OPTICAL MEDIUM REPRODUCTION DEVICE AND OPTICAL MEDIUM REPRODUCTION METHOD

WIPO Patent Application WO/2015/022767

A1

An optical medium reproduction device that optically reproduces an optical medium on which multiple tracks are formed, said optical medium reproduction device having: a detection unit that divides the cross section of a beam returning from the optical medium into at least one channel corresponding to an outside region in a radial direction, at least one channel corresponding to a region having a different position in a tangential direction, and one channel corresponding to a region other than the aforementioned regions, and that forms detection signals for each of the channels; a multi-input equalizer unit that has multiple equalizer units to each of which the detection signal from one of the multiple channels is supplied respectively, and that outputs an equalization signal by calculating the outputs of the multiple equalization units, and sets the phase difference between two regions to a prescribed value; and a binarization unit that obtains binary data by performing a binarization process for the equalization signal.

NISHI NORIAKI (JP)
SAITO KIMIHIRO (JP)
SHIRAISHI JUNYA (JP)

PCT/JP2014/003412

February 19, 2015

June 26, 2014

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SONY CORP (JP)

G11B7/135; G11B7/005; G11B20/10

JPH08249664A	1996-09-27
JPH05242512A	1993-09-21
JPH03156729A	1991-07-04
JP2000048488A	2000-02-18
JP2012079385A	2012-04-19
JPH0793757A	1995-04-07
JP2001034969A	2001-02-09
JP2012079385A	2012-04-19

TOSHIYASU YOSHIZAWA: "Track Pitch o Tsumete Kiroku Mitsudo o 2 Bai ni shita Hikari Jiki Disk Sochi o Shisaku", NIKKEI ELECTRONICS, 19 March 1990 (1990-03-19), XP008182350
See also references of EP 3035332A4

SUGIURA, Masatomo et al. (JP)
Masatomo Sugiura (JP)

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