Title:
再生装置及び再生方法
Document Type and Number:
Japanese Patent JP4331202
Kind Code:
B2
Abstract:
A readback apparatus calculates (3, 4) a variance value of a signal read by a head from a disc medium, estimates (5) a degree of offtracking of the head from a target track to an adjacent track, and interference power from the adjacent track using the variance value of the signal, calculates (7) a soft decision likelihood value for the signal using the degree of offtracking and the interference power, and performs (8) error correcting decoding using the soft decision likelihood value.
Inventors:
Kosuke Harada
Application Number:
JP2006348003A
Publication Date:
September 16, 2009
Filing Date:
December 25, 2006
Export Citation:
Assignee:
Toshiba Corporation
International Classes:
G11B20/18; G11B20/10
Domestic Patent References:
| JP2002367291A | ||||
| JP2003068024A | ||||
| JP2005166089A | ||||
| JP2005286624A |
Attorney, Agent or Firm:
Takehiko Suzue
Satoshi Kono
Makoto Nakamura
Kurata Masatoshi
Takashi Mine
Yoshihiro Fukuhara
Sadao Muramatsu
Ryo Hashimoto
Satoshi Kono
Makoto Nakamura
Kurata Masatoshi
Takashi Mine
Yoshihiro Fukuhara
Sadao Muramatsu
Ryo Hashimoto