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GT3b2 with HF Reduction, Discussion
SebastianG
post Mar 23 2004, 16:40
Post #1





Group: Developer
Posts: 1318
Joined: 20-March 04
From: Göttingen (DE)
Member No.: 12875



Split from here.

Please tell me some details about your HF boost reduction strategy.

Maybe my posting at
Ogg Vorbis - General
is of some interest.

edited: had some troubles posting the link ;)

bye,
Sebastian

This post has been edited by dev0: Mar 26 2004, 15:06
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SebastianG
post Mar 25 2004, 20:36
Post #2





Group: Developer
Posts: 1318
Joined: 20-March 04
From: Göttingen (DE)
Member No.: 12875



I don't feel guilty, too. I just said "IF this is the only thing he's changed, ...".
wink.gif

I completely understand your point, tigre and QK. This is my point: Do I have to rely on ABX tests when an unwanted effect is objectivly measurable ? Maybe we're still addressing different problems. I'm interested in preserving the energy level which I think is related to the increase of intensity of the mentioned transients.

There are 3 causes for this HF boost issue:
- low-SNR quantization with SNR maximizing thresholds (always valid)
- improper point-stereo code (valid for q<6)
- noise normalizing code (valid for q<6)

With the test i performed i only checked for the first cause. This explains the discrepancy of my test result to your ABX results if you did those tests for q<6 and QK has done something to reduce the effect of the point-stereo code.

bye,
Sebastian
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