发明名称 |
VERFAHREN ZUR VERSCHLÜSSELUNG EINES FEHLERTOLERANZ-KOMPRIMIERTEN AUDIO- ODER VIDEOSTROMS |
摘要 |
The method involves encrypting a part of packet bits of audio or video data that are defined by two consecutive timing marks, by random pseudo flow. The compressed data are partly coded by tables of reversible variable length coded words and non reversible variable length coded words. The data are encrypted by a symmetric encryption algorithm by the tables. - Independent claims are also included for the following: - (a) compressed encrypted data flow - (b) audio/video data coder/decoder - (c) a computer readable medium having program codes for implementing a method of encrypting a flow of compressed audio or video data. |
申请公布号 |
DE602004003067(D1) |
申请公布日期 |
2006.12.14 |
申请号 |
DE20046003067T |
申请日期 |
2004.07.08 |
申请人 |
STMICROELECTRONICS S.A. |
发明人 |
NICOLAI, JEAN;ORLANDO, WILLIAM |
分类号 |
H04L9/18;H04N7/167 |
主分类号 |
H04L9/18 |
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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