Any Dolby Digital 5.1 music CD?

Posted by Nigel Pond [SysOp] [IP: 206.241.18.4] on August 23, 1999 at 10:08:42
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In Reply to: Any Dolby Digital 5.1 music CD? posted by Jonas A on August 22, 1999 at 16:58:08:

Jonas

: Yes, Useing the CD-DA Logo should definitely be avoided, in my opinon not for technical reasons as much as for avoiding to confuse the consumer.

Which is part of the reason why the trademark license, in theory, only allows the CDDA logo to be used on Red Book compliant discs.

: If it would be prohibited by legal reasons however is hard to say unless Sony/Philips for some reason decides to sue, for example, Telarc for useing it on a DTS disc (However, for such a case to actually see the inside of a courtroom would be _very_ unlikley)...

It is prohibited by the terms of the license, as I understand it. Whether the trademark owners would ever seek to enforce the license and, if so, whether it would reach a trial or be settled, are different questions. About 90% of filed claims never make it to court - just because they don't doesn't mean they are not valid claims.

: When i talked about the contents I meant the PCM-data, not the formatting information such as flags, TOC, etc...
: Seen as PCM-data the DTS bitstream is very ugly indeed, yes! But being ugly isn't illegal.. :-)

But putting the ugly, non-PCM, data on a disc bearing the CD logo is technically in breach of the license.

: No offence, but I naively thought that the Red Book specifications where there to assure that the PCM-data recorded on the disc would be played regardless of what it is, not to regulate the contents of the PCM-data in itself.

But that's exactly what the Red Book does - specify the nature of the digital data on the disc - to ensure that all CDs bearing the CD logo comply with the same sort of standards - and DTS ain't specified...

If you are old enough to remember the quad fiasco, one of the reasons why quad was a flop was that there were several incompatible formats around causing consumer confusion...

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