公开(公告)号：SG115542A1

公开(公告)日：2005-10-28

申请号：SG200303239

申请日：2003-05-21

Applicant: ST MICROELECTRONICS ASIA

Inventor： PATRICIA CHIANG WEI YIN ,  LUCAS Y W HUI

IPC: G06T5/00 ,  G06T5/20 ,  H04N5/14 ,  H04N5/21 ,  H04N9/77

Abstract: A processor for enhancing an input luminance signal including: a means for calculating a chroma edge value associated with the input luminance signal; a means for measuring a luminance gradient associated with the input luminance signal; a peaking filter for processing the input luminance signal; a gain adjustment circuit having a gain function that is adjustable relative to the calculated chroma edge value, the gain adjustment circuit being operable to adjust the magnitude of the output of the peaking filter wherein: in a first range of luminance gradients, the output is an attenuated version of the input; in a second range of luminance gradients the output is directly proportional to the input; in a third range of luminance gradients, the output is inversely proportional to the input; wherein said enhanced luminance signal is the sum of the input and output of the peaking filter.

公开(公告)号：SG115543A1

公开(公告)日：2005-10-28

申请号：SG200303347

申请日：2003-05-17

Applicant: ST MICROELECTRONICS ASIA

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

IPC: H04N5/52 ,  H04N9/64 ,  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.

公开(公告)号：SG105533A1

公开(公告)日：2004-08-27

申请号：SG200200600

申请日：2002-01-31

Applicant: ST MICROELECTRONICS ASIA

Inventor： WEI YIN PATRICIA CHIANG ,  LUCAS Y W HUI

IPC: H04N7/26 ,  H04N7/50