Title:
光ディスク装置及び光ディスク再生方法
Document Type and Number:
Japanese Patent JP4384239
Kind Code:
B2
Abstract:
According to one embodiment, a device includes a filter which limits a frequency bandwidth of a reproduced signal from an optical disc, an AD conversion module which converts an output signal from the filter into a multilevel digital signal, an equalizing module for equalizing a waveform of the multilevel digital signal based on a predetermined partial response class and generating an equalizing playback signal, a detection module for generating binary data corresponding to data recorded on the optical disc based on the equalizing playback signal, a module for determining an amplitude value of each of an input signal to and an output signal from the equalizing module with respect to each binary data sequence output from the detection module, and a module for adjusting a high-frequency amplification amount of the filter such that an amplitude value before waveform equalization and an amplitude value after waveform equalization satisfy a predetermined relationship.
More Like This:
| JP2591513 | OPTICAL DISK REPRODUCING DEVICE |
| JPH02260240 | OPTICAL DISK REPRODUCING DEVICE |
| JP2699960 | APPARATUS AND METHOD FOR REPRODUCING INFORMATION |
Inventors:
Hideyuki Yamakawa
Application Number:
JP2008139548A
Publication Date:
December 16, 2009
Filing Date:
May 28, 2008
Export Citation:
Assignee:
Toshiba Corporation
International Classes:
G11B7/005; G11B20/10
Domestic Patent References:
| JP2000105901A | ||||
| JP2004342290A | ||||
| JP2006351106A | ||||
| JP2000215609A | ||||
| JP2000156047A | ||||
| JP11185386A |
Attorney, Agent or Firm:
Takehiko Suzue
Kurata Masatoshi
Satoshi Kono
Makoto Nakamura
Yoshihiro Fukuhara
Takashi Mine
Toshio Shirane
Sadao Muramatsu
Nobuhisa Nogawa
Kocho Chojiro
Naoki Kono
Katsu Sunagawa
Katsumura Hiro
Ryo Hashimoto
Tetsuya Kazama
Shoji Kawai
Tatsushi Sato
Takashi Okada
Mihoko Horiuchi
Takenori Masanori
Takuzo Ichihara
Yamashita Gen
Kurata Masatoshi
Satoshi Kono
Makoto Nakamura
Yoshihiro Fukuhara
Takashi Mine
Toshio Shirane
Sadao Muramatsu
Nobuhisa Nogawa
Kocho Chojiro
Naoki Kono
Katsu Sunagawa
Katsumura Hiro
Ryo Hashimoto
Tetsuya Kazama
Shoji Kawai
Tatsushi Sato
Takashi Okada
Mihoko Horiuchi
Takenori Masanori
Takuzo Ichihara
Yamashita Gen