发明授权
US07336711B2 Image encoding method, image decoding method, image encoder, image decode, program, computer data signal, and image transmission system
失效
图像编码方法，图像解码方法，图像编码器，图像解码，程序，计算机数据信号，图像传输系统
- 专利标题： Image encoding method, image decoding method, image encoder, image decode, program, computer data signal, and image transmission system
- 专利标题（中）： 图像编码方法，图像解码方法，图像编码器，图像解码，程序，计算机数据信号，图像传输系统
-
申请号： US10476145申请日： 2002-11-18
-
公开(公告)号： US07336711B2公开(公告)日： 2008-02-26
- 发明人: Mitsuru Kobayashi , Shunichi Sekiguchi , Satoru Adachi
- 申请人： Mitsuru Kobayashi , Shunichi Sekiguchi , Satoru Adachi
- 申请人地址： JP Tokyo
- 专利权人： NTT DoCoMo, Inc.
- 当前专利权人： NTT DoCoMo, Inc.
- 当前专利权人地址： JP Tokyo
- 代理机构： Oblon, Spivak, McClelland, Maier & Neustadt, P.C.
- 优先权： JP2001-352379 20011116
- 国际申请： PCT/JP02/12013 WO 20021118
- 国际公布： WO03/043347 WO 20030522
- 主分类号： H04N7/18
- IPC分类号： H04N7/18
摘要：
A motion of an image in a block is detected with respect to image data D1, a coding mode to be applied thereto is selected among a plurality of prepared coding modes, and motion compensation is performed for the image data (Step S101). Then, an orthogonal transform coefficient D6 and coding mode information D3 undergo variable-length coding to generate coded data D7 (Step S103). Subsequently, in the variable-length coding of the coding mode information, a probability table for use in arithmetic coding is switched for each of binarization codes included in a binarization pattern of the coding mode information with reference to a coding mode selected in a block adjacent to the block. Thus, the image coding method, image decoding method, image coding apparatus, image decoding apparatus, program, computer data signal, and image transmission system, which are capable of enhancing efficiency of data compression for coding mode information multiplexed on coded data, are realized.