发明授权
US07106909B2 Method and apparatus for encoding image data in accordance with a target data size
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根据目标数据大小对图像数据进行编码的方法和装置
- 专利标题： Method and apparatus for encoding image data in accordance with a target data size
- 专利标题（中）： 根据目标数据大小对图像数据进行编码的方法和装置
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申请号： US10298657申请日： 2002-11-19
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公开(公告)号： US07106909B2公开(公告)日： 2006-09-12
- 发明人: Makoto Satoh , Yukio Chiba , Satoshi Naito
- 申请人： Makoto Satoh , Yukio Chiba , Satoshi Naito
- 申请人地址： JP Tokyo
- 专利权人： Canon Kabushiki Kaisha
- 当前专利权人： Canon Kabushiki Kaisha
- 当前专利权人地址： JP Tokyo
- 代理机构： Fitzpatrick, Cella, Harper & Scinto
- 优先权： JP2001-392642 20011225; JP2002-010390 20020118; JP2002-188356 20020627
- 主分类号： G06K9/36
- IPC分类号： G06K9/36
摘要：
An encoder (103) encodes image data using a first parameter Q1, and a re-encoder (107) re-encodes the encoded result of the encoder (103) using a second parameter Q2. When the encoded data size obtained by the encoder (103) exceeds a predetermined size, Q1 is replaced by Q2, and encoded data streams previously encoded by the re-encoder (107) are saved in a buffer (108) as those encoded by the encoder (103) after the parameter is changed. Upon executing a re-encoding process, the re-encoder (107) re-encodes encoded data streams previously encoded by the re-encoder (107) using a parameter that can assure a higher compression ratio than Q2.