发明名称 |
RATE AND QUALITY CONTROLLER FOR H.264/AVC VIDEO CODER AND SCENE ANALYZER THEREFOR |
摘要 |
A rate control system is disclosed for video coding applications. The rate controller assigns a quantization parameter for video data in a picture in response to complexity indicators indicative of spatial complexity, motion complexity and/or bits per pel of the picture. A virtual buffer based quantizer parameter is proposed based on a virtual buffer fullness analysis and a target rate estimate, which is derived from the complexity indicators. A second quantizer parameter is proposed from a linear regression analysis of quantizer parameters used to code previously coded pictures of similar type (e.g., I pictures, P pictures or B pictures). A coding policy decision unit defines a final quantizer parameter from a comparison of the two proposed quantizer parameters. |
申请公布号 |
WO2005084035(A2) |
申请公布日期 |
2005.09.09 |
申请号 |
WO2005US00067 |
申请日期 |
2005.01.05 |
申请人 |
APPLE COMPUTER, INC. |
发明人 |
PURI, ATUL;HASKELL, BARIN, GEOFFRY;DUMITRAS, ADRIANA;NORMILE, JAMES;WU, HSI-JUNG;NIE, XIAOCHUN |
分类号 |
H04N7/26 |
主分类号 |
H04N7/26 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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