OPTICAL DISK UNIT AND PHASE SHIFT DETECTION METHOD APPLIED TO OPTICAL DISK UNIT

OPTICAL DISK UNIT AND PHASE SHIFT DETECTION METHOD APPLIED TO OPTICAL DISK UNIT

PROBLEM TO BE SOLVED: To detect a phase shift of a reproduction signal to improve the recording precision of an optical disk in an optical disk drive. SOLUTION: A first measuring pulse-row signal generation circuit 23 generates a first measuring pulse-row signal that rises in synchronization with th...

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Hauptverfasser: NAGUMO OSAMU, MARUYAMA YOICHI
Format: Patent
Sprache:eng
Schlagworte:
INFORMATION STORAGE
INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER
PHYSICS
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creator NAGUMO OSAMU
MARUYAMA YOICHI
description PROBLEM TO BE SOLVED: To detect a phase shift of a reproduction signal to improve the recording precision of an optical disk in an optical disk drive. SOLUTION: A first measuring pulse-row signal generation circuit 23 generates a first measuring pulse-row signal that rises in synchronization with the reproduction signal and falls in synchronization with a clock signal. A second measuring pulse-row signal generation circuit 24 generates a second measuring pulse-row signal that rises in synchronization with the clock signal and falls in synchronization with the reproduction signal. A jitter measuring unit 25 measures jitters in the first measuring pulse train signal and the second measuring pulse train signal. The phase shift in the reproduction signal is detected based on the measured jitters. COPYRIGHT: (C)2006,JPO&NCIPI
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subjects INFORMATION STORAGE
INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER
PHYSICS
title OPTICAL DISK UNIT AND PHASE SHIFT DETECTION METHOD APPLIED TO OPTICAL DISK UNIT
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