Patent ID: 11935561
Assignee: MARVELL ASIA PTE LTD
Field: Audio-visual technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 0:
1. A method of reading servo wedge data from a rotating constant-density magnetic storage medium having a plurality of tracks, wherein each track is written at a respective track pattern frequency, the respective track pattern frequencies varying from a lowest track pattern frequency at an innermost one of the plurality of tracks to a highest track pattern frequency at an outermost one of the plurality of tracks, the method comprising:
for each respective track:
determining, based on the respective track pattern frequency of the respective track, a desired sampling position;
sampling actual samples of servo wedge data from the respective track based on a sampling clock used for all tracks, the sampling clock having a sampling frequency at least equal to the track pattern frequency of the outermost one of the plurality of tracks;
determining a phase relationship of the desired sampling position to the sampling clock;
on determining that the desired sampling position bears a first phase relationship to the sampling clock:
interpolating an interpolated sample at the desired sampling position based on an interpolation clock; and
on determining that the desired sampling position bears a second phase relationship to the sampling clock:
omitting interpolation, and
squelching the interpolation clock.