首页> 外国专利> TARGET LEVEL SETTING METHOD FOR A SIGNAL USED IN MAXIMUM-LIKELIHOOD DECODING IN PRML PROCESSING OF A SIGNAL REPRODUCED FROM AN OPTICAL INFORMATION RECORDING MEDIUM, PLAYBACK DEVICE FOR AN OPTICAL INFORMATION RECORDING MEDIUM, AND TARGET LEVEL SETTING PROGRAM FOR A SIGNAL USED IN MAXIMUM-LIKELIHOOD DECODING IN PRML PROCESSING

TARGET LEVEL SETTING METHOD FOR A SIGNAL USED IN MAXIMUM-LIKELIHOOD DECODING IN PRML PROCESSING OF A SIGNAL REPRODUCED FROM AN OPTICAL INFORMATION RECORDING MEDIUM, PLAYBACK DEVICE FOR AN OPTICAL INFORMATION RECORDING MEDIUM, AND TARGET LEVEL SETTING PROGRAM FOR A SIGNAL USED IN MAXIMUM-LIKELIHOOD DECODING IN PRML PROCESSING

机译：用于从光学信息记录介质中再现的信号，用于光学信息记录介质的回放设备以及用于信号中的信号的最大目标设定程序的PRML处理中的最大似然解码的信号的目标水平设置方法在PRML处理中

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摘要

Target levels in the PRML method are adaptively set under conditions of simplicity and a low cost. A method of setting target levels for reproduction of an optical information recording medium includes: a step of producing a reproduction signal from reflected light of laser light irradiated to an optical information recording medium; a step of performing waveform equalization processing, which depends on a predetermined partial response characteristic, on the reproduction signal so as to produce a waveform-equalized reproduction signal; a step of detecting peak levels for marks and spaces of a predetermined number of symbols from the waveform-equalized reproduction signal irrespective of a condition for a symbol adjoining each symbol; and a setting step of determining and setting values of a plurality of target levels, which is employed in Viterbi decoding and is arrayed with non-equal intervals among them, on the basis of the relative relationship among the detected peak levels.

机译：PRML方法中的目标水平是在简单和低成本的条件下自适应设置的。一种设置用于再现光学信息记录介质的目标电平的方法，包括：从照射到光学信息记录介质的激光的反射光产生再现信号的步骤;以及，对再现信号进行取决于预定的部分响应特性的波形均衡处理的步骤，以产生波形均衡的再现信号;一个步骤，从波形均衡后的再现信号中检测出预定数量的符号的标记和间隔的峰值电平，而与每个符号相邻的符号的条件无关。根据检测到的峰值水平之间的相对关系，确定和设定多个目标水平的值的设定步骤，该目标水平在维特比解码中采用并且在它们之间以不相等的间隔排列。

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公开/公告号EP2256733A4

专利类型
公开/公告日2013-04-10

原文格式PDF
申请/专利权人 TAIYO YUDEN CO. LTD.;
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申请/专利号EP20090714188
发明设计人 KAKIMOTO HIROYA;
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申请日2009-02-26
分类号G11B20/10;
国家 EP
入库时间 2022-08-21 16:33:54

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