发明申请
US20050013438A1 Method for ciphering a compressed audio or video stream preserving the coding syntax
审中-公开
用于加密保留编码语法的压缩音频或视频流的方法
- 专利标题： Method for ciphering a compressed audio or video stream preserving the coding syntax
- 专利标题（中）： 用于加密保留编码语法的压缩音频或视频流的方法
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申请号： US10892889申请日： 2004-07-15
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公开(公告)号： US20050013438A1公开(公告)日： 2005-01-20
- 发明人: Jean Nicolai
- 申请人： Jean Nicolai
- 申请人地址： FR Montrouge 92120
- 专利权人： STMicroelectronics S.A.
- 当前专利权人： STMicroelectronics S.A.
- 当前专利权人地址： FR Montrouge 92120
- 优先权： FR03/08642 20030716
- 主分类号： H04N7/167
- IPC分类号： H04N7/167 ; H04L9/00
摘要：
A method ciphers a standardized stream of data coded by a table of codewords of different lengths, wherein at least one part of the bits is ciphered which are such that, after randomly changing their value(s) and after replacing bit by bit in the codeword to be ciphered the non-ciphered bits with the ciphered bits, a codeword of the table of codewords is obtained.
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