首页> 外国专利> Digital video receiver, ECM extract equipment, EMM extract equipment, scramble key extract equipment, CCI extract equipment, digital video receiving system, ECM extract method, EMM extract method, scramble key extract method, CCI extract method, digital video receiving method, and recording medium

Digital video receiver, ECM extract equipment, EMM extract equipment, scramble key extract equipment, CCI extract equipment, digital video receiving system, ECM extract method, EMM extract method, scramble key extract method, CCI extract method, digital video receiving method, and recording medium

机译：数字视频接收机，ECM提取设备，EMM提取设备，加扰密钥提取设备，CCI提取设备，数字视频接收系统，ECM提取方法，EMM提取方法，加扰密钥提取方法，CCI提取方法，数字视频接收方法和记录中

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摘要

A decryption process chip has a memory in which a first decryption control unit for decrypting a scramble key by using an ECM and an EMM is downloaded from outside and stored. A stream input unit extracts a packet including the ECM based on first information obtained from the first decryption control unit, and the first decryption control unit extracts the ECM from the packet. An STB control unit extracts only data including the EMM based on second information set up from the first decryption control unit, and the first decryption control unit extracts the EMM from the data. The stream input unit indirectly obtains a scramble key decrypted by the first decryption control unit so as to extract the scramble key and transmit it to a descrambler.

机译：解密处理芯片具有存储器，其中用于从外部下载并存储用于通过使用ECM和EMM来解密加扰密钥的第一解密控制单元。流输入单元基于从第一解密控制单元获得的第一信息来提取包括ECM的分组，并且第一解密控制单元从分组中提取ECM。 STB控制单元基于从第一解密控制单元设置的第二信息仅提取包括EMM的数据，并且第一解密控制单元从该数据提取EMM。流输入单元间接获得由第一解密控制单元解密的加密密钥，以提取该加密密钥并将其发送给解扰器。

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公开/公告号US8243927B2

专利类型
公开/公告日2012-08-14

原文格式PDF
申请/专利权人 TAKASHI TANIGUCHI;
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申请/专利号US20070873493
发明设计人 TAKASHI TANIGUCHI;
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申请日2007-10-17
分类号H04N7/167;H04L29/06;H04L9/32;
国家 US
入库时间 2022-08-21 17:30:40

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