Invention Grant
US08243927B2 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
有权
数字视频接收机，ECM提取设备，EMM提取设备，加密密钥提取设备，CCI提取设备，数字视频接收系统，ECM提取方法，EMM提取方法，加密密钥提取方法，CCI提取方法，数字视频接收方法和记录 中
- Patent Title: 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
- Patent Title (中): 数字视频接收机，ECM提取设备，EMM提取设备，加密密钥提取设备，CCI提取设备，数字视频接收系统，ECM提取方法，EMM提取方法，加密密钥提取方法，CCI提取方法，数字视频接收方法和记录 中
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Application No.: US11873493Application Date: 2007-10-17
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Publication No.: US08243927B2Publication Date: 2012-08-14
- Inventor: Takashi Taniguchi
- Applicant: Takashi Taniguchi
- Applicant Address: JP Osaka
- Assignee: Panasonic Corporation
- Current Assignee: Panasonic Corporation
- Current Assignee Address: JP Osaka
- Agency: RatnerPrestia
- Main IPC: H04N7/167
- IPC: H04N7/167 ; H04L29/06 ; H04L9/32
Abstract:
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.
Public/Granted literature
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