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US 2006/0133248 A1Published application
Data reproduction apparatus
AssigneePanasonic Corporation
InventorsYasushi Ueda, Toru Aoki, Makoto Okazaki, Nobuaki Noguchi
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Abstract
A fast synchronization pull-in and an optimum error correction are achieved in a reproduction apparatus for reproducing data recorded on a recording medium even in the case where the quality of input data involving a seek or defect is low. A seek amount detection block 190 is provided, a seek change signal 201 is generated, and the width of a synchronization detection window pulse 161 and a correction algorithm in a correction block 230 are modified.
Claims9
A data reproduction apparatus comprising:
- reproduction means of reproducing data recorded on a recording medium;
- clock count means of counting clocks based on data reproduced from said recording medium;
- window generation means of estimating the position of a synchronization signal in said reproduced data based on the count value of said clocks and generating a synchronization detection window signal having a predetermined width including the estimated position;
- synchronization signal detection means of detecting the synchronization signal from the data reproduced from said recording medium by searching within said synchronization detection window;
- and
- seek length detection means of monitoring a seek length when the data is reproduced from said recording medium;
- wherein said window generation means changes the width of said synchronization detection window signal for a predetermined period of time according to said monitored seek length.
4 more elements
Dependencies are inferred from the claim text.