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- Path: sparky!uunet!stanford.edu!rutgers!njitgw.njit.edu!hertz.njit.edu!dic5340
- From: dic5340@hertz.njit.edu (David Charlap)
- Newsgroups: comp.sys.ibm.pc.hardware
- Subject: Re: MD: Sony's new Mini Disk technology
- Message-ID: <1993Jan11.220701.718@njitgw.njit.edu>
- Date: 11 Jan 93 22:07:01 GMT
- References: <1ir5f6INN8ql@darkstar.UCSC.EDU>
- Sender: news@njit.edu
- Distribution: na
- Organization: New Jersey Institute of Technology, Newark, N.J.
- Lines: 38
- Nntp-Posting-Host: hertz.njit.edu
-
- In article <1ir5f6INN8ql@darkstar.UCSC.EDU> 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. The
- >technology is still new so they go for $750, with prerecorded disks $16 and
- >recordable ones $20 or so.
- > I'm curious how adaptable MD's will be to pc's. On the surface it sounds
- >like they could replace current CD-ROM technology. Certianly the rewritability
- >will be greatly appreciated. Then again flopticals are only 21 mb on a 3.5"
- >optical disks. Hmm...
-
- Well, as far as price goes, it'll drop if and when it catches on.
- Remember that the orignal CD players were about $500. And read-only
- MD players run about that price today...
-
- The next question is that of capacity. If the MD player is at CD
- quality, it will record at about 44,000 16-bit samples per second. I
- believe the time-limit of a MD is 74 minutes. This yields 44,000 x 74
- x 60 = 195360000 or 186MW or 372MB. This is unformatted, of course.
-
- Now, comes the issue of speed. Since the unit is meant to record live
- audio, it must be able to record at least 44,000 16-bit samples per
- second. This comes up to 88,000 bytes per second, or 85K per second.
- A slow transfer rate, when compared to hard drives, but fast when
- compared to floppies. As for seek time, who knows. That much can't
- be derived from it's performance as an audio player.
-
- Naturally, the specs may be different from these, but one can expect
- these to be a minimum if it is truly a CD-quality recorder.
-
-
-
- --
- |) David Charlap | .signature confiscated by FBI due to
- /|_ dic5340@hertz.njit.edu | an ongoing investigation into the
- ((|,) | source of these .signature virusses
- ~|~
-