Title:
光ディスク記録再生装置
Document Type and Number:
Japanese Patent JP4896222
Kind Code:
B2
Abstract:
There is provided an optical disc recording/reproducing apparatus which can reduce the chip size using the high-miniaturization process and can enhance the detection accuracy. A signal which is obtained by amplitude-adjusting a header region in a reproduced signal detected by an optical pickup (1) is digitized, and peak detection or bottom detection from the reproduced signal in each of a first section and a second section in the header region is performed by detection circuits (9) to (12), respectively. Then, amplitude data in the first section and the second section are obtained by subtracters (13) and (14) from the detected values in the respective detection circuits. A difference in amplitude between the first section and the second section in the header region is obtained by a subtracter (15) based on the amplitude data, and the amplitude difference is outputted as an off-track error signal. The respective detection circuits (9) to (12) perform detection operations in the first and second sections, and hold the detection operations in the sections other than the first and second sections.
Inventors:
Ichiyanagi Dai
Mitsuru Sakai
Mitsuru Sakai
Application Number:
JP2009521515A
Publication Date:
March 14, 2012
Filing Date:
June 27, 2008
Export Citation:
Assignee:
Panasonic Corporation
International Classes:
G11B7/09
Domestic Patent References:
| JP2000339702A | 2000-12-08 |
Foreign References:
| WO2004086385A1 | 2004-10-07 |
Attorney, Agent or Firm:
Mitsuo Tanaka
Samejima Mutsumi
Hiroshi Okabe
Kazuhisa Inaba
Samejima Mutsumi
Hiroshi Okabe
Kazuhisa Inaba