Posted by fred-bloggs on 03/08/06 12:46

Man-wai Chang <toylet.toylet@gmail.com> wrote in
news:440ea7a7$1_2@rain.i-cable.com:

>
> What're the advantages of MP4 against MP3? And it seems that MP4 is a
> M$ standard, not intended for free+public use.
>

<quote>
MPEG2 AAC offers superior results (to mp3) at stereo bit rates below 128
kb/s. <endquote>
http://www.vialicensing.com/products/mpeg2aac/standard.html

MPEG4 AAC extends performance below 32 kb/s.
http://www.vialicensing.com/products/mpeg4aac/standard.html

Patents for AAC are held by AT&T, Dolby, Fraunhofer IIS, and Sony.

Microsoft's proprietary encoder is called Windows Media (.wma,.wmv...)

--
fred

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