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Article #995Re: MP3 Vs ATRAC : Which is worse ?
From: jj, curmudgeon and tiring philal...
Date: Fri, 05 Feb 1999 00:00
Date: Fri, 05 Feb 1999 00:00
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In article <AKHu2.3415$ob2.4836@news.flash.net>, Arny KrοΏ½ger <arnyk@flash.net> wrote: >VQF is Yamaha's perceptual coder. See http://www.vqf.com/ . Seeing as it uses an NTT encoder, I assume that VQF is a cognate of the TWIN-VQ algorithm that was tested at MPEG-4 vs. AAC. TWIN-VQ offers some advantages at rates of 8kb/s for VERY low rate, very dirty audio, if I remember the results correctly, but in fact does not do as well as AAC at bit rates above about 24 kb/s, or maybe it was 16 kb/s. There was also a problem, if I recall, with stereo using TWIN-VQ, based on the fact its scalefactor model can't support sudden changes in scalefactor such as those that come about when doing switched M/S coding. -- Copyright jj@research.att.com 1999, all rights reserved, except transmission by USENET and like facilities granted. This notice must be included. Any use by a provider charging in any way for the IP represented in and by this article and any inclusion in print or other media are specifically prohibited.
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X-Google-Language: ENGLISH,ASCII X-Google-Thread: 109f11,8f9482d021558bd9 X-Google-Attributes: gid109f11,public X-Google-Thread: 10d85e,8f9482d021558bd9 X-Google-Attributes: gid10d85e,public X-Google-Thread: fb1f8,8f9482d021558bd9 X-Google-Attributes: gidfb1f8,public X-Google-Thread: 105a81,8f9482d021558bd9 X-Google-Attributes: gid105a81,public From: jj@research.att.com (jj, curmudgeon and tiring philalethist) Subject: Re: MP3 Vs ATRAC : Which is worse ? Date: 1999/02/05 Message-ID: <F6p8Dw.DMt@research.att.com> X-Deja-AN: 441123511 Sender: nntp@research.att.com X-Nntp-Posting-Host: canon.research.att.com References: <77bvje$q3o$3@justice.csc.cuhk.edu.hk> <79desg$9gh$1@ash.prod.itd.earthlink.net> <F6p074.9n5@research.att.com> <AKHu2.3415$ob2.4836@news.flash.net> Organization: New Jersey Home for the Terminally Confused Newsgroups: rec.audio.tech,rec.audio.opinion,rec.audio.misc,hk.rec.audio-visual