Well,
I don't know MP3, but one thing is sure:
When you encode you loose information and no decoder will be able to 'retrieve'
this information!!!
So the encoding algorithm is the most important. The decoder can't differ much
for the decoding part. However the output of the decoder may well have a digital
low-pass filter in order to remove decoding attributes. There are many algorithm
for digital low-pass filters. And if your filter has more taps (ie, it looks
further backwards, thus taking more time), it is normaly of higher quality.
Cheers,
Ralph
[EMAIL PROTECTED] wrote:
>
> All,
>
> >ATRAC playback and MP3 playback (decoders) are well defined- once you have
> >a data stream encoded, it will produce the same digital data on playback,
> >unless you have been screwing with your equalizer. Any differences to the
> >sound are not because of different ATRAC (or MP3) decoders.
> So are you saying that it doesn't matter about the decoder?? Okay
> then.... Attach your PC up to your hifi (+ a good set of speakers
> (although it should be a sin to use MP3 on them ;)).
>
> 1st play a MP3 in WinAmp (using the Niterain (spl) decoder) and then
> use either the new MS Media Player or say (on linux) kmp3.
>
> Soz to say there is a detectable difference, I find the Winamp sounds
> more muffled, less clearly defined. Let's make this clear... with no
> EQ settings, no plug ins, volume in both players 100% and system set
> to 50%, taking the line out of the same sound card.
>
> >This is not the case for encoders. Every song can potentially produce an
> >infinite number of encoded variations. It's the encoder which must pick the
> >best match it can given the available bitrate. Early ATRACs did a poorer
> >job at this. Early MP3 encoders, and those written by back-yard boys are
> >also in the same boat. Ideally, if you are not working to a time limit, you
> >can usually do a much better job than if you were. But technology is
> >improving all the time, and these days "smart" real-time encoders work well
> >enough.
> Agreed, encoders can produce a range of results, but I'm saying that
> decoders can to. Although it shouldn't be this way.
>
> Just trying to decide what this has to do with MD's? Oh yeah ATRAC was
> mentioned, I also remember hearing that some units sounded better then
> others on play back, but I have no proof for that. But I do for the
> MP3 ;). Why do you think we use kJukeBox for our FM modulator (why
> can't we just call it an FM transmitter? ;)
>
> P.
> --
> "Just what ever you do, don't let go of..." *SPLASH* "...the oars..." -- Rowing
>Instructor.
> Peter Wood. ([EMAIL PROTECTED]) - ICQ? UIN - 15779342
> IRC? Doc_Z on @#3cr and #ircbar using irc.dal.net:7000 (DALnet IRC Network)
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Ralph Smeets Functional Verification Centre Of Competence - CMG
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