[vorbis-dev] video codec

Glenn F. Maynard glennm at mediaone.net
Thu Feb 15 18:42:05 PST 2001



On Sun, Feb 11, 2001 at 11:08:29AM +0800, Steve Underwood wrote:
 
> Are you saying that DVD does subtitling by lossless graphics, rather
> than, say, Unicode? I wondered why the font changes so often. I guess it
> makes sense, as it keeps the handling of thing like Devanagiri as easy
> as Romance text. Highly flexible for karaoke too (much bigger market
> than anything remotely educational).

DVD subtitles are simple paletted bitmaps, with a trivial RLE compression.
Works alright for subtitles (one every couple seconds, and sent only once
per subtitle, not once per frame), but not much else.


-- 
Glenn Maynard

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