公开(公告)号：DE602004025647D1

公开(公告)日：2010-04-08

申请号：DE602004025647

申请日：2004-05-13

Applicant: ST MICROELECTRONICS ASIA

Inventor： HUANG YONG ,  CHIANG PATRICIA WEI YIN MS ,  HUI LUCAS Y W ,  GOH KWONG HUANG

IPC: H04N9/64 ,  H04N5/20 ,  H04N5/52 ,  H04N9/68 ,  H04N9/77

Abstract: A method of colour saturation compensation in a video signal is disclosed. The method includes the steps of: processing a luminance signal component of the video signal; determining whether the processing of the luminance signal results in a change in chrominance saturation; if the step of determining reveals that the chrominance saturation has changed, applying a chrominance compensation signal to the chrominance signals to counteract the effects of chrominance saturation, wherein said step of applying a compensation signal include the steps of: generating a compensation signal which is dependent on hue and luminance ratio (output luminance signal / input luminance signal). Apparatus for performing the method is also disclosed.