发明授权
US08712783B2 Entropy encoding and decoding using direct level and run-length/level context-adaptive arithmetic coding/decoding modes
有权
使用直接级和游程长度/级别上下文自适应算术编码/解码模式进行熵编码和解码
- 专利标题： Entropy encoding and decoding using direct level and run-length/level context-adaptive arithmetic coding/decoding modes
- 专利标题（中）： 使用直接级和游程长度/级别上下文自适应算术编码/解码模式进行熵编码和解码
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申请号： US13306761申请日： 2011-11-29
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公开(公告)号： US08712783B2公开(公告)日： 2014-04-29
- 发明人: Sanjeev Mehrotra , Wei-Ge Chen
- 申请人： Sanjeev Mehrotra , Wei-Ge Chen
- 申请人地址： US WA Redmond
- 专利权人： Microsoft Corporation
- 当前专利权人： Microsoft Corporation
- 当前专利权人地址： US WA Redmond
- 代理商 Aaron Chatterjee; Andrew Sanders; Micky Minhas
- 主分类号： G10L19/02
- IPC分类号： G10L19/02 ; H03M7/46 ; H03M7/48
摘要：
An encoder performs context-adaptive arithmetic encoding of transform coefficient data. For example, an encoder switches between coding of direct levels of quantized transform coefficient data and run-level coding of run lengths and levels of quantized transform coefficient data. The encoder can determine when to switch between coding modes based on a pre-determined switch point or by counting consecutive coefficients having a predominant value (e.g., zero). A decoder performs corresponding context-adaptive arithmetic decoding.
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