Video slice and active region based multiple partial encryption
A television set-top box has a receiver receiving a digital television signal comprising: a plurality of unencrypted packets and a plurality of encrypted packets, where the encrypted packets carry data describing an active region of a video frame. A decrypter decrypts the encrypted packets. A decoder decrypted packets to produce a signal suitable for play on a television set. This abstract is not to be considered limiting since other embodiments can include more, fewer or different features than those described in this abstract.
1. A television set-top box, comprising:
a receiver configured to receive a digital television signal comprising:
a plurality of unencrypted video packets; and
a plurality of encrypted video packets, where the encrypted video packets comprise less than 100% of the packets carrying video data in a video frame, and where the encrypted video packets contain data describing an active region of the video frame, where the active region comprises between approximately ⅓ to ¾ of the overall area of the video frame;
a decrypter that is configured to decrypt the encrypted video packets; and
a decoder that is configured to decode the unencrypted video packets and the decrypted video packets to produce a signal suitable for display play on a television display.
2. The television set-top box according to claim 1 , where the active region comprises a central portion of the video frame.
3. The television set-top box according to claim 1 , where the active region comprises an upper central portion of the video frame.
4. The television set-top box according to claim 1 , where the active region is centered at approximately a center of the frame horizontally and approximately the tenth to fifteenth slice.
5. The television set-top box according to claim 1 , where the unencrypted packets and the encrypted packets are identified by different packet identifiers (PID).
6. The television set-top box according to claim 1 , where the unencrypted packets and the encrypted packets are identified by the same packet identifier (PID).
7. The television set-top box according to claim 3 , where the unencrypted packets and the encrypted packets are identified by the same packet identifier (PID).
8. A television receiver device, comprising:
a receiver configured to receive a digital television signal comprising:
a plurality of unencrypted video packets; and
a plurality of encrypted video packets, where the encrypted video packets comprise less than 100% of the packets carrying video data in a video frame, and where the encrypted video packets contain data describing an active region of the video frame, where the active region comprises between approximately ⅓ to ¾ of the overall area of the video frame;
a decrypter that is configured to decrypt the encrypted video packets; and
a decoder that is configured to decode the unencrypted video packets and the decrypted video packets to produce a signal suitable for display play on a television display.
9. The television receiver device according to claim 8 , where the active region comprises a central portion of the video frame.
10. The television receiver device according to claim 8 , where the active region comprises an upper central portion of the video frame.
11. The television receiver device according to claim 8 , where the active region is centered at approximately a center of the frame horizontally and approximately the tenth to fifteenth slice.
12. The television receiver device according to claim 8 , where the unencrypted packets and the encrypted packets are identified by different packet identifiers (PID).
13. The television receiver device according to claim 8 , where the unencrypted packets and the encrypted packets are identified by the same packet identifier (PID).
14. The television receiver device according to claim 10 , where the unencrypted packets and the encrypted packets are identified by different packet identifiers (PID).
15. The television receiver device according to claim 10 , where the unencrypted packets and the encrypted packets are identified by the same packet identifier (PID).
16. A television set-top box, comprising:
a receiver configured to receive a digital television signal comprising:
a plurality of unencrypted video packets; and
a plurality of encrypted video packets, where the encrypted video packets comprise less than 100% of the packets carrying video data in a video frame, and where the encrypted video packets contain data describing an active region of the video frame;
where the active region comprises an upper central portion of the video frame that occupies between approximately ⅓ and ¾ of the overall area of the video frame;
a decrypter configured to decrypt the encrypted video packets;
a decoder configured to decode the unencrypted video packets and the decrypted video packets to produce a signal suitable for display play on a television display; and
where the unencrypted packets and the encrypted packets are identified by packet identifiers (PID).
17. The television set-top box according to claim 16 , where the unencrypted packets and the encrypted packets are identified by different packet identifiers (PID).
18. A television set-top box, comprising:
a receiver configured to receive a digital television signal comprising:
a plurality of unencrypted video packets; and
a plurality of encrypted video packets, where the encrypted video packets comprise less than 100% of the packets carrying video data in a video frame, and where the encrypted video packets contain data describing an active region of the video frame, where the active region is centered at approximately a center of the frame horizontally and approximately the tenth to fifteenth slice;
a decrypter configured to decrypt the encrypted video packets; and
a decoder configured to decode the unencrypted video packets and the decrypted video packets to produce a signal suitable for display play on a television display.
19. The television set-top box according to claim 18 , where the active region comprises a central portion of the video frame.
20. The television set-top box according to claim 18 , where the active region comprises an upper central portion of the video frame.
21. The television set-top box according to claim 18 , where the unencrypted packets and the encrypted packets are identified by different packet identifiers (PID).
22. The television set-top box according to claim 18 , where the unencrypted packets and the encrypted packets are identified by the same packet identifier (PID).
23. A television receiver device, comprising:
a receiver configured to receive a digital television signal comprising:
a plurality of unencrypted video packets; and
a plurality of encrypted video packets, where the encrypted video packets comprise less than 100% of the packets carrying video data in a video frame, and where the encrypted video packets contain data describing an active region of the video frame, where the active region is centered at approximately a center of the frame horizontally and approximately the tenth to fifteenth slice;
a decrypter configured to decrypt the encrypted video packets; and
a decoder configured to decode the unencrypted video packets and the decrypted video packets to produce a signal suitable for display play on a television display.
24. The television receiver device according to claim 23 , where the active region comprises a central portion of the video frame.
25. The television receiver device according to claim 23 , where the active region comprises an upper central portion of the video frame.
26. The television receiver device according to claim 23 , where the unencrypted packets and the encrypted packets are identified by different packet identifiers (PID).
27. The television receiver device according to claim 23 , where the unencrypted packets and the encrypted packets are identified by the same packet identifier (PID).