Ik CAV Is like encoded in frames and CLV Is just longer timer, any other differeneces?

A few (like CAAxx encoding, motor noise, or frame/field memory on players):

Which is Better, CLV or CAV?
CAV vs CLV motor noise level?
trick play on laserdisc
CAV-frame rate over time and whatnot ...
Players with full-frame digital effects

Julien

"Encoding" probably isn't the right word. The video signal on both is the same: standard-definition, interlaced analogue video. Both are divided into fields (alternating even or odd lines), not frames, at least not directly. The difference is that since each revolution of the disc in CAV covers exactly two fields, the player can loop those to the TV on pause without a frame buffer (which later players have, minimizing this difference), and if those two fields happen to be sourced from the same still frame (as it is with video from film sources unless you're between source frames at that moment, google 3:2 pulldown), the paused video appears as a coherent still image. CLV has a longer runtime because CAV is a relatively inefficient use of the disc. Because each rotation contains two fields, there is less video per inch the further out you extend from the center of the disc. It's the same "encoding" as CLV but in a simpler physical layout that has some beneficial side effects for older players.

CLV and CAV are actually concepts used much more broadly than just laserdiscs.

CAV really just means: "the disc spins at a constan RPM" and CLV really just means: "the disc slows down in RPMs as it plays".

Vinyl records are CAV (spin at a constant RPM), as well as hard drives. CDs (CD audio and CDROM) are CLV.

(a point of note: most CLV laserdisc aren't actually CLV, but are actually CAA...)

https://en.wikipedia.org/wiki/Constant_linear_velocity