving the cathode ray tube CRT and the speaker SP through the amplifier AMP, the signal detection section 7 formed between the A / V control logic 6 and the CRT drive 3 and the audio switching section 4 has the A / V control logic 6 Is controlled by the output P ₂ of the A / V switching unit 1 to detect the miswiring state between the video signal and the audio signal which are the outputs P ₁ and P ₂ of the A / V switching unit 1 and output the miswiring detection signal. Each remote control adjustment unit 8
The CRT drive 3 and the audio switching unit 4 are controlled through the voice synthesizer 9 and the character generator 10 to control the cathode ray tube CR.
A warning screen and sound are output to T and the speaker SP.

Here, the external video and audio signals are a number of VTR signals, and the internal video signal is a TV signal. The A / V switching unit (1) is a general analog switching integrated device, and for example, a product manufactured by Toshiba (model name TC4053BP) is used. Also,
The term "logic" in the drawing indicates a state signal of H level and L level.

The operation and effect of the present invention thus configured will be described below.

In the whole configuration diagram of the present invention, an internal video applied from input terminals I ₁ -I ₄ by controlling the A / V switching unit 1 by a control signal generated from the output P ₁ side of the A / V control 6. And audio signal, external video and audio signal are selected, then each video signal processing unit 2, CRT drive
By driving the cathode ray tube CRT and the speaker SP through the audio switching unit 4, the audio signal processing unit 5, and the amplifier AMP, the user can reproduce a desired screen and sound. If the external A / V input connection to the A / V switch 1 is mistakenly miswired and the external A / V signal does not match or is not applied, the output P ₂ of the A / V control logic 6 The controlled signal detection unit 7 detects the states of the video signal and the audio signal output from the A / V switching unit 1, and the audio signal is erroneously output to the output P1 of the A / V switching unit 1 due to miswiring. is applied to the terminal P ₁ of the remote control adjustment unit 8 while being applied by output miswiring detection signal is a logic signal that is has been long as for example the high level to the terminal P ₁ of the audio switching unit 4, the time remote adjustment The output P _{3 of the} unit 8 is applied to the terminal P ₂ of the audio switching unit 4 through the voice synthesizing unit 9 and then applied to the speaker SP through the voice signal processing unit 5 and the amplifier AMP, so that miswiring occurs. An alarm sound can be generated. Here, the signal detector 7 can detect after sufficiently switching the audio and video signals by performing a detecting operation after being delayed for a certain time.

Then, the output P ₂ ′ of the remote controller adjusting section 8 passes through the character generator 10 to control the CRT drive 3 to drive the cathode ray tube CRT, thereby causing a character called miswiring on the on-screen display of the screen. Since a person can detect a miswiring condition, the present invention can also be used in a circuit for checking for excessive radiation of radiation and abnormality of power supply voltage from various protection circuits used in TV.

As described above, according to the present invention, when the external signal is mis-wired, the signal is detected through the speaker and the cathode ray tube, and the multi-input can easily detect the mis-wiring state. An A / V miswiring warning device can be provided.

[Brief description of drawings]

The figure is an implementation circuit diagram of the present invention. 1 ... A / V switching unit, 2 ... video signal processing unit, 3 ... CRT drive, 4 ... audio switching unit, 5 ... sound signal processing unit, 6 ... A / V control logic, 7 ... Signal detector,
8: Remote control adjustment section.

Claims (1)

[Claims] 1. A control signal output from an A / V control logic element controls an A / V switching element, and video and audio signals applied from the inside and the outside are supplied to respective video signal processing elements and CRT drive elements. A TV / VTR system comprising a screen and a sound reproducing means for driving a cathode-ray tube through the screen and driving a speaker through an audio switching element, a sound signal processing element, and an amplifier element. It is configured between the V control logic element, CRT drive element, and audio switching element, and when miswiring, the output video signal and audio signal are detected by the output of the A / V control logic element so that the miswiring detection signal is output. The incorrect wiring detection means and the output of the incorrect wiring detection means pass through the remote control adjustment element, the character generator, and the voice synthesis element, and the CRT driver Miswiring warning device of multi-input A / V, characterized in that it is composed of a the faulty wiring sensing means to sense the wiring state erroneously by controlling the blanking element and audio switching element.