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OPTICAL DISC APPARATUS CONTROLLING IRRADIATION POSITION BASED ON CROSS-CORRELATION VALUE BETWEEN REPRODUCTION SIGNAL AND DECODED SIGNAL
OPTICAL DISC APPARATUS CONTROLLING IRRADIATION POSITION BASED ON CROSS-CORRELATION VALUE BETWEEN REPRODUCTION SIGNAL AND DECODED SIGNAL
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机译:基于再现信号和解码信号之间的互相关值的光盘装置控制辐照位置
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摘要
In an optical disc apparatus for reproducing information recorded on a track of an optical disc, an optical head irradiates a light beam onto the track, detects a reflected light reflected by the track, and generates a reproduction signal based on the reflected light. A decoder circuit decodes the reproduction signal, and generates a decoded signal including information recorded on the track. A correlation detector circuit calculates a cross-correlation value between the reproduction signal and the decoded signal. A servo circuit detects a deviation amount of an irradiation position of the light beam onto the track, from the reproduction signal, and controls the irradiation position of the optical head based on the cross-correlation value and the deviation amount.
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