KR970031991A - Automatic Video Mute Device for Television Receiver - Google Patents

Abstract

The present invention relates to an automatic video muting apparatus of a television receiver that is capable of automatically muting the video output based on the AGC voltage level when a weak signal channel having a weak reception sensitivity is selected during channel switching. A television receiver having automatic gain control means for outputting an automatic gain control voltage for controlling the gain of a broadcast signal based on a level of a video signal, wherein the voltage level output from the automatic gain control means is equal to or less than a predetermined level. Automatic gain voltage level detection means for outputting a detection signal of a second level in the case of the first level and a predetermined level or more, and when the detection signal of the second level is input by the automatic gain voltage level detection means, a mute signal is outputted by the CRT It characterized in that it comprises a control means for muting the video signal output through.

Description

Automatic Video Mute Device for Television Receiver

Since this is an open matter, no full text was included.

2 is a block diagram showing an automatic video muting apparatus for a television receiver according to a first embodiment of the present invention.

Claims (4)

A television receiver having automatic gain control means for outputting an automatic gain control voltage for controlling the gain of a broadcast signal based on the detected video signal level, wherein the voltage level output from the automatic gain control means is equal to or less than a predetermined level. In the case of the first level and the predetermined level or more, the automatic gain voltage level detection means for outputting the detection signal of the second level, and the mute signal is output when the detection signal of the second level is input by the automatic gain voltage level detection means. And a control means for muting the video signal output through the CRT. The television receiver as claimed in claim 1, wherein said automatic gain voltage level detecting means comprises a comparator for comparing a predetermined reference level with said automatic gain control voltage and outputting a voltage signal according to the comparison result. Automatic video muting device. In a television receiver having an automatic gain control voltage for outputting an automatic gain control voltage for controlling gain of a broadcast signal based on the detected video signal level, the voltage level output from the automatic gain control means is converted into digital data. Analog / digital conversion means for conversion, reference data storage means for storing a predetermined reference data value, and input data values applied from the analog / digital conversion means and reference data values stored in the reference data storage means are compared. And a control means for outputting a video mute signal when the input data value is larger than the reference data value. 4. The apparatus of claim 3, further comprising display means for displaying a reference data value stored in the reference data storage means on a CRT, and data changing means for changing a data value stored in the reference data storage means by the viewer. Automatic video mute device of a television receiver, characterized in that configured. ※ Note: The disclosure is based on the initial application.