Faroudja Enterprises, Inc.

Daniel Campbell

Yves C Faroudja

Xu Dong

A novel de-blocking and de-banding filter and a related method of operation reduce and/or remove blocking and banding artifacts that originate from a low bitrate video compression. For filtering a luminance channel, the de-blocking and de-banding filter determines filtering needs and also adjusts filtering strengths based on a compression level (Q) and a gray level of the video signal. For filtering a chrominance channel, the de-blocking and de-banding filter determines the filtering needs and adjusts the filtering strengths based on Qalone. Preferably, the de-blocking and de-banding filter utilizes a low pass filter of adjustable strength at a border of a block perpendicular to the border or a band border. The adjustable strength of the de-blocking and de-banding filter is a function of the compression level (Q) and/or the gray level of the video signal, but does not depend on a duration of the blocking and/or banding artifacts.

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Los Altos, CA, United States of America

Daniel Campbell