KR960028257A

KR960028257A - Automatic Video Switching Control Device

Info

Publication number: KR960028257A
Application number: KR1019940039640A
Authority: KR
Inventors: 이정우
Original assignee: 배순훈; 대우전자 주식회사
Priority date: 1994-12-30
Filing date: 1994-12-30
Publication date: 1996-07-22

Abstract

본 발명은 자동 비디오절환 제어장치에 관한 것으로, 방송신호의 출력과 다수의 외부비디오신호의 스위칭출력이 가능한 A/V스위칭수단과, 그 A/V스위칭수단에서 스위칭적으로 출력되는 비디오신호의 동기신호를 검출하는 동기검출수단, 그 동기검출수단에 의해 검출된 비디오신호의 동기신호에 의해 제어되어 비디오신호의 출력상태를 검출하는 비디오출력상대 검출수단, 그 비디오출력상태 검출수단에 의해 비디오출력이 검출되지 않는 경우 계시동작을 개시하여 그 계시결과를 출력하는 타이머수단, 그 타이머수단에 의해 제공되는 계시결과에 따라 상기 A/V스위칭수단의 비디오접속상태를 스캐닝제어하는 제어수단을 포함하여 구성되고, 상기 제어수단이 상기 타이머의 계시결과가 비디오신호의 출력에 따라 리세트되기까지 상기 A/V스위칭수단의 비디오입력포트를 스캐닝제어하여 정확한 비디오입력포트를 탐색하도록 된 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic video switching control device, comprising: A / V switching means capable of outputting a broadcast signal and switching output of a plurality of external video signals, and synchronization of a video signal output switchably from the A / V switching means. Video output relative detection means for detecting the output state of the video signal controlled by the synchronous signal of the video signal detected by the synchronous detection means, and for outputting the video output by the video output state detection means. Timer means for initiating a clocking operation and outputting the clocking result if not detected, and controlling means for scanning and controlling the video connection state of the A / V switching means in accordance with the clocking result provided by the timer means; And the control means controls the A / V switching means until the timer's timed result is reset according to the output of the video signal. The video input port is scanned and controlled to find the correct video input port.

Description

Automatic Video Switching Control Device

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.

제1도는 본 발명에 따른 자동 비디오절환 제어장치의 구성을 나타낸 도면이다.1 is a diagram showing the configuration of an automatic video switching control apparatus according to the present invention.

Claims

A / V switching means having an audio / video input port capable of outputting a broadcast signal and switching output of a plurality of external video signals, and synchronizing to detect a synchronous signal of a video signal that is switched output from the A / V switching means. Detection means, video output relative detection means controlled by the synchronous signal of the video signal detected by the synchronous detection means to detect the output state of the video signal, and time signal when the video output is not detected by the video output state detection means. An automatic video comprising a timer means for starting an operation and outputting the time result, and a control means for scanning and controlling the video connection state of the A / V switching means in accordance with the time result provided by the timer means. Changeover control.

2. The video output state detecting means of claim 1, wherein the video output state detecting means comprises: a first transistor conducting controlled by a video output designating signal designated by the control means, and a second transistor conducting controlled by a synchronous signal detected by the synchronous detecting means; And a third transistor for conducting control in accordance with the output state of the second transistor and outputting a signal indicating the video output state.

2. The automatic video switching control apparatus according to claim 1, wherein the control means scans and controls the video input port of the A / V switching means until the timed result of the timer is reset according to the output of the video signal.

※ Note: The disclosure is based on the initial application.