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- From: mbk@poincare.ucsd.edu (Matt Kennel)
- Newsgroups: rec.audio
- Subject: Re: Sony's SBM CD Mastering
- Date: 31 Jul 1992 04:03:17 GMT
- Organization: Institute For Nonlinear Science, UCSD
- Lines: 28
- Message-ID: <15ae25INNr03@network.ucsd.edu>
- References: <1992Jul29.235552.18085@ntg.com>
- NNTP-Posting-Host: poincare.ucsd.edu
- X-Newsreader: Tin 1.1 PL3
-
- dplatt@ntg.com (Dave Platt) writes:
- : In article <1992Jul28.221729.13569@cbnewse.cb.att.com> acgd@cbnewse.cb.att.com (andrew.charles) writes:
- : As I understand it (based on an article in the current issue of Audio),
- : the SBM technique is basically a noise-shaping technique. It shifts the
- : spectrum of the quantization noise (produced during the 20->16 bit
- : truncation) so that it's concentrated at frequencies at which the human
- : ear is less sensitive. The total amount of quantization-noise energy
- : isn't reduced, but its impact on our ears is.
-
- If in fact it does sound better, does this imply that a system with
- true >16 precision all the way could sound audibly better than the present
- one? And I thought the original 16 bit resolution was decided upon because
- listening tests did not show any audible improvement with increasing precision,
- or am I being naive?
-
- : Well, it was _recorded_ with 20-bit technology, _mastered_ and
- : _reproduced_ with 16-bit technology, and the 20->16 conversion wasn't
- : a simple roundoff or truncation.
-
- And probably a better guarantee that all 16 bits are going to be used.
-
- : Dave Platt VOICE: (415) 813-8917
- : Domain: dplatt@ntg.com UUCP: ...netcomsv!ntg!dplatt
- : USNAIL: New Technologies Group Inc. 2468 Embarcardero Way, Palo Alto CA 94303
-
- --
- -Matt Kennel mbk@inls1.ucsd.edu
- -Institute for Nonlinear Science, University of California, San Diego
-