System, method, and computer program product for buffering in association with audio/video digital rights management (DRM) processing
US8402280B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 15, 2009 |
| Grant date | Mar 19, 2013 |
| Priority date | — |
| Expiry date | Oct 21, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N21/8455
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A system, method, and computer program product are provided for buffering an audio video (AV) stream, audio/video header information, and an audio/video elementary stream for hardware audio/video digital rights management (DRM) processing. In operation, an AV stream encrypted under a shared symmetric key in an M2TS format is buffered, where the AV stream includes content including at least one of audio or video and all content data associated with the AV stream is removed at picture level and below, with the exception of content headers associated with the content data. Additionally, content header information encrypted under the shared symmetric key is buffered, the content header information indicating locations of the content headers associated with the content data. Further, a content elementary stream encrypted under a hardware secret key is buffered for consumption of a hardware bit stream decoding engine.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.