VIDEO PROCESSING SYSTEM WITH KEY TABLE AND METHODS FOR USE THEREWITH

• US 20090293082A1
• Filed: 08/12/2008
• Published: 11/26/2009
• Est. Priority Date: 05/20/2008
• Status: Abandoned Application

• Current Assignee: Avago Technologies General IP PTE Limited (Broadcom, Inc.)
• Original Assignee: Broadcom Corporation (Broadcom, Inc.)
• Inventors: Rosmann, David, Chen, Sherman (Xuemin), Karaoguz, Jeyhan, Quigley, Thomas J., Dove, Michael, Gordon, Stephen E.
• Application Number:
  US12/190,076
• Publication Number:
  US 20090293082A1
• Time in Patent Office: Days
• US Class Current: 725/25
• CPC Class Codes: H04N 21/26606 for generating or managing entitlement messages, e.g. Entitlement Control Message [ECM] or Entitlement Management Message [EMM] arrangements for conditional access to broadcast information or to broadcast-related services H04H60/14
• CPC Class Codes: H04N 21/41407 embedded in a portable device, e.g. video client on a mobile phone, PDA, laptop constructional details of equipment or arrangements specially adapted for portable computer application G06F1/1626; arrangements specially adapted for mobile receivers in broadcast systems H04H20/57
• CPC Class Codes: H04N 21/4623 Processing of entitlement messages, e.g. ECM [Entitlement Control Message] or EMM [Entitlement Management Message] arrangements for conditional access to broadcast information or to broadcast-related services H04H60/14
• CPC Class Codes: H04N 21/6581 Reference data, e.g. a movie identifier for ordering a movie or a product identifier in a home shopping application
• CPC Class Codes: H04N 7/162 Authorising the user terminal, e.g. by paying; Registering the use of a subscription channel, e.g. billing
• CPC Class Codes: H04N 7/17318 Direct or substantially direct transmission and handling of requests

Abstract

A video processing system includes a video decoder that decodes a first video signal based on at least one first conditional access code. A video control module maintains a key table that includes the at the at least one first conditional access code and at least one second conditional access code for use in conjunction with a second video signal.

Claims

1. A video processing system comprising:

a video decoder that decodes a first video signal based on at least one first conditional access code; and

a video control module, coupled to the video decoder, that maintains a key table that includes the at the at least one first conditional access code and at least one second conditional access code for use in conjunction with a second video signal.

2. The video processing system of claim 1 wherein the first video signal corresponds to a first broadcast channel and the second video signal corresponds to a second broadcast channel.

3. The video processing system of claim 2 wherein the video control module, in response to a channel change command of the user to the second broadcast channel, retrieves the at least one second conditional access code from the key table, and sends the at least one second conditional access code to the video decoder, and wherein the video decoder decodes the second video signal based on the at least one second conditional access code.

4. The video processing system of claim 1 wherein the key table includes a plurality of conditional access codes corresponding to a plurality of broadcast channels.

5. The video processing system of claim 4 wherein the plurality of broadcast channels include at least one of, a frequently selected channel, a user-designated channel, a last-viewed channel, and a predetermined channel.

6. The video processing system of claim 1 wherein the at least one first conditional access code includes a first encryption key for descrambling the first video signal and the at least one second conditional access code includes a second encryption key for descrambling the second video signal.

7. The video processing system of claim 1 wherein the video control module automatically updates the key table based on at least one entitlement control message.

8. The video processing system of claim 1 further comprising a transceiver module, coupled to the video decoder and the video control module, that contemporaneously receives the first video signal and the at least one second conditional access code.

9. The video processing system of claim 1 wherein the video control module updates the key table based on at least one of, the qualification of a broadcast channel as a frequently selected channel, the qualification of a broadcast channel as a last-viewed channel, and a user selection of a broadcast channel for inclusion in the key table.

10. The video processing system of claim 1 wherein the video decoder descrambles the first video signal based on the at least one first conditional access code at least one first conditional access code and decompresses the first video signal base on a video compression format.

11. A method comprising:

decoding a first video signal based on at least one first conditional access code; and

maintaining a key table that includes the at the at least one first conditional access code and at least one second conditional access code for use in conjunction with a second video signal.

12. The method of claim 11 wherein the first video signal corresponds to a first broadcast channel and the second video signal corresponds to a second broadcast channel.

13. The method of claim 12 further comprising:

in response to a channel change command to change to the second broadcast channel;

retrieving the at least one second conditional access code from the key table; and

decoding the second video signal based on the at least one second conditional access code.

14. The method of claim 11 wherein the key table includes a plurality of conditional access codes corresponding to a plurality of broadcast channels.

15. The method of claim 14 wherein the plurality of broadcast channels include at least one of, a frequently selected channel, a user-designated channel, a last-viewed channel, and a predetermined channel.

16. The method of claim 11 wherein the at least one first conditional access code includes a first encryption key for descrambling the first video signal and the at least one second conditional access code includes a second encryption key for descrambling the second video signal.

17. The method of claim 11 maintaining the key table includes automatically updating the key table based on at least one entitlement control message.

18. The method of claim 11 further comprising:

contemporaneously receiving the first video signal and the at least one second conditional access code.

19. The method of claim 11 wherein maintaining the key table includes updating the key table based on at least one of, the qualification of a broadcast channel as a frequently selected channel, the qualification of a broadcast channel as a last-viewed channel, and a user selection of a broadcast channel for inclusion in the key table.

20. The method of claim 11 wherein decoding the first video signal includes descrambling the first video signal based on the at least one first conditional access code at least one first conditional access code and decompressing the first video signal based on a video compression format.