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- Path: sparky!uunet!dziuxsolim.rutgers.edu!pilot.njin.net!csc
- From: csc@pilot.njin.net (Sean Casey)
- Newsgroups: comp.sys.ibm.pc.hardware
- Subject: Re: MD: Sony's new Mini Disk technology
- Message-ID: <Jan.12.15.41.00.1993.9847@pilot.njin.net>
- Date: 12 Jan 93 20:41:01 GMT
- References: <1ir5f6INN8ql@darkstar.UCSC.EDU>
- Distribution: na
- Organization: Rutgers Univ., New Brunswick, N.J.
- Lines: 24
-
- paladin@ucscb.UCSC.EDU (Robin Yang) writes:
-
- | Sony recently introduced a new generation of music compact disks--2.5"
- |in diameter with the same playing time as a normal CD. The key differences
- |other than size are its caddy (it looks like a smaller version of a 3.5"
- |floppy disk) and re-writability--more than one million times per bit.
-
- Two very important key differences are:
-
- Lossy compression. These disks are not CD quality. I've read some
- reviews where people were able to to hear differences, especially
- during quiet passages. Naturally this means nothing if they're used to
- store data, except that they don't hold as much raw data as a CD.
-
- SCMS. These players have built-in copy protection. This becomes quite
- an issue when one considers an external controller. Allow absolute
- access to the disk and one can zero out the SCMS bits. I.e. make a
- copy of a CD, and then deprotect that copy, allowing infinite copies
- to be made from it. This copy protection may be adaptable to software.
- So will manufacturers produce an MD that allows full access to the
- media format? Who knows. No doubt it's patented and no doubt Sony can
- dictate parameters of use.
-
- Sean
-