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AssigneeLite-On It Corporation
InventorsJeng-Jiun Chen, Bor-Ruey Chen, Chao-Jen Chen
Estimating the term…
A method and system for measuring the signal deviation are applied to an optical recording/reproducing apparatus. The optical recording/reproducing apparatus comprises an optical pickup head for receiving Differential Push Pull (DPP) signals reflected from an optical recording medium to trace the tracks on the surface of the optical recording medium. The DPP signal comprises a Main beam Push Pull (MPP) signal and a Sub-beam Push Pull (SPP) signal. The method firstly receives the MPP signal and the SPP signal to generate an MPP waveform and an SPP waveform separately. Then, the MPP waveform and the SPP waveform are combined to generate an amplitude waveform function. Finally, according to the amplitude waveform function, a phase difference between the MPP signal and the SPP signal is estimated. An adjusting direction can be further determined according to a relative position between the SPP waveform and the MPP waveform.
A method for measuring a signal deviation, applied to an optical recording/reproducing apparatus, the optical recording/reproducing apparatus comprising an optical pickup head for receiving a Differential Push Pull (DPP) signal reflected from an optical recording medium to trace tracks on a surface of the optical recording medium, the DPP signal comprising a Main beam Push Pull (MPP) signal and a Sub-beam Push Pull (SPP) signal, the method comprising the following steps:
A system for measuring a signal deviation, applied to an optical recording/reproducing apparatus, the optical recording/reproducing apparatus comprising an optical pickup head for receiving a Differential Push Pull (DPP) signal reflected from an optical recording medium to trace tracks on a surface of the optical recording medium, the DPP signal comprising a Main beam Push Pull (MPP) signal and a Sub-beam Push Pull (SPP) signal, the MPP signal and the SPP signal being transformed into an electronic signal to further be transported into an IC board in the optical recording/reproducing apparatus, the system comprising:
Dependencies are inferred from the claim text.