Patent ID: 6219485
Filing Date: 2001-04-17
Classification: H04N

Abstract:
A method, for use in a video cassette recorder (VCR) system, for automatically adjusting an amplitude of a color burst signal in a chrominance signal of a composite video signal read by a reproducing head from a magnetic tape, the method comprising the steps of:(a) detecting the chrominance signal from the composite video signal;(b) extracting the color burst signal from the chrominance signal by using a burst gate pulse generated by a burst gate pulse generator in the VCR system;(c) converting the color burst signal into that having a digital value corresponding thereto and comparing an amplitude of the converted color burst signal with a predetermined threshold value to provide a device control signal corresponding to the comparison result; and(d) in response to the device control signal, selectively deemphasizing the color burst signal to a predetermined level and outputting either one of the deemphasized color burst signal and the color burst signal extracted at the step (b).