Audio/video signal input terminal circuit with automatic switchi

Details Audio/video signal input terminal circuit with automatic switchi Audio/video signal input terminal circuit with automatic switchi

1993-03-11

1994-04-19

Groody, James J.

Television

Format

Including additional information

348705, H04N 5268, H04N 560

Patent

active

053051050

ABSTRACT:
An audio/video signals input terminal circuit comprising an input terminal section having a plurality of input terminals, a select control signal generating circuit for detecting the presence of a synchronous signal at the input terminals of the input terminal section and generating first and second select control signals in accordance with the detected result, an audio/video input switching circuit having a plurality of input port sets and a plurality of output ports, the audio/video input switching circuit selecting one of the input port sets inputting a video signal in response to the first and second select control signals, outputting the video signal inputted through the selected input port set through the corresponding output port and outputting right and left audio signals inputted through the other input port sets through the corresponding output ports, respectively, and an audio input switching circuit having a pair of input port sets and a pair of output ports, the audio input switching circuit selecting one of the input port sets in response to a select control signal which is generated from a microcomputer according to a user's selection and outputting the right and left audio signals inputted through the selected input port set through the corresponding output ports, respectively.

REFERENCES:
patent: 4907085 (1990-03-01), Bingham
patent: 4954880 (1990-09-01), Tanimizu
patent: 5018013 (1991-05-01), Rabii

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