AAC | ADPCM | Convolution | DAFx | FFT | IIR | Mixer | MP3 | MPEG | MPEG-4

I m working on an assignment where in I have to split an audio channel into multiple sub
bands using QMF filters. I wanted to know how can I compare the quality of the input audio and
the reconstructed audio. Is there any method to do the same using frequency transform, If yes
how? Thanks in advance.

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If you are using a perfect reconstruction filterbank , then you can go with=
 SNR measurements to determine the quality. If you are using pseudo QMF(lik=
e the once in MP3) you can use a tool like EAQUAL, or similar methods,=C2 t=
o get a signal to mask (or noise to mask) measurement.
Regards,
Amit

----- Original Message ----
From: "v...@gmail.com" <v...@gmail.com>
To: a...@yahoogroups.com
Sent: Saturday, 14 June, 2008 10:43:41 AM
Subject: [audiodsp] Audio Quality Measurement or Comparison
I m working on an assignment where in I have to split an audio channel into=
 multiple sub bands using QMF filters. I wanted to know how can I compare t=
he quality of the input audio and the reconstructed audio. Is there any met=
hod to do the same using frequency transform, If yes how? Thanks in advance=
.
=20
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