Video H.264 encryption preserving synchronization and compatibility of syntax
US8160157B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 21, 2005 |
| Grant date | Apr 17, 2012 |
| Priority date | — |
| Expiry date | Aug 4, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N21/8451
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method for encrypting data exchanged between an encoder and a decoder in a video system is disclosed. A set of bits which, when encoded, do not have any influence upon the decoding stage, are determined during the encoding stage. At least one part or all of the bits selected in stage 1 is/are encoded prior to transmission to the decoding stage. The bit selection stage determines the parts of the flow of bits that only modify the contexts of the decoding process in an insignificant manner in the sense that the modification due to encryption does cause desynchronization or does not lead to non-compatible bit flows with regard to encoding contexts and visual impact. The present invention is used with H.264 encoders/decoders.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.