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US 6,912,099 B2Granted
Maximum likelihood detection of asynchronous servo data employing interpolation
AssigneeAgere Systems Inc.
InventorsViswanath Annampedu, Pervez M. Aziz
Life of this patent
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AssigneeAgere Systems Inc.
InventorsViswanath Annampedu, Pervez M. Aziz
Estimating the term…
A repeatable run-out (RRO) detector employs one or more digital interpolators to interpolate asynchronous sample values representing an RRO address mark (AM) and RRO data, an asynchronous maximum-likelihood (AML) detector to detect the RRO AM, and a RRO data decoder to decode the RRO data. The AML detector employs an AML algorithm, such as a Viterbi algorithm, to detect the series of peaks of the RRO AM based on detection of the entire sequence of observed peaks. AML detection selects one of either the asynchronous or interpolated sample sequences that are closest in distance to the ideal RRO AM sample sequence. Once the RRO AM is detected, the AML detector provides a RRO AM found signal as well as the selected one of the sample sequences having the best phase for detecting and decoding the RRO data.
An apparatus for detecting data in a sample sequence read from a recording channel, the apparatus comprising:
A method of detecting data in a sample sequence read from a recording channel comprising the steps of:
A computer-readable medium having stored thereon a plurality of instructions, the plurality of instructions including instructions which, when executed by a processor, cause the processor to implement a method for detecting data in a sample sequence read from a recording channel, the method comprising the steps of:
Dependencies are inferred from the claim text.