Cryptography – Communication system using cryptography – Time segment interchange
Reexamination Certificate
2005-08-02
2005-08-02
Peeso, Thomas R. (Department: 2132)
Cryptography
Communication system using cryptography
Time segment interchange
C713S152000, C713S152000
Reexamination Certificate
active
06925180
ABSTRACT:
A PC card video recorder. The conditional access functionality of a Point Of Deployment module (POD) is augmented by providing solid state memory on a PC card for recording and playback of programming. An encrypted video stream from a television Set-Top Box (STB)or other appliance is decrypted in the PC card. The decrypted video stream is then filtered to remove information not relevant to a program to be stored. The filtered video stream is then applied to the solid state memory. During playback, the video stream is retrieved from the memory and encrypted prior to transmission to the STB. Intra-pictures can be played back rapidly to provide a fast forward mode by reference to a table or packet header storing starting and ending address of the intra-pictures. Multiple POD card interfaces can be provided in the STB to accept multiple PC card recorders. Pairing security can be provided by checking a recording STB identifier against a playback STB identifier.
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OpenCable™ Architecture, Michael Adams, Cisco Press, 2000, pp. 380-400.
1- SCTE-DVS064 Part B, DVS-131.
2- PC Card Standard 7.4.
3- PCMCIA System Architecture, Don Anderson, Addison-Wesley Pub., ISBN 0201409917.
4- OpenCable HOST-POD Interface Specification.
5- OpenCable POD Copy Protection System.
6- Applied Cryptography, Burce Schneier, John Wiley and Sons, ISBN 0-471-11709-9.
7- ISO-IEC 13818 International Standard for the Transport of Compressed Digital Media (MPEG).
Miller Jerry A.
Miller Patent Services
Peeso Thomas R.
Sony Corporation
Sony Electronics Inc.
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