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Detecting the differential phase error detector and phase error, generates the tracking error signal the difference manner
Detecting the differential phase error detector and phase error, generates the tracking error signal the difference manner
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机译:检测差分相位误差检测器和相位误差,以差分方式产生跟踪误差信号
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摘要
PROBLEM TO BE SOLVED: To generate a position error signal independently of a frequency component of recorded data in a differential phase detector for an optical disk recording device. ;SOLUTION: One pair of diagonal signals S1 and S2 are generated by adding each quadrant A-D of a quadripartite detector. Phase offset among these diagonal signals indicate a position error of an image of a pit at a point of time at which a image of a pit passes through an optical detector. This position error is obtained by calculating a difference between positive correlation and negative correlation of diagonal signals S1 and S2 which are called as dual arm correlation(DAC). Then, is correlation offset, L is correlation length. In a suitable actual mode, correlation of offset is adjusted to be suitable so that correlation between S1 and S2 is made the maximum.;COPYRIGHT: (C)1999,JPO
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