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- Newsgroups: comp.sys.amiga.misc
- Path: sparky!uunet!spool.mu.edu!umn.edu!csus.edu!netcom.com!damiel
- From: damiel@netcom.com (Paul Theodoropoulos)
- Subject: Re: Reasons for Amiga CD-ROM
- Message-ID: <1992Dec31.101812.17316@netcom.com>
- X-Spook-Fodder: hero heroin tree shrub bush birth life death FBI CIA NSA
- Organization: Netcom - Online Communication Services (408 241-9760 guest)
- References: <1hqcs4INN4tb@pith.uoregon.edu> <1992Dec29.221442.7137@pro-freedom.cts.com> <C03vrC.79J@NeoSoft.com> <C043q8.8pC@news.iastate.edu>
- Date: Thu, 31 Dec 1992 10:18:12 GMT
- Lines: 77
-
- In <C043q8.8pC@news.iastate.edu> barrett@iastate.edu (Marc N. Barrett) writes:
- > I doubt it. Cassettes recently got a reguvenation, from new DAT drives that
- ^j
- >can store digitally on ordinary cassettes, and play old analog-written
- >cassettes. This is highly attractive to people who have lots of old cassettes
- >and want to still be able to use them.
-
- the new DCC (digital compact cassette) *is* digital audio tape, but it is
- misleading to refer to it as DAT, which is in fact R-DAT. DCC is closer to
- the original S-DAT specification, but even here the comparison fails, because
- while S-DAT specified CD style data and sampling rates, DCC employs data
- *reduction* algorithms on the incoming signal.
-
- further, DCC recorders record on DCC media, not on ordinary cassettes as
- stated above.
-
- platter media enjoy the inherent advantage of virtually instantaneous random
- access of the information encoded on them. this is why DAT has never been
- a barn-burner, and why DCC will suffer the same fate.
-
- i see nothing to preclude a person who still owns conventional audio cassettes
- from keeping and playing those cassettes if they choose to invest in mini-disc
- technology.
-
- the sad part of it is that both DCC and mini-disc use the aforementioned
- data reduction, and do not have audio specs as good as CD. and since CD
- is certainly not the ultimate in reproduction technology, we are taking a
- step *back* in quality. not a good trend - but that's another story.
-
- > Read-write CDs have been promised for some time. They are here already,
- >but only in very-expensive units that can only erase and re-write a CD a
- >very limited number of times, and only to special CDs.
-
- magneto-optical recordable media can be rewritten an unlimited number of
- times. this is the technology used in the mini-disc. prices are falling
- steadily on the CD format drives. and *of course* its to a special CD - it
- has to be a rewritable medium. or were you planning on writing over your
- existing CD-ROMS?
-
-
- > Even after read-write CDs do finally arrive, the manufacturing costs of
- >such CDs will likely be higher than for CD-ROMs. So I expect CD-ROMs to stick
- >around for a long while even after read-write CDs are available, especially if
- >all read-write CD drives are rigged so that they cannot be used to copy
- >CD-ROMs. The audio industry will almost certainly insist on circuitry to
- >prevent read-write CD drives from copying audio CDs, and the software
- >publishing industry may get on the bandwagon by insisting on similar circuitry
- >for CD-ROMs. If so, CD-ROMs would continue to be very attractive distribution
- >medium for software publishers.
-
- uh, this makes little sense. first, the manufacturing cost of rewritable
- CDs is no more a factor than for rewritable magnetic media - yes, its
- obviously more expensive to make a rewritable disc, but not significantly
- more so than CD-ROM discs - and relative to harddisk media, it is an order of
- magnitude less expensive. rewritable disks will be purchased by end-users, not
- by distributors (by and large). CD-ROMS will still be employed for prerecorded
- data distribution.
-
- but - "if...CD drives are rigged so that they cannot be used to copy CD-ROMS."
- ??? its digital data, marc. if someone doesn't want their CD-ROM disk copied,
- they can use copy protection on the disk, just like they do now. are harddisk
- drives rigged so that you can't copy proprietary software onto them? no. same
- difference with rewritable CD drives. the "rigging" is in the software code,
- not the drive/media.
-
- CD audio is stored in a different data format than CD-ROM data.
- In fact, a recorder has to be specifically *designed* to record CD
- audio data, since CD audio data is realtime, streaming information,
- unlike CD-ROM data. and anyway, the Q subcode channel indicates whether a
- disk is copyable, and also indicates whether a disk is CD audio or CD-ROM.
-
- the number of plain factual errors in your post borders on the ridiculous,
- marc. please, rather than just manufacturing "information", you might try
- reading about that which you pontificate.
- --
- paul theodoropoulos damiel@netcom.com (hooools@well.sf.ca.us)
- Cosysop - Threat Management Institute BBS 707 935 1713
-