Digitised analogue half image video signal noise reduction procedure for car televisions compares line noise levels and substitutes adjacent line if too high

摘要

A digitised analogue half image video signal noise reduction procedure compares line noise levels with reference values or another row in either half image and replaces it by repeating a spatial statistic method selected adjacent row if it has high noise or impulse disturbances. Independent claims are included for signal processing circuits implementing the procedure.