> From: "Mark Taylor" <[EMAIL PROTECTED]>
>
> Could someone re-post that email with the decoder quality comparisons?
>
> I lost it (and I cant remember who did the work), and it must have
> been posted during the month when the mp3encoder mailing list archive
> was down.
This one? (Two messages from about a month ago)
Very simplistic tests...
----- Original Message -----
> From: "Mathew Hendry" <[EMAIL PROTECTED]>
> To: <[EMAIL PROTECTED]>
> Sent: Friday, March 17, 2000 4:25 PM
> Subject: Re: [MP3 ENCODER] Best decoder?
>
> From: "Felix von Leitner" <[EMAIL PROTECTED]>
> > Excuse me, but what can you do incorrectly when decoding an mp3 stream?
>
> It seems there are plenty of things that can go wrong. :0
>
> I took a simple (stereo) mixture of sine waves (1kHz, 2kHz, 4kHz, 8kHz,
> 16kHz) and encoded them with mp3enc @ 320kbps, qual 9, 44100Hz. I decoded
> this signal with l3dec, winamp and sonique.
>
> First thing I noticed is that sonique's decoder *inverts* the signal,
which
> isn't very impressive.
>
> I then compared the decoded Mp3s to the original. Following are some
> statistics on the delay-adjusted difference signals - sonique does
> relatively badly. l3dec and winamp are almost identical. (RMS figures use
a
> 50ms window).
>
> L3Dec
> --------------------------------------
> Left Right
> Min Sample Value : -367 -363
> Max Sample Value : 366 366
> Peak Amplitude : -39.02 dB -39.04 dB
> Possibly Clipped : 0 0
> DC Offset : 0 0
> Minimum RMS Power: -47.10 dB -47.11 dB
> Maximum RMS Power: -40.05 dB -40.05 dB
> Average RMS Power: -45.47 dB -45.47 dB
> Total RMS Power : -45.22 dB -45.22 dB
>
> Winamp
> --------------------------------------
> Left Right
> Min Sample Value : -367 -364
> Max Sample Value : 366 369
> Peak Amplitude : -39.00 dB -38.96 dB
> Possibly Clipped : 0 0
> DC Offset : -.002 -.002
> Minimum RMS Power: -47.10 dB -47.11 dB
> Maximum RMS Power: -40.05 dB -40.05 dB
> Average RMS Power: -45.47 dB -45.47 dB
> Total RMS Power : -45.22 dB -45.22 dB
>
> Sonique (after compensating for inversion)
> ---------------------------------------
> Left Right
> Min Sample Value : -877 -877
> Max Sample Value : 819 820
> Peak Amplitude : -31.45 dB -31.45 dB
> Possibly Clipped : 0 0
> DC Offset : 0 0
> Minimum RMS Power: -42.09 dB -42.08 dB
> Maximum RMS Power: -37.66 dB -37.66 dB
> Average RMS Power: -39.92 dB -39.92 dB
> Total RMS Power : -39.84 dB -39.84 dB
>
> In FFT analysis, the sonique difference signal is generally noisier
overall,
> with the 2kHz noise peak being at least *12dB* higher than the
corresponding
> peak in the l3dec and winamp versions.
>
> -- Mat.
----- Original Message -----
> From: "Mathew Hendry" <[EMAIL PROTECTED]>
> To: "MP3 Encoder" <[EMAIL PROTECTED]>
> Sent: Friday, March 17, 2000 9:09 PM
> Subject: Fw: [MP3 ENCODER] Best decoder?
> Sending this again. Didn't seem to get through the first time. (It never
> arrived here, at least).
>
> ----- Original Message -----
> From: "Mathew Hendry" <[EMAIL PROTECTED]>
> To: <[EMAIL PROTECTED]>
> Sent: Friday, March 17, 2000 5:04 PM
> Subject: Re: [MP3 ENCODER] Best decoder?
>
>
> > > From: "Gabriel Bouvigne" <[EMAIL PROTECTED]>
> > >
> >
> > > Wich sonique? 1.5 or lower?
> >
> > Sorry, that was 1.30.4, the latest non-beta release. I finally persuaded
> 1.5
> > beta to work (it's very unstable) and its results are identical to those
> of
> > L3Dec:
> >
> > Sonique 1.5
> > --------------------------------------
> > Left Right
> > Min Sample Value : -367 -363
> > Max Sample Value : 366 366
> > Peak Amplitude : -39.02 dB -39.04 dB
> > Possibly Clipped : 0 0
> > DC Offset : 0 0
> > Minimum RMS Power: -47.10 dB -47.11 dB
> > Maximum RMS Power: -40.05 dB -40.05 dB
> > Average RMS Power: -45.47 dB -45.47 dB
> > Total RMS Power : -45.22 dB -45.22 dB
> >
> > When directly comparing the L3Dec and Sonique 1.5 outputs, the maximum
> > difference between the two was +/- 1 LSB, which I guess can be
attributed
> to
> > differences in dithering.
> >
> > I was surprised at the poor results from the old Sonique, though, since
it
> > seems to have acquired a reputation as the best quality player (even
> before
> > these latest betas).
> >
> > -- Mat.
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