File format for multiple track digital data
US7519274B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 8, 2003 |
| Grant date | Apr 14, 2009 |
| Priority date | — |
| Expiry date | Mar 11, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B20/00739
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A file for storing digital data with high compression rate stores digital data for video and audio signals in multiple streams interleaved with each other. Each track has a stream descriptor list and a stream data list. The stream descriptor list includes a stream header chunk, a stream format chunk, and a stream name chunk. For a video stream, the stream descriptor list also includes a stream header data chunk if the video stream is under digital rights management (DRM) protection. The file format is compatible with high level data compressing algorithms, such as MPEG-4, which provide data compression ratio about six to ten times higher than a standard DVD format.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.