Patent ID: 6760173
Filing Date: 2004-07-06
Classification: G11B

Abstract:
A detector for detecting the location of a synchronization mark in a data stream read from a recording medium of a mass data storage device, comprising:a matched filter arranged to receive selected bit combinations of a received data sequence containing said synchronization mark being shiftable, said matched filter being constructed to produce an output value that is of maximum magnitude when said synchronization mark has just been shifted from a previous next time interval; and a â€œDâ€  element for receiving said output value from said matched filter to produce a â€œDâ€  element output; wherein when said â€œDâ€  element output is greater or equal to a predetermined threshold value and is larger than said output value, said synchronization mark is in a current time location, and wherein when said â€œDâ€  element output is greater or equal to said predetermined threshold value and is less than or equal to said output value, said synchronization mark is in a next time location.