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From: rjn@hpfcso.HP.COM (Bob Niland)
Newsgroups: comp.ivideodisc
Subject: Re: How much can be put on a videodisc
Message-ID: <11050002@hpfcso.HP.COM>
Date: 1 Dec 90 20:56:00 GMT
References: <10527@ur-cc.UUCP>
Organization: Hewlett-Packard/FSY Ft.Collins,CO,USA
Lines: 31

re: > Voila!  I found a little more detail on what info goes onto a CD-XX
    > disc.  CD-V (CD-Video) 20 minustes of music PLUS 5 minutes of video
    > with sound; the video is not full motion AT THIS TIME, because the CD
    > specs can't handle the bandwidth.

If you are referring to the consumer 5-inch CDV media, this is not true.
After the 20 minute audio segment near the inner hub, the CDV5 can contain
just shy of 6 minutes of full-motion video.  Combi players always play the
video track first, then backspace to the audio-only (accompanied by a drop
in rotation rate from ~1800 rpm to ~180 rpm).

I have several of these discs in NTSC, and as far as I can tell, the only
difference between CDV5 video and ordinary LD8 and LD12 LaserVision (now
LaserDisc) standard video is that the CDV5 has ONLY digital sound (no FM
analog sound).  To my knowledge, no new CDV5 titles have been released in
the last 18 months, and Polygram/Polydor (the major label in CDV5) has
announced that they will do no more.

Note also:  early NTSC LD8 and LD12 digital sound releases often bear the
"CD-Video" logo.  Until Pioneer surrendered their trademark rights to the
term "LaserDisc", PAL LD8s and LD12s with digital sound were also called
"CDV".  (Since, unlike NTSC discs, PAL discs can't have both digital and
analog sound, the older analog PAL discs were called "LV".)

I'm told there is also a 5-inch technology called "CVD", about which I know
nothing.

Regards,                                              Hewlett-Packard
Bob Niland                                            3404 East Harmony Road
Internet: rjn@hpfcrjn.FC.HP.COM                       Fort Collins
UUCP: [hplabs|hpu*!hpfcse]!hpfcrjn!rjn                CO          80525-9599


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