Patent ID: 6323913
Filing Date: 2001-11-27
Classification: H04N

Abstract:
A circuit configuration for color coding and decimation for a video signal having a color component, comprising:an analog-to-digital converter receiving a video signal with a color component, said analog-to-digital converter generating a digitized video signal and having an output;a recovery device connected to said analog-to-digital converter for recovering from the video signal a carrier coupled to a color subcarrier frequency;a multiplier connected to said recovery device for multiplicatively combining the carrier recovered in said recovery device with a digitized video signal generated by said analog-to-digital converter, and for thereby generating a first signal component and a second signal component;a first low-pass filter having an input connected directly to said output of said analog-to-digital converter, said first low-pass filter having a passband below the color component in a frequency spectrum of the video signal, filtering the digitized video signal, and generating a luminance signal component;a second low-pass filter having an input connected directly to said multiplier, said second low-pass filtering the first signal component and generating therefrom a first chrominance signal component;a third low-pass filter having an input connected directly to said multiplier, said third low-pass filter filtering the second signal component and generating therefrom a second chrominance signal component;wherein the luminance signal component and the first and second chrominance signal components output by said first, second and third low-pass filters, respectively, have sampling rates which are reduced relative to sampling rates of their respective input signals, as defined by a degree of decimation.