Re: MP3 Vs ATRAC : Which is worse ?

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Article #1021

#1021

From: Greg Hersh
Date: Tue, 12 Jan 1999 00:00

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Frederic St-Gelais wrote:

> Well, as far as i know, mp4's are not around yet. It was
> supposed to be out in December (according to irc #mp3
> central) but it was delayed. As far as i'm concerned, as
> much
> as i like the mp3 format, MD still sounds WAY better,
> especially
> above 8khz. Mp4 are supposed to sound better than MP3,
> with an even greater compression ratio, but it'll take up
> more
> CPU power to decode (read). As always, correct me if i'm
> wrong,
> i have no ego... =o)
> 
> -=Fred=-

From what I undestand, there are two formats which kind of
superceed mp3: one is AAC (developed as audio part of MPEG-2),
another is VQF. What
is really confusing at this point that people refer to either AAC 
or VQF as mp4. I saw some encoders/players
being referred to as mp4, but it was really VQF. As I understand,
a 'true mp4' combines both AAC and VQF technologies, source code
is available but no encoders/players yet (?)

Either AAC and VQF encoders/players are available. They take
more CPU power to encode/play, compared with mp3. Seems like
having 200Mhz processor is desirable. A claim is that 128Kbps
aac/vqf/mp4 file sound as good as 220-256Kbps mp3 file. 

-- 
Greg

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From: Greg Hersh <ghersh@bbnplanet.com>
Subject: Re: MP3 Vs ATRAC : Which is worse ?
Date: 1999/01/12
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