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| Sub-picture data recorded on a disc
is compressed by a run-length method, which is different from main-picture data
compressed by a MPEG method. |
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Compression rules of main-picture data and subpicture data are different. |
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Run-length compression for sub-picture data is suited for processing character
information like superimposed captions. |
[References] |
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DVD Specifications for Read-Only Disc: Part III,Index.5.4.3.2 |
[Offering Patent] |
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USP5,721,720 |
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Copyright(C) 2002-2005 DVD 6C LICENSING AGENCY All Rights Reserved.
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