| US 7,616,395 B2 | ||
| Information reproduction apparatus | ||
| Akira Yamamoto, Osaka (Japan) | ||
| Assigned to Panasonic Corporation, Osaka (Japan) | ||
| Appl. No. 11/660,517 PCT Filed Aug. 15, 2005, PCT No. PCT/JP2005/014907 § 371(c)(1), (2), (4) Date Feb. 20, 2007, PCT Pub. No. WO2006/019073, PCT Pub. Date Feb. 23, 2006. |
||
| Claims priority of application No. 2004-241590 (JP), filed on Aug. 20, 2004. | ||
| Prior Publication US 2007/0279784 A1, Dec. 06, 2007 | ||
| Int. Cl. G11B 5/09 (2006.01); G11B 5/02 (2006.01); G11B 20/20 (2006.01); G11B 15/12 (2006.01); G11B 19/02 (2006.01); G11B 20/00 (2006.01) | ||
| U.S. Cl. 360—51 [360/18; 360/24; 360/26; 360/27; 360/61; 369/47.28; 369/47.35; 369/47.15; 369/59.19] | 10 Claims |
| 1. An information reproduction apparatus including:
a data reading unit for reading a first signal including data information and timing information from an information recording
medium;
a first clock generation unit for generating a first clock;
a data conversion unit for processing the first signal at the timing of the first clock to obtain a second signal;
a timing detection unit for obtaining timing error information between the timing included in the first signal and the timing
of the first clock; and
plural branch metric calculation units for calculating plural branch metrics from the second signal and the timing error information
at the timing of the first clock;
wherein the first clock generation unit is controlled on the basis of the timing error information so that the frequency of
the first clock is always higher than the frequency of the timing included in the first signal.
|