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Topic: Something wrong with ISO Psy model II\'s bark-scale tables? (Read 2077 times) previous topic - next topic

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  • wkw
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Something wrong with ISO Psy model II\'s bark-scale tables?
Hi,

I notice in the MPEG4 ISO specs that the psychoacoustic model's bark-scale table for
44100 kHz long block is giving me poor audio quality especially for the lower frequencies. I wonder if the values are not accurate?

wkw

  • Ivan Dimkovic
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Something wrong with ISO Psy model II\'s bark-scale tables?
Reply #1
No !

Don't use bark tables from ISO docs!!! In fact, don't use ANY tables for psychoacostics!!! There are lot of good approximation formulaes, and you can compute your own values.

Also, the ATH (QTHR) is a complete mess, and it is normalized to some level unknown to me!  You also need to calculate that properly!

Take a look at LAME or FAAC code.