Laser disc signal monitoring and control
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United States of America Patent
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N/A
Issued Date -
Jan 8, 2004
app pub date -
Jul 3, 2002
filing date -
Jul 3, 2002
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
An algorithm for controlling laser power in recording datum including a first recorded pulse and at least one second pulse uses measurements of the recorded datum including peak pulse value, plateau value and a bias value. Average value of the measurements are used with the programmed laser power peak value and a datum envelope value in the algorithm to determine if laser power is to be adjusted, and the sign of calculated values is used to determine positive or negative adjustments. Acquisition circuitry uses a write clock signal which must be delayed in accessing the written datum (WRF).
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