[vorbis-dev] Stereo mode settings

[Sebastian Gesemann]

On Mon, 16 Feb 2004, Segher Boessenkool wrote:

> That picture looks _really_ strange.  I'll investigate some more...
> Could you make a picture with logarithmic frequency scale, too, please?
> Mail me privately if you think it clobbers the list...

Hmmm... I don't see why a log-scale x-axis would help you.

Anyway, I tinkered a bit around this quantization issue and I came
up to some serious math formuals able to determine the optimal
quantization thresholds for a given sample distribution. (optimal
in sense that the energy of the quantized signal is *very* close
to the original. And personal experiements showed that it does not
decrease the signal-to-noise ratio that much.

I've some ideas how one could implement this modified quantization
sheme but i've nearly no experience with the reference code nor
with the C language (I've no C compiler/linux)

Therefore, my suggestion would be: I present a detailed paper of
my thoughts (how I think we can solve this HF boost issue) and you
Segher (or any other skilled person) would help to put it in
practice.

How about that ?

<p>BTW: To give you a picture who I am, what I'm doing:
- computer science student
- experience in source coding (images, video, audio)
- have implemented a vorbis decoder in java
  (100% from scratch, even the MDCT/FFT, i didn't look at
  the reference code once)

<p>Ghis!
Sebastian


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