Television receiver allowing playback of HDTV recording - holds signal at black level to prevent image interference during vertical blanking

摘要

The television receiver prevents image interference during the vertical blanking intervals by holding the line flyback signal at the black level. When the television signals for the receiver are provided by a video recorder. - The time interval during which the signal is held at the black level includes the time required for switching between magnetic heads. - Alternatively the time interval includes the lines incorporating the video text signals, or test signals etc..