Protecting video as it is decoded by a codec
US8457311B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 27, 2010 |
| Grant date | Jun 4, 2013 |
| Priority date | — |
| Expiry date | Jul 27, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N21/4627
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In one aspect, a method includes: obtaining compressed video content within a video content processing module, a portion of a document structure of the compressed video content conforming to a predefined codec, the portion of the document structure including a plurality of video frames; decrypting the compressed video content in accordance with a digital rights management data encryption applied to the compressed video content; adding information in an extension frame associated with a portion of the document structure; and applying an encoding technique to content of one or more of the plurality of video frames after the decrypting, wherein the extension frame flags the applied encoding technique; and providing the compressed video content, including the encoded content, to a media player including a codec conforming to the predefined codec.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.