| US 7,602,912 B2 | ||
| Content selection for partial encryption | ||
| Brant L. Candelore, Escondido, Calif. (US); Robert Allan Unger, El Cajon, Calif. (US); and Leo M. Pedlow, Jr., Ramona, Calif. (US) | ||
| Assigned to Sony Corporation, Tokyo (Japan); and Sony Electronics Inc., Park Ridge, N.J. (US) | ||
| Filed on Sep. 25, 2007, as Appl. No. 11/903,809. | ||
| Application 11/282139 is a division of application No. 10/037499, filed on Jan. 02, 2002, granted, now 7,151,831. | ||
| Application 11/903809 is a continuation of application No. 11/282139, filed on Nov. 18, 2005, granted, now 7,319,753. | ||
| Claims priority of provisional application 60/296673, filed on Jun. 06, 2001. | ||
| Claims priority of provisional application 60/304241, filed on Jul. 10, 2001. | ||
| Claims priority of provisional application 60/304131, filed on Jul. 10, 2001. | ||
| Claims priority of provisional application 60/343710, filed on Oct. 26, 2001. | ||
| Prior Publication US 2008/0085000 A1, Apr. 10, 2008 | ||
| This patent is subject to a terminal disclaimer. | ||
| Int. Cl. H04N 7/167 (2006.01) | ||
| U.S. Cl. 380—200 [380/201; 380/202] | 20 Claims |
| 1. A method of selecting data for multiple carriage partial encryption, comprising:
examining unencrypted packets of data in a digital audio/video data stream to identify a packet type;
selecting packets of the identified packet type for multiple partial encryption, wherein the amount of data to be encrypted
is sufficient to render a portion of an entire frame unviewable; and
sending the selected packets to a plurality of encryption devices for encryption under a corresponding plurality of encryption
methods.
|