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From:
Brian Behlendorf
To:
quentin
Cc:
Date:
Mon, 28 Oct 1996 02:47:27 -0800 (PST)
Subject:
Re: (idm) can a CD can hold 80 minutes of music? (fwd)
Msg-Id:
<Pine.BSI.3.95.961028022803.19997E-100000@taz.hyperreal.com>
In-Reply-To:
<ae947d3d03021004ebf5@[204.191.202.234]>
Mbox:
idm.9610.gz
On Wed, 23 Oct 1996, quentin wrote:
quoted 4 lines well, I don't really think it's going to matter all that much in a year or> well, I don't really think it's going to matter all that much in a year or > so when the dvd's(digital video disk, same size as a cd!) come out... I > mean, what was it, 8 hours of cd quality audio or 4 hours of digital > video???
Current CD data capacity: 650 megs Max possible DVD capacity[1]: 17 gigs 17000/650 = 26.15; 26.15 * 74 minutes = 1935 minutes, or just short of 32 hours. If you want to go crazy, today you can do MPEG-2 audio compression at 10:1 with pretty much zero loss of quality (or at least not discernable from noise) if you're using a good encoder - 320 hours of music, anyone? That's 16 hours short of two weeks. :) The catch is that the current DVD specs don't appear to have an "audio-only" format which would facilitate such massive sound storage (this just from reading up on it for 10 minutes) but since it'll also have a data format (just like CD-ROM's) the potential is there to do whatever ya want. Brian [1] http://www..cd-info.com/CDIC/Technology/DVD/dvd-faq.html#6.0 --=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-- brian@hyperreal.com http://www.apache.org http://www.organic.com/jobs