Dynamic information storage or retrieval – Binary pulse train information signal – Binary signal gain processing
Patent
1997-10-06
2000-12-19
Hindi, Nabil
Dynamic information storage or retrieval
Binary pulse train information signal
Binary signal gain processing
369 54, 369 58, G11B 700
Patent
active
061635162
ABSTRACT:
A disc reproduction apparatus and method to reproduce an optical disc using a constant linear velocity (CLV) method. The disc reproduction apparatus includes an equalizer to receive a signal read from the optical disc and equalizing the received signal according to an equalization control signal, and a wide-capture range phase-locked loop (wide PLL) to perform a phase lock operation with regard to the received equalized signal based on a phase lock control signal. An automatic adjuster selects one of predetermined phase lock control value, according to a type of an optical disc to be used and reproduction velocity determined during initial operation, and a desired target position to read the data from the optical disc, and generates a phase lock control signal having the selected value. A correction unit selects one of a predetermined first equalization control value and a second equalization control value which is generated by the wide PLL and relates to a phase lock operation, according to the desired target position, and generates an equalization control signal having the selected equalization control value. Accordingly, the disc reproduction apparatus optimizes the characteristics of the equalizer, in the case of reproducing data from a compact disc (CD), a digital video disc (DVD), etc., at various reproduction velocities, using a constant linear velocity method and a wide-capture range phase-locked loop.
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Hindi Nabil
Samsung Electronics Co,. Ltd.
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