发明授权
US07095784B2 Method and apparatus for moving picture compression rate control using bit allocation with initial quantization step size estimation at picture level
有权
使用比特分配运动图像压缩率控制的方法和装置，在图像级别具有初始量化步长估计
- 专利标题： Method and apparatus for moving picture compression rate control using bit allocation with initial quantization step size estimation at picture level
- 专利标题（中）： 使用比特分配运动图像压缩率控制的方法和装置，在图像级别具有初始量化步长估计
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申请号： US10412325申请日： 2003-04-14
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公开(公告)号： US07095784B2公开(公告)日： 2006-08-22
- 发明人: Yung-Ching Chang , Chia-Chieh Chen , Teng-Kai Wang
- 申请人： Yung-Ching Chang , Chia-Chieh Chen , Teng-Kai Wang
- 申请人地址： TW Hsin Chu
- 专利权人： Silicon Intergrated Systems Corp.
- 当前专利权人： Silicon Intergrated Systems Corp.
- 当前专利权人地址： TW Hsin Chu
- 代理机构： Birch, Stewart, Kolasch, and Birch, LLP
- 主分类号： H04N7/12
- IPC分类号： H04N7/12
摘要：
A method and apparatus for rate control in moving picture compression. Bit allocation with initial quantization step size estimation is used at picture level. With the relationship between pre-analyzed activity of current picture to be encoded and actual complexity of previously encoded picture of the same type, a target bit budget can be allocated to the current picture in accordance with the present invention. Once the target bit budget has been determined, an initial value for an average quantization step size is estimated on the basis of the target bit budget, along with the relationship between pre-analyzed activity of current picture and actual complexity of previously coded picture. Such an initial value of the average quantization step size is useful to achieve higher picture quality at a given bit allocation.