Dynamic information storage or retrieval – Binary pulse train information signal – Including sampling or a/d converting
Reexamination Certificate
2006-07-20
2010-12-14
Chow, Lixi (Department: 2627)
Dynamic information storage or retrieval
Binary pulse train information signal
Including sampling or a/d converting
C369S059210, C369S059110
Reexamination Certificate
active
07852728
ABSTRACT:
A digital signal reproducing apparatus includes an analog to digital converter for sampling and quantizing a signal read from an optical recording medium in accordance with a reproduced clock having a frequency which is one-half of a channel bit frequency and outputting an obtained digital RF signal, an offset compensation circuit for reducing an offset component in an amplitude direction from the digital RF signal, and a simplified interpolation filter for reconstructing a signal indicating a predetermined pattern recorded in the optical recording medium from the output signal of the offset compensation circuit and outputting the reconstructed signal. A control operation is performed to reduce the magnitudes of respective values shown by first phase error information on a section with the predetermined pattern and by second phase error information on a section other than the section with the predetermined pattern.
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Chinese Office Action, w/ English translation thereof, issued in Chinese Patent Application No. CN 200680026137.8 dated Mar. 26, 2010.
Hiraki Tatsushi
Ogura Youichi
Takao Yorikazu
Chow Lixi
McDermott Will & Emery LLP
Panasonic Corporation
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