NOISE REMOVE CIRCUIT

摘要

The apparatus selectively dampens noise of received luminance signal for a video signal processing system. The apparatus comprises a level limiter for limiting amplitude levels of the luminance signals and a noise dampening processor connected to the level limiter, for dampening noises of the luminance signals resulted form a transmission channel to provide processed luminance signals. A buffer is connected to the level limiter, for buffering the luminance signals to provide buffered luminance signals and an average detector detects average amplitude levels of the luminance signals to provide an average signal. A comparator compares the average signal to reference signal to provide a control signal and a switch selector selects one of the control signal and a user selected signal to provide a selected control signal, and a switch for enabling transmission of one of the processed luminance signals and the buffered luminance signals in dependence upon reception of the selected control signal.