Title:
周波数制御装置、周波数制御方法、制御プログラム、情報再生装置および情報再生方法
Document Type and Number:
Japanese Patent JP4156595
Kind Code:
B2
Abstract:
A frequency and phase control apparatus (100) includes an analog/digital conversion section (2) for converting a reproduction signal (62) into a multiple bit digital signal (64); a maximum likelihood decoding section (4) for converting the multiple bit digital signal into a binary signal (66); a pattern detection section (50) for detecting a pattern of the binary signal; and a determination section (11) for determining whether or not the multiple bit digital signal and the clock signal are in synchronization with each other based on the detection result (74,75). When the determination result (67) of the determination section indicates that the multiple bit digital signal and the clock signal are in synchronization with each other, the maximum likelihood decoding section generates a binary signal based on a first state transition rule ( Figs. 12 , 18 , 20 ); otherwise, the maximum likelihood decoding section generates a binary signal based on a second state transition rule ( Figs. 13 , 19 , 21 ).
Inventors:
Harushun Miyashita
Ken Nakajima
Naohiro Kimura
Ken Nakajima
Naohiro Kimura
Application Number:
JP2004546427A
Publication Date:
September 24, 2008
Filing Date:
October 20, 2003
Export Citation:
Assignee:
Matsushita Electric Industrial Co., Ltd
International Classes:
G11B20/14; G11B20/10; G11B20/18; G11B27/30; H03L7/091; H03L7/107; H04L7/033; H04L7/04
Domestic Patent References:
| JP10125010A | ||||
| JP9147499A | ||||
| JP2000124815A |
Attorney, Agent or Firm:
Hidesaku Yamamoto
Takaaki Yasumura
Takeshi Oshio
Takaaki Yasumura
Takeshi Oshio