发明授权
US08041131B2 Variable length coding of coefficient clusters for image and video compression
有权
用于图像和视频压缩的系数簇的可变长度编码
- 专利标题: Variable length coding of coefficient clusters for image and video compression
- 专利标题(中): 用于图像和视频压缩的系数簇的可变长度编码
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申请号: US12030821申请日: 2008-02-13
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公开(公告)号: US08041131B2公开(公告)日: 2011-10-18
- 发明人: Junlin Li , Ghassan AlRegib , Wen-hsiung Chen , Dihong Tian , Pi Sheng Chang
- 申请人: Junlin Li , Ghassan AlRegib , Wen-hsiung Chen , Dihong Tian , Pi Sheng Chang
- 申请人地址: US CA San Jose
- 专利权人: Cisco Technology, Inc.
- 当前专利权人: Cisco Technology, Inc.
- 当前专利权人地址: US CA San Jose
- 代理机构: INVENTEK
- 代理商 Dov Rosenfeld
- 主分类号: G06K9/36
- IPC分类号: G06K9/36
摘要:
A coding method, apparatus, and medium with software encoded thereon to implement a coding method. The coding method includes encoding cluster of consecutive non-zero-valued coefficients, the encoding of a cluster including jointly encoding joint events that each are defined by at least two parameters: the number of zero-valued coefficients preceding the cluster, and the number of non-zero-valued coefficients in the cluster. The encoding of the cluster also includes encoding a parameter indicative of the number of amplitude-1 trailing non-zero-valued coefficients in the cluster, in one version with the parameter indicative of the number of trailing amplitude-1 coefficients part of the joint events such that the coding is according to a 3-dimensional joint variable length coding table. The method further includes encoding the amplitudes of the non-zero-valued coefficients that are not encoded by the joint encoding, e.g., encoding the amplitudes of the other than the trailing amplitude-1 coefficients.
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