Yi Liang

7830960, Nov 9, 2010

Jan 13, 2005

11/036447

Yi Liang - San Diego CA, US
Stephen Molloy - Carlsbad CA, US

QUALCOMM Incorporated - San Diego CA

H04N 7/12

37524012, 37524013, 37524014, 37524015, 37524001, 37524025, 37524026

In one embodiment, this disclosure provides an encoding device comprising a mode selection engine that performs mode selection for intra-prediction encoding regardless of whether the encoding device is programmed to comply with first encoding standard or a second encoding standard. The device also includes a first encoder to perform the intra-prediction encoding according to the selected mode in compliance with the first encoding standard when the encoding device is programmed to comply with the first encoding standard, and a second encoder to perform the intra-prediction encoding according to the selected mode in compliance with the second encoding standard when the encoding device is programmed to comply with the second encoding standard. The techniques can simplify mode selection in support of multiple different intra-prediction encoding standards.

7881386, Feb 1, 2011

Sep 30, 2004

10/957512

Yi Liang - San Diego CA, US
Khaled Helmi El-Maleh - San Diego CA, US

Qualcomm Incorporated - San Diego CA

H04N 7/12

37524024, 37524012, 37524016, 37524018, 37524013, 348416, 3484151, 3484121

Methods and apparatus are presented for reducing the computational complexity of coding mode decisions by exploiting the correlations across spatially and/or temporally close coding mode decisions. A mode decision for a current macroblock is based on the mode decisions of spatially and/or temporarily close macroblocks.

8018472, Sep 13, 2011

Jun 8, 2006

11/450621

Scott Howard King - Poway CA, US
Suhail Jalil - Poway CA, US
Yi Liang - San Diego CA, US

QUALCOMM Incorporated - San Diego CA

G09G 5/00

345638

Image processing techniques are described that reduce the amount of bandwidth required to read an image from memory for display. According to the techniques, a processor stores low change rate display layers in a memory such that a processor can read the display layers from the memory using a reduced amount of processing resources. An overlay module blends low change rate display layers into a combined overlay layer. A processor reads the overlay layer from the memory and selectively processes the overlay layer based on processing information for the overlay layer recorded in memory. The processor then blends the overlay layer and a high change rate video display layer to update a single image for display according to a high change rate. In addition, the overlay module updates the overlay layer based on the low change rate display layers according to a low change rate.

8514933, Aug 20, 2013

Jul 29, 2005

11/193249

Yi Liang - San Diego CA, US
Khaled Helmi El-Maleh - San Diego CA, US

QUALCOMM Incorporated - San Diego CA

H04N 7/12

37524003, 37524016

The disclosure is directed to adaptive frame skipping techniques for rate controlled video encoding of a video sequence. According to the disclosed techniques, an encoder performs frame skipping in an intelligent manner that can improve video quality of the encoded sequence relative to encoding using conventional frame skipping. In particular, the disclosed frame skipping scheme is adaptive and considers motion activity of the video frames in order to identify certain frames that can be skipped without sacrificing significant video quality. The described frame skipping techniques may take into account the tradeoff between spatial and temporal quality of different video frames. In this manner, the techniques can allocate limited resources between the spatial and temporal quality in a way that can improve the visual appearance of a video sequence.

8045615, Oct 25, 2011

May 25, 2005

11/136980

Yi Liang - San Diego CA, US
Sharath Manjunath - San Diego CA, US

Qualcomm Incorporated - San Diego CA

H04B 1/66

37524003, 37524029, 37524026, 37524025, 37524012, 37524013, 37524005, 382238, 382235, 382260, 382233, 382251, 382236

This disclosure describes deblock filtering techniques in which an in-loop deblock filter of a first codec is used as a post deblock filter of a second codec. A number of techniques are also described to facilitate input parameter adjustments and allow for the effective use of the filter with both codecs. The techniques can simplify the architecture of a device that includes multiple codecs operating according to different coding standards. Specifically, the different codecs can use the same deblocking filter regardless of whether the coding standard calls for in-loop filtering or whether post filtering is used. For example, a filter designed as an in-loop deblocking filter for a codec that complies with the ITU-T H. 264 coding standard can be used as a post deblocking filter for MPEG-4 video.

20020071628, Jun 13, 2002

Dec 7, 2000

09/733206

De Yu Zang - Irvine CA, US
Xinhong Wang - San Diego CA, US
Yi Liang - San Diego CA, US
Jin-Yi Pan - San Diego CA, US

G02B006/35

385/017000, 385/016000

A thermal optical switching system has two optical outputs from each of the thermal optical switches in the last column of an optical switch matrix to switch the optical outputs between an on state, an off state and a split power state.

20020076133, Jun 20, 2002

Feb 20, 2001

09/789368

Xun Li - Waterloo, CA
Wei-Ping Huang - Ancaster, CA
Chenglin Xu - Burlington, CA
Yi Liang - San Diego CA, US

G02B006/35
G02B006/12
G02B006/10

385/016000, 385/017000, 385/014000, 385/129000

A guided wave optical switch having a passive optical component optically coupled to a low gain optical amplifier—both being formed monolithically in a semiconductor substrate. The passive optical component may comprise a single-mode -3 dB optical power splitter that receives at an input an optical signal and splits that optical signal approximately equally between two outputs. The passive optical component may also comprise an optical isolator, an optical circulator, and other known passive optical devices. The low gain optical amplifier includes a waveguide having an active region that may provide optical signal gain when excited by an electrical current provided by a metal or metallic electrode connected to the active region. The active region may be a bulk active region, a multiple quantum well active region, or the waveguide may comprise a buried heterojunction waveguide having either a bulk or multiple quantum well active region.

20060078051, Apr 13, 2006

Dec 28, 2004

11/025297

Yi Liang - San Diego CA, US
Khaled El-Maleh - San Diego CA, US
Sharath Manjunath - San Diego CA, US

H04N 11/04
H04N 7/12
H04B 1/66
H04N 11/02

375240240, 375240120

An adaptive Intra-refresh (IR) technique for digital video encoding adjusts IR rate based on video content, or a combination of video content and channel condition. The IR rate may be applied at the frame level or macroblock (MB) level. At the frame level, the IR rate specifies the percentage of MBs to be Intra-coded within the frame. At the MB level, the IR rate defines a statistical probability that a particular MB is to be Intra-coded. The IR rate is adjusted in proportion to a combined metric that weighs estimated channel loss probability, frame-to-frame variation, and texture information. The IR rate can be determined using a close-form solution that requires relatively low implementation complexity. For example, such a close-form does not require iteration or an exhaustive search. In addition, the IR rate can be determined from parameters that are available before motion estimation and compensation are performed.