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1.发明申请公开(公告)号：US20200327906A1
公开(公告)日：2020-10-15
申请号：US16304873
申请日：2017-05-01
申请人： SONY CORPORATION
摘要： Provided are an apparatus and a method for generating a reproduction signal with reduced laser noise. There are provided a photodetector (PD) that irradiates a disk with laser light and outputs a signal based on a reflected light from the disk, a front monitor that outputs a reference signal based on an emitted light of a laser diode, and a data detection processing unit to which an output signal of the PD is input to generate a reproduction signal. The data detection processing unit includes a reproduction signal adaptive equalizer that outputs an equalization signal by adaptive equalization processing based on the PD output signal, and a laser noise adaptive equalizer that outputs the equalization signal by the adaptive equalization processing based on a laser noise signal, and generates the reproduction signal in which the laser noise is reduced on the basis of an arithmetic operation result of the output of the reproduction signal adaptive equalizer and the output of the laser noise adaptive equalizer.
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公开(公告)号：US20190325908A1
公开(公告)日：2019-10-24
申请号：US16460435
申请日：2019-07-02
申请人： SONY CORPORATION
摘要： Provided are a device and a method which are capable of performing crosstalk-removed high-quality data reproduction from a high-density recording type optical disc. The device includes a photo detector that outputs a readout signal from a reproduction track of an information recording disc, an adjacent track reproduction binary signal supply unit that outputs a binary signal (binary data) which is a reproduction signal of an adjacent track of the reproduction track, a multi-input adaptive equalizer that includes an equalizer unit that receives the readout signal from the reproduction track and an adjacent track reproduction binary signal and outputs an equalization signal by an adaptive equalization process based on an input signal, and a binarization processing unit that executes a binarization process based on the equalization signal and generates a reproduction signal of the reproduction track.
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公开(公告)号：US20180358047A1
公开(公告)日：2018-12-13
申请号：US15780090
申请日：2017-01-12
申请人： SONY CORPORATION
CPC分类号： G11B7/005 , G11B7/131 , G11B7/133 , G11B20/10009 , G11B20/10046
摘要： Provided are a device and a method which are capable of performing crosstalk-removed high-quality data reproduction from a high-density recording type optical disc. The device includes a photo detector that outputs a readout signal from a reproduction track of an information recording disc, an adjacent track reproduction binary signal supply unit that outputs a binary signal (binary data) which is a reproduction signal of an adjacent track of the reproduction track, a multi-input adaptive equalizer that includes an equalizer unit that receives the readout signal from the reproduction track and an adjacent track reproduction binary signal and outputs an equalization signal by an adaptive equalization process based on an input signal, and a binarization processing unit that executes a binarization process based on the equalization signal and generates a reproduction signal of the reproduction track.
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4.发明申请公开(公告)号：US20170270957A1
公开(公告)日：2017-09-21
申请号：US15505442
申请日：2015-11-09
申请人： SONY CORPORATION
CPC分类号： G11B7/007 , B29D17/005 , G11B7/00454 , G11B7/005 , G11B7/1381 , G11B7/258 , G11B7/263 , G11B20/00086 , G11B20/10009 , G11B20/10046 , G11B23/281 , G11B23/284
摘要： Provided is an optical medium reproducing apparatus including: a detection unit that divides a luminous flux into a plurality of regions including a first region and a second region which are different in a position in a radial direction and/or a tangential direction, and combines a plurality of detection signals in correspondence with the amount of light that is incident to each of the plurality of regions with combination patterns which are selected to form signals of a plurality of channels; a multi-input equalizer unit that includes a plurality of equalizer units to which the signals of the plurality of channels are respectively supplied, computes outputs of the plurality of equalizer units, and outputs the resultant value as an equalization signal; and a binarization unit that performs binarization processing with respect to the equalization signal to obtain binary data. An addition signal channel including a constant multiplication of detection signals of the first region and the second region is included in at least one of the combination patterns.
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