home *** CD-ROM | disk | FTP | other *** search
- Path: sparky!uunet!zaphod.mps.ohio-state.edu!caen!malgudi.oar.net!news.ysu.edu!psuvm!fwr100
- Newsgroups: comp.sys.ibm.pc.hardware
- Subject: Re: Sony Mini CD or Philips DCC format for computer DATA?
- Supersedes: <92351.152201FWR100@psuvm.psu.edu>
- Organization: Penn State University
- Date: Thu, 17 Dec 1992 13:42:38 EST
- From: <FWR100@psuvm.psu.edu>
- Message-ID: <92352.134238FWR100@psuvm.psu.edu>
- Lines: 45
-
- In article <IBE1109.92Dec16134212@etbsun1.draper.com>, ibe1109@draper.com (Ira
- Ekhaus) says:
- >
- >Hi,
- >
- >my local audio store says that the new Sony miniCD holds 74 minutes
- >of stereo audio and can be RECORDED onto.
- >
- >Now for 16 bit stereo audio without compression that's
- >74*60*44100*2*2 = 783 216 000
- >take into account compression factor of (~10) and we're
- >still talking over 70 Mbytes with a respectable transer rate.
- >The DCC's numbers are probably pretty similar.
- >
- >Does anyone know of plans to use this format as a backup or
- >distribution format for computer data?
- >It seems like a good idea, what's up?
-
- { corrections added due to E-Mails from people who know more than me :-) }
-
- I've been told that both compression and a lower sampling rate are used.
- Anybody know what the sampling rate, compression, and # of bits are?
- OPINION: Anything less than 16bit, 30KHz, 2:1 compression would really _suck_
- for audio purposes, so I'll assume that from here on out.
-
- Stereo, 16 bit, 74 minute, 30kHz, 2:1 compression = 266 MB say 240 formatted
-
- I haven't heard any announcements for a computer product usind the mini-CDs
- but I'd be shocked if this isn't on the shelves by next Christmas. The prices
- I've heard were (correct me if I'm wrong) $750 for the the recorder/player and
- $16 per disk. If you're using this with a computer, you can remove the
- digitizing equipment (fairly expensive) and replace it with a SCSI
- interface. Add $250 because it's a computer product, so for $1000 you've got
- a 240MB storage device. That's $4.17/MB for the first 240MB, 6.7 cents per MB
- afterwards.The initial cost is high, but the cheap media makes up for it.
-
- I've been told that the media can be re-written about 10 million times before
- wearing out. That shouldn't be too much of a problem for this type of disk -
- it will be slower than a hard drive, so you're not going to use it for very
- disk intensive apps (no Windows swapfile here). The directory track will be
- subject to wear, but 10 million is a lot of changes.
-
- Once again, anyone with different information, please correct me.
-
- -Frank
-