Re: [MP3 ENCODER] today's idea
If we don't use reservoir much optimally, it may not be difficult. Here is a quick hack of such adjustment. Some parameters in this code are not the best value. I see some 0.6 in your code. I only used it as an example and I've no real idea of what the value should be, but I'll have a look... -- Gabriel Bouvigne - France [EMAIL PROTECTED] icq: 12138873 MP3' Tech: www.mp3-tech.org -- MP3 ENCODER mailing list ( http://geek.rcc.se/mp3encoder/ )
[MP3 ENCODER] lame: quant_compare
Hi, Before the former -X n experimental settings in quant_compare are dropped entirely, I'd like to report about the experiences I made with these evaluation heuristics. 1) experimentalX=0 uses the most stable setting (and the default method). 2) experimentalX=6 (Robert's?) achieves the highest quality (for my liking). The sound seems to be clearer and more crisp. This mode also cooperates well with the high quality settings -q 3 to -q 0. (-h is identical to -q 2). 3) stabilty of experimentalX=6 is not optimal. I think this is the result of normalizing over_avg_noise to the number of bands with noise above threshold (over variable in calc_noise1). I don't think this is good. Normalisation to the number of bands instead is more stable and shows no regress in quality: - res-over_avg_noise = over ? (over_noise / over) : over_noise; + res-over_avg_noise = over ? (over_noise / count) : over_noise; over even: res-over_avg_noise = over_noise/count; (as far as count!=0). The new CVS versions use the -X switch for setting VBR_max_bitrate. To activate the old -X n settings for testing, initialize gfp-experimentalX = 6; (or other desired value) in lame.c. Regards, Alfred -- Sent through GMX FreeMail - http://www.gmx.net -- MP3 ENCODER mailing list ( http://geek.rcc.se/mp3encoder/ )
Re: [MP3 ENCODER] lame: quant_compare
Alfred Weyers schrieb am Sam, 17 Jun 2000: Hi, Before the former -X n experimental settings in quant_compare are dropped entirely, I'd like to report about the experiences I made with these evaluation heuristics. 1) experimentalX=0 uses the most stable setting (and the default method). 2) experimentalX=6 (Robert's?) achieves the highest quality (for my liking). The sound seems to be clearer and more crisp. This mode also cooperates well with the high quality settings -q 3 to -q 0. (-h is identical to -q 2). 3) stabilty of experimentalX=6 is not optimal. I think this is the result of normalizing over_avg_noise to the number of bands with noise above threshold (over variable in calc_noise1). I don't think this is good. Normalisation to the number of bands instead is more stable and shows no regress in quality: - res-over_avg_noise = over ? (over_noise / over) : over_noise; + res-over_avg_noise = over ? (over_noise / count) : over_noise; over even: res-over_avg_noise = over_noise/count; (as far as count!=0). The new CVS versions use the -X switch for setting VBR_max_bitrate. To activate the old -X n settings for testing, initialize gfp-experimentalX = 6; (or other desired value) in lame.c. Regards, Alfred Thanks Alfred, I chaned that your way and -Xn is enabled again. (it seemed to be a typo / cut and paste error disabling that switch) Robert -- MP3 ENCODER mailing list ( http://geek.rcc.se/mp3encoder/ )
