Invention Grant
- Patent Title: Video image compression using unequal weights
- Patent Title (中): 视频图像压缩使用不相等的权重
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Application No.: US12644953Application Date: 2009-12-22
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Publication No.: US08477851B2Publication Date: 2013-07-02
- Inventor: Gary A. Demos
- Applicant: Gary A. Demos
- Applicant Address: US CA San Francisco
- Assignee: Dolby Laboratories Licensing Corporation
- Current Assignee: Dolby Laboratories Licensing Corporation
- Current Assignee Address: US CA San Francisco
- Agency: Fish & Richardson P.C.
- Main IPC: H04N7/18
- IPC: H04N7/18

Abstract:
Techniques for video image compression in a video system involve providing a sequence of frames including picture regions, and determining first unequal weights, in which the first unequal weights are used to determine pixel luminance values of a picture region of at least one of the frames. The techniques involve determining second unequal weights, where the second unequal weights are used to determine pixel chroma values of the picture region of at least the one frame. The first unequal weights can include AC weights, and the second unequal weights can include DC weights. A representation of pixel luminance values can differ from a representation of pixel chroma values. The techniques for determining the first unequal weights can involve accessing representative transformations for the pixel luminance values, and the techniques for determining the second unequal weights can involve accessing representative transformations for the pixel chroma values.
Public/Granted literature
- US20100118957A1 Video Image Compression Using Unequal Weights Public/Granted day:2010-05-13
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