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From: sundinKC@dna.lth.se (Anders Sundin)
Newsgroups: rec.audio.high-end
Subject: Re: What's up with RDAT?
Message-ID: <11583@uwm.edu>
Date: 30 Apr 91 13:00:19 GMT
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Ted Grusec (ted@dgbt.doc.ca) writes:
>For an excellent overview of DCC (Philips), including elucidation of
>the PASC coding scheme, economics, subjective listener evaluation,
>etc., see the series of short articles in the April 91 Stereophile. I
>am doing subjective evaluations in experiments with a similar coding
>scheme (Musicam) in the digital audio broadcasting domain, and, I must
>say, the results are very impressive. Most listeners cannot tell the
>difference between an original CD and the PASC encoded version, even
>though the latter reduces the bit rate by a factor of 6!

And then it deserves to be mentioned that PASC for DCC has uses twice as 
much data as MUSICAM for broadcasting. Philips has drawn (draws?) upon the 
experience from broadcasting tests to use all that extra data to further 
improve the already excellent performance of MUSICAM. This also makes the 
signal more robust for multiple generation decoding/encoding copying and 
people messing around wildly with the frequency response.

A question: Is the "18-bit" resolution hardwired into the system or is it 
consequence of the resolution of the surrounding AD/DA converters? 
The latter seems most likely but I have seen no solid data.

(Stereophile isn't imported to Sweden. How were the listening tests 
conducted, and what were the results?)

                                                             Jonas Palm

PS. I'm posting this from the account of a friend. 
Please don't hold him responsible. 

My own E-mail adress is: OK3JONAS@SELDC52.BITNET 
                         ok3jonas@gemini.ldc.se
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