Zhen Yu Li

US Patent:

20100183070, Jul 22, 2010

Filed:

Aug 12, 2008

Appl. No.:

12/733149

Inventors:

Xiaoan Lu - Princeton NJ, US
Zhen Li - Burbank CA, US
Cristina Gomila - Princeton NJ, US

International Classification:

H04N 7/26

US Classification:

37524008, 375E07076

Abstract:

A method and apparatus are provided for improved video encoding using region of interest information. The apparatus includes an encoder for encoding a plurality of regions of a picture by determining, using region of interest detection, a respective probability that each of the plurality of regions belong to a region of interest, and adaptively controlling a respective quality of each of the plurality of regions based on a value of the respective probability.

US Patent:

20110129020, Jun 2, 2011

Filed:

Aug 8, 2008

Appl. No.:

12/737662

Inventors:

Zhen Li - Burbank CA, US
Adeel Abbas - Plainsboro NJ, US
Xiaoan Lu - Princeton NJ, US
Cristin Gomila - Princeton NJ, US

International Classification:

H04N 7/12

US Classification:

37524029, 375E0719

Abstract:

A method and apparatus for detecting banding artifacts in digital images and video contents. The method operates to (i) find the locations of the banding artifacts, (ii) determine the strength of the banding artifact per block, and (iii) determine overall banding artifact strength per picture. The banding artifact detection and strength assignment is done by first finding areas that are prone to banding artifact and then considering the local characteristics of the area to reduce the false detection. The banding artifact strength of a picture is determined by considering the size and the strength of the artifact areas in this picture as well as the artifact strength in the neighboring pictures.

US Patent:

20110135012, Jun 9, 2011

Filed:

Aug 8, 2008

Appl. No.:

12/737661

Inventors:

Zhen Li - Burbank CA, US
Adeel Abbas - Plainsboro NJ, US
Xiaoan Lu - Princetyon NJ, US
Cristina Gomila - Princeton NJ, US

International Classification:

H04N 11/02

US Classification:

37524029, 375E07026

Abstract:

The present invention involves detecting dark noise artifacts in coded images and video. Locations of artifacts in compressed pictures are found. A strength of the artifact per block is determined as is an overall dark noise artifact strength for each picture. Artifact detection and strength assignment is performed by analyzing candidate areas that could be prone to this type of artifact. Multiple features such as block variance, color information, luminance levels and location of the artifact could be used in this process. Also, median filtering may be used on the identified areas to eliminate isolated areas. A final artifact parameter for each picture can be assessed based on the total number of blocks that are classified as dark noise and also the strength of each macroblock.

US Patent:

20110194618, Aug 11, 2011

Filed:

Apr 21, 2011

Appl. No.:

13/091311

Inventors:

Walter Gish - Oak Park CA, US
Zhen Li - Cupertino CA, US
Christopher Vogt - Laguna Niguel CA, US

Assignee:

DOLBY LABORATORIES LICENSING CORPORATION - San Francisco CA

International Classification:

H04N 7/26

US Classification:

37524025, 375E07027

Abstract:

A first image stream has a first dynamic range and a first color space. First and the second image streams are received in a layered codec. The second image stream has a second dynamic range, which is higher than the first dynamic range. The first image stream is in the codec's base layer; the second image stream is in its enhancement layer. The first image stream is encoded to obtain an encoded image stream, which is decoded to obtain a decoded image stream. The decoded image stream is converted from the first non-linear or linear color space to a second, different color space to obtain a color converted image stream. A higher dynamic range image representation of the color converted image stream is generated to obtain a transformed image stream. Inverse tone mapping parameters are generated based on the transformed image stream and the second image stream.

US Patent:

20130148029, Jun 13, 2013

Filed:

Aug 23, 2011

Appl. No.:

13/818288

Inventors:

Walter Gish - Oak Park CA, US
Zhen Li - Cupertino CA, US
Donald Pian - San Diego CA, US
Christopher Vogt - Laguna Niguel CA, US
Hyung-Suk Kim - Valencia CA, US
David Ruhoff - Marina del Rey CA, US

Assignee:

Dolby Laboratories Licensing Corporation - San Francisco CA

International Classification:

H04N 9/67

US Classification:

348708

Abstract:

Enhancing image dynamic range is described. An input video signal that is represented in a first color space with a first color gamut, which is related to a first dynamic range, is converted to a video signal that is represented in a second color space with a second color gamut. The second color space is associated with a second dynamic range. At least two (e.g., three) color-related components of the converted video signal are mapped over the second dynamic range.

US Patent:

20220305046, Sep 29, 2022

Filed:

Jun 5, 2020

Appl. No.:

17/616292

Inventors:

- Pasadena CA, US
Dawn Christianson - Pasadena CA, US
James C. Hamilton - Arcadia CA, US
Zhen Li - La Jolla CA, US
Rui Zhu - San Diego CA, US
Christine Wooddell - Madison WI, US
Tao Pei - Madison WI, US

Assignee:

Arrowhead Pharmaceuticals, Inc. - Pasadena CA

International Classification:

A61K 31/713
A61K 45/06
A61P 1/16

Abstract:

Described are methods for treating alpha-1 antitrypsin deficiency (AATD) in a human patient in need of treatment, using pharmaceutical compositions that include AAT RNAi agents. The pharmaceutical compositions disclosed herein that include AAT RNAi agents, when administered to a human patient in need thereof, treat liver diseases associated with AAT deficiency such as chronic hepatitis, cirrhosis, increased risk of hepatocellular carcinoma, transaminitis, cholestasis, fibrosis, fulminant hepatic failure, and other liver-related diseases.