Memory efficient method and apparatus for reading and caching of DVD data
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United States of America Patent
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Apr 30, 2002
Grant Date -
N/A
app pub date -
Jan 28, 1999
filing date -
Jan 28, 1999
priority date (Note) -
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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.
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