Memory efficient method and apparatus for reading and caching of DVD data
US6381404B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 28, 1999 |
| Grant date | Apr 30, 2002 |
| Priority date | — |
| Expiry date | Jan 28, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2220/2562
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A multi-block, read-ahead technique permits a DVD player to read and cache DVD data from a DVD source in response to navigation packs (NAV-PCKs) of individual VOBUs to avoid crossing title boundaries, Each VOBU has a NAV-PCK, which specifies the number of blocks in that VOBU. This information can guide the DVD player in performing read-ahead operations aligned to VOBUs, i.e., reading and caching data blocks separately for individual VOBUs. The invention takes advantage of the fact that data blocks within individual VOBUs do not cross title boundaries, and so read-ahead operations aligned to VOBUs avoid reading blocks that cross title boundaries.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.