From VDAA06A@prodigy.com Fri Feb 24 11:03:21 EST 1995
Article: 25704 of alt.video.laserdisc
Path: casaba.srv.cs.cmu.edu!rochester!udel!news.bluesky.net!solaris.cc.vt.edu!swiss.ans.net!prodigy.com!usenet
From: VDAA06A@prodigy.com (Joe Ekaitis)
Newsgroups: alt.video.laserdisc
Subject: Impress your friends!  Amaze your family!
Date: 11 Feb 1995 15:50:17 GMT
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The next time the conversation turns to LaserDiscs, casually say "By the 
way, they haven't made CLV discs for the past few years."

After everyone looks at you like you've just dropped your pants, explain 
that the CLV format was replaced a few years ago by a format known as CAA,
 for Constant Angular Acceleration, even though the discs are still 
labeled CLV.

Constant Angular Acceleration means that the pit track is pressed on the 
disc in a spiral that becomes less tightly wound at the edge of the disc 
than at the center.  This was done to overcome the problems of adjacent 
track interference which shows up as herringbone interference that 
worsens toward the end of the disc.  Thus, while constant linear velocity 
is maintained, the angular movement of the laser across the disc speeds 
up.

To avoid confusion, all CAA discs are labeled CLV.

And now you know.   :)

-
 /\/\  Joe Ekaitis  
/ .. \ vdaa06a@prodigy.com
 '--'