公开(公告)号：US3510786A

公开(公告)日：1970-05-05

申请号：US3510786D

申请日：1967-07-25

Applicant: IBM

Inventor： PAULSON DAVID H

IPC: G11B20/14 ,  H04L7/00 ,  H03K5/18

CPC classification number: H04L7/00 ,  G11B20/1423

公开(公告)号：US3631422A

公开(公告)日：1971-12-28

申请号：US3631422D

申请日：1969-02-03

Applicant: IBM

Inventor： KRAJEWSKI WILLIAM F ,  PADALINO MARCO ,  PAULSON DAVID H

IPC: H03M5/14 ,  G06K7/00 ,  G11B20/14 ,  H04L25/49 ,  G11B5/04

CPC classification number: G11B20/1423

Abstract: A system is provided in which data processed in digitally encoded form is detected using an inverse algorithm of the encoding process and the predictable nature of errors which may be introduced by the processing media. In one example, a measurement of the time interval between each adjacent pair of data signal transitions derived from a magnetic recording media is adjusted to compensate for speed variations of the recording media, and the adjusted measurement is categorized according to the predictable nature of bit shift introduced by the recording media. Logic circuitry responds to each categorized time interval measurement to determine the data denoted thereby in terms of data detected from the immediately preceding time interval.

公开(公告)号：CA906650A

公开(公告)日：1972-08-01

申请号：CA906650D

Applicant: IBM

Inventor： PAULSON DAVID H ,  PADALINO MARCO ,  KRAJEWSKI WILLIAM F

IPC: G11B20/14