WHAT IS A LASERVISION STANDARD VIDEODISC?
A videodisc is an analog video playback medium. It was first introduced in the early 1980s, and in its present form is known as the laservision videodisc and is a 12-inch plastic platter. There are two modes in which a videodisc can be made. The most familiar one is called “Extended Play” or CLV (Constant Linear Velocity). This mode is the one most commonly used for laserdisc movies. It has 60 minutes of play per side, does not allow “pause” or “still frame” function, and can randomly access chunks of motion sequences known as “chapters.” The other mode is called CAV (Constant Angular Velocity) and is the one used most often for interactive training. It has 30 minutes of motion play per side. The biggest difference is that the 30 minutes is the equivalent of 54,000 still frames, each one randomly accessible. The CAV mode is used for the SLICE OF LIFE VII and SLICE OF BRAIN I videodiscs because it allows us to encode tens-of-thousands of images onto one side of a videodisc. Each frame i
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