DEVICE FOR ENHANCING THE SIGNAL-TO-NOISE RATIO OF THE COLOR CHANNEL IN A DIGITAL TELEVISION RECEIVER

摘要

The present invention relates to a device included in the processing channel of the chromodynamic signal. Such a device is characterized by an ADAPTIVE FIR FILTER 38, 39 for filtering the chromium signal and by means 32, 36; 33, 37 FREQUENCY-SENSITIVE SENSORS OF THE MOST COMMON CHROMINANCE SIGNAL TO PRODUCE COEFFICIENTS TO PERIODICALLY REPROGRAM THE FILTER 38; 39 ACCORDING TO THE CURRENT SUPERIOR FREQUENCY RANGE OF THE CHROMINANCE SIGNAL CURRENTLY THUS THE FILTER BANDWIDTH HAS A MINIMUM RELATIVE TO PASS THE CHROMINANCE SIGNAL. / P P THE PRESENT INVENTION FINDS APPLICATION TO IMPROVE THE SIGNAL RATIO COLOR CHANNEL NOISE IN A DIGITAL TELEVISION RECEIVER. / P