Sheng De Jang

US Patent:

8237863, Aug 7, 2012

Filed:

Jan 12, 2009

Appl. No.:

12/352542

Inventors:

Sheng De Jang - Cupertino CA, US

Assignee:

Huaya Microelectronics - Shanghai

International Classification:

H03M 1/12
H04N 5/08
H04N 5/52

US Classification:

348572, 348528, 348678

Abstract:

An adaptive gain and offset control for a digital video analog to digital converter is provided. A gain indicator and/or an offset indicator, which are used as inputs control signals to an analog-to-digital converter, are determined based on a detected maximum level and a detected blanking level from an input video signal. The gain and offset indicators may be determined independently from a minimum level of the video signal.

US Patent:

8238443, Aug 7, 2012

Filed:

Jan 12, 2009

Appl. No.:

12/352593

Inventors:

Sheng De Jang - Cupertino CA, US
Qi Jiang - Shanghai, CN
Hsui Min Wong - Shanghai, CN

Assignee:

Huaya Microelectronics - Shanghai

International Classification:

H04N 7/12

US Classification:

37524027, 37524028, 348503

Abstract:

In one example, a digital video resampler and decoder is disclosed. An input buffer is coupled to a source of a video signal oversampled by at least two times. A horizontal synchronization detector is coupled to the input buffer, and detects horizontal synchronization boundaries. A counter is coupled to the horizontal synchronization detector to count a number of samples between horizontal synchronization boundaries. A comparator is coupled to the counter and compares the counted number of samples to a reference count. A sample corrector is coupled to the input buffer and modifies a block of samples based on a result from the comparator. An output buffer is coupled to the sample corrector to hold the modified block of samples. A comb filter is coupled to the output buffer, and generates first and second three-dimensional color values based on the modified block of samples.

US Patent:

8363734, Jan 29, 2013

Filed:

Jan 12, 2009

Appl. No.:

12/352607

Inventors:

Sheng De Jang - Cupertino CA, US
Hsiu Min Wong - Shanghai, CN
Zu Jun Liang - Shanghai, CN
Qing Yang - Shanghai, CN

Assignee:

Huaya Microelectronics - Shanghai

International Classification:

H04N 7/12

US Classification:

37524029, 37524012, 348663

Abstract:

A multi-directional comb filtering in a digital video decoder is provided.

US Patent:

20090180027, Jul 16, 2009

Filed:

Jan 12, 2009

Appl. No.:

12/352585

Inventors:

Sheng De Jang - Cupertino CA, US
Hsiu Min Wong - Shanghai, CN
Peng Xiao - Shanghai, CN

Assignee:

HUAYA MICROELECTRONICS, INC. - San Jose CA

International Classification:

H04N 9/66

US Classification:

348639, 348E09046

Abstract:

A digital video decoder architecture is provided wherein chrominance values are determined first, then luminance values are determined, in part, based on the previously determined chrominance values. In this architecture, luminance separation occurs after and based on