Loading patent…
AssigneeHewlett-Packard Development Company, L.P.
InventorCarl P. Taussig
Estimating the term…
The write-timing calibration involves (1) writing a calibration data sequence referenced to a physical timing clock (such as a wobble clock on a DVD disk), (2) measuring the timing offset or phase offset between the calibration data sequence and the clock, (3) writing a test data sequence using the same or a different recording device, (4) measuring the timing offset or phase offset between the test data and the clock, (5) comparing the timing offsets of the calibration and test data sequences, with respect to the clock, (6) iteratively adjusting the timing of the beginning of the write process, and repeating steps (3), (4) and (5) until the timing offsets are equal to within a defined tolerance, and (7) Adjusting the delay of the write driver relative to the clock by the amount determined in step (6), for equal timing offsets of the calibration and test data sequences. This process calibrates the timing of bits written on DVD formats by different recording devices so that the start position of edited data sequences is repeatably collocated with previous data sequences to a precision better than +/−0.06 μm.
A method of calibrating timing of recorded data, said method comprising:
An apparatus for calibrating the timing of a write process, said apparatus comprising:
Dependencies are inferred from the claim text.