Naoki Shibata schrieb am Sam, 30 Sep 2000:
Youri Would it be possible to use some other switch, like --cwlimit, to achieve
Youri good quality with --nspsytune on all tonalities? If so, what settings would
Youri have to be used for it? (i.e. how should I interpret --cwlimit?)
It is a
Yog Sothoth schrieb am Fre, 29 Sep 2000:
hi -- This is my first post to the list. I've been
helping myself to the cvs source code for a few months now and this is a
subject I have done some experimentation with.
the only drawback I've found when using --nspsytune in vbr mode is that
I have already figured out why current --nspsytune spend too much
bits for tonal parts. I told all of my new ideas to Takehiro, and
Takehiro is now working to implement some of them. I also want to do
that myself, but I'm now very busy.
I have not changed JS related algorithms, so currently
Hi Roel!
In order to get the (much) higher --nspsytune filesizes down, I used
"--athlower -21" (or -20--23) to compensate. [seems to go negative
:)]
I'm sorry to say, but in my opinion it is a really bad idea to lower the file
size with that --athlower switch, you are tweaking at the wrong
Hi Mark,
Mark Right now, the spreading function
Mark is normalized so that (for example) convolving s3 with a constant
Mark function will not remove any energy and return the same constant.
Is there any reason why energy should be preserved here?
Mark After the spreading function is
Hi Mark,
Mark Right now, the spreading function
Mark is normalized so that (for example) convolving s3 with a constant
Mark function will not remove any energy and return the same constant.
Is there any reason why energy should be preserved here?
just a convention. s3[][] is
Mark Taylor schrieb am Mon, 10 Jul 2000:
Why I attenuate 3dB (0.7 != -1.5dB) here is that there is a description
in Zwicker's book that peak of masking is 3dB below masker. Why I
increase masking by 2dB later is that I tuned this value by listening
tests.
I dont know if this is
There is a relation between sound pressure level and sound intensity level
if there is a plain wave (in german "ebene Schallwelle")
L = 20*lg(p/p0) dB = 10*lg(I/I0) dB
p0 := 2E-5 Pa
I0 := 1E-12 W/m^2
1W = 1 Nm/s
for coherent sounds one uses the sound pressure
(coherent sounds:
From: "Naoki Shibata" [EMAIL PROTECTED]
--nspsytune command line option turns on following things
1. Addition of simultaneous masking.
What does this one mean?
2. MAXNOISE is selected if max/avg exceeds predefined threshold.
3. long block fft window function is changed to blackmann
Mathew 1. Addition of simultaneous masking.
Mathew
Mathew What does this one mean?
If there are two or more maskers, produced masking threshold is not
just an addition of them, but more than that in most case. I coded this.
This page explains same thing, but the formula I used is not
Hi,
I have just commited changes to add --nspsytune option.
With this option, vbrtest.wav is encoded perfectly, and
encoded sound becomes more natural to my ear though encoded file size
increases.
--nspsytune command line option turns on following things
1. Addition of
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