Optical recording

Optical recording

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There is no guarantee that the decoder clock will be synchronized with the data pattern, or that the scan velocity will even be the ... Velocity variations can result from motor-speed fluctuations, disk de- center, thermal expansion of the disk, vibration, and so on. In some systems (i.e., CD or videodisc players) a third closed-loop servo system is provided to correct the scan ... Low-frequency drift might be caused by media reflectance variations, which alter the signal baseline, or sensitivityanbsp;...

Title:Optical recording
Author:Alan B. Marchant
Publisher:Addison-Wesley Longman - 1990


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