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- From: jrm@gnv.ifas.ufl.edu
- Newsgroups: sci.electronics
- Subject: "Super-CD" ... soon ?
- Message-ID: <1992Jul29.183848.1367@gnv.ifas.ufl.edu>
- Date: 29 Jul 92 18:38:47 -0500
- Lines: 34
-
- Amid the moans and groans of audiophiles and some musicians over the
- less-than-perfect sound reproduced by digital methods (CDs in partic)
- I have been hearing of a new device that might put an end to the
- unhappiness. Apparently, a blue(ish) semiconductor laser has been
- made lately. Most CD players use an infrared laser which outputs at
- around 1000 nanometers. This new device hits the blue-green area of
- the spectrum, around 500 nm. What this will allow is for a CD pit of
- half the current physical size to be resolved, immediately doubling
- the information capacity of a CD or CD-ROM.
-
- Higher resolution should also allow the inter-track distances to be
- tightened-up. We can assume that tracking mechanisms/methods will
- constantly improve so it should be no prob to cope with this.
-
- What all this makes possible is the "SUPER-CD". Such a unit offers three
- major capabilities. Firstly, it should be able to play existing disks,
- which would be no problem. Secondly, it could play disks recorded at
- the current sampling rate/depth, but which contain twice (or more)
- program material. Thirdly, an 'audiophile' pressing could be made that
- uses the extra capacity to store music recorded at a much higher
- sampling rate & depth than the current standard. This extra resolution
- should negate any difference in sound quality between the beloved
- vinyl disks of old and digital.
-
- Given that downwards compatibility should be easy ... I see no reason
- that "Super CD" could not take-off the moment the new lasers are
- availible in bulk. Given that we would also hear the end of the eternal
- snobby complaining about inferior digital sound - the effort would
- be well worth it. Sell the first 50,000 units at $2500 each to the
- dedicated and well-financed audiophiles - and then cut the price to
- $199.95 for the mass market :-)
-
- -- Jim Mason
- -- Analog must die !
-