What does CLV and CAV mean?
Excerpted from Bob Niland’s (rjn@csn.org) LD#01: Rotation modes: LDs can be mastered for either constant linear velocity (CLV, variable rpm), like a CD, or constant angular velocity (CAV, constant rpm), like an LP. All consumer players can handle either format. Some releases even mix the modes, with the initial sides being CLV and the final side being CAV. Some films are initially released in both CLV and CAV “collectors” editions. CAV is also known as “standard play” or “full feature play”. Only CAV provides all motion control capabilities on all players (at the expense of more platters and shorter 30 minute sides). CAV also provides constantly improving signal-to-noise ratio as the program proceeds toward the outer edge, but this is typically not that noticeable on properly manufactured discs. CLV is also known as “extended play”. One hour per side playing time results in lower prices and less flipping. In return, you give up all the other CAV features, unless you have a high-end pla
