公开(公告)号：MY122099A

公开(公告)日：2006-03-31

申请号：MYPI9804488

申请日：1998-09-30

Applicant: IBM

Inventor： KANAI TOSHIO ,  YASUDA TAKEO ,  TSURUTA KAZUHIRO ,  ICHIHARA WATARU

IPC: G11B7/005 ,  G11B7/00 ,  G11B20/10

Abstract: A METHOD AND APPARATUS FOR REDUCING THE EFFECT OF INTER-WAVE INTERFERENCE ON SIGNALS READ FROM A STORAGE MEDIUM AND TO PRECISELY DIGITIZE THE READ SIGNALS ARE DESCRIBED.AN APPARATUS FOR DIGITIZING A SIGNAL READ FROM A STORAGE MEDIUM ACCORDING TO AN EMBODIMENT OF THE INVENTION,COMPRISES:A PEAK DETECTOR (26),FOR DETECTING A PEAK VALUE FOR AN AMPLITUDE OF A SIGNAL READ FROM THE STORAGE MEDIUM;A THRESHOLD VALUE DETERMINER (28),FOR EMPLOYING THE PEAK VALUE OBTAINED BY THE PEAK DETECTOR TO DETERMINE A DETERMINE A COMPENSATION VALUE THAT IS USED FOR COMPENSATING FOR THE EFFECT OF INTER-WAVE INTERFERENCE ON THE SIGNAL,AND FOR EMPLOYING THE THRESHOLD VALUE CALCULATED BY THE CONVENTIONAL METHOD AND THE COMPENSATION VALUE TO DETERMINE A COMPENSATED THRESHOLD VALUE:AND A DIGITIZATION CIRCUIT (32),FOR DIGITIZATION THE SIGNAL BY USING THE THRESHOLD VALUE DETERMINED BY THE THRESHOLD VALUE DETERMINER.OPTIONALLY AN INTERPOLATOR (24) MAY BE USED TO OBTAIN MORE ACCURATE PEAK VALUE WITH OCCUR BETWEEN SAMPLE POINT. (FIG.2)

公开(公告)号：JPH11185385A

公开(公告)日：1999-07-09

申请号：JP34236397

申请日：1997-12-12

Applicant: IBM

Inventor： KANAI TOSHIO ,  YASUDA TAKAO ,  TSURUTA KAZUHIRO ,  ICHIHARA WATARU

IPC: G11B7/005 ,  G11B20/10

Abstract: PROBLEM TO BE SOLVED: To reduce the influence of the interference between waveforms of a reproducing signal from a storage medium and to accurately binarize the reproducing signal. SOLUTION: This data slicing circuit 100, for binarizing a reproducing signal from a medium in which data are stored, including a peak detecting circuit 28 for detecting the peak value of the amplitude of reproducing signal from the medium, a threshold deciding circuit 28, for determining a compensating value for compensating the influence of the interference between waveforms of the reproducing signal based on the peak value detected by the peak detecting circuit and determining a threshold value for binarizing the reproducing signal based on the peak value and the compensating value, and a circuit 32 for binarizing the reproducing signal based on the threshold value decided by the threshold deciding circuit, is provided.