Invention Grant
US08090574B2 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
- Patent Title: Entropy encoding and decoding using direct level and run-length/level context-adaptive arithmetic coding/decoding modes
- Patent Title (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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Application No.: US12907848Application Date: 2010-10-19
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Publication No.: US08090574B2Publication Date: 2012-01-03
- Inventor: Sanjeev Mehrotra , Wei-Ge Chen
- Applicant: Sanjeev Mehrotra , Wei-Ge Chen
- Applicant Address: US WA Redmond
- Assignee: Microsoft Corporation
- Current Assignee: Microsoft Corporation
- Current Assignee Address: US WA Redmond
- Agency: Klarquist Sparkman, LLP
- Main IPC: G10L19/02
- IPC: G10L19/02 ; H03M7/46 ; H04B1/66
Abstract:
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.
Public/Granted literature
- US20110035225A1 ENTROPY CODING USING ESCAPE CODES TO SWITCH BETWEEN PLURAL CODE TABLES Public/Granted day:2011-02-10
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