> What is the purpose of this high-pass filtering ?
> You said that it would affect only 2 MDCT coeficients, that is
> less than a percent of them all, so what gain do you/we expect from it ?
In the tuning of the 44.1kHz voice option (I know that this option should be
updated now for other bitrates), I added such an high pass filter by zeroing
the 2 lower mdct coefficients. In my test cases, it dropped the vbr average
bitrate from 121kbps to 120kbps. So it's just a little more than a percent.
It's right that it's not a lot, but I think it's important. As an example, a
standard 10 or 15Hz high pass filter would be nice, as no one is able to ear
such frequencies, so why encoding them?
Regards,
Gabriel Bouvigne - France
[EMAIL PROTECTED]
icq: 12138873
MP3' Tech: www.mp3tech.org
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