Patent ID: 6157604
Filing Date: 2000-12-05
Classification: G11B,H03L,H03M,H04N

Abstract:
A sampled amplitude read channel for reading binary data recorded on an optical disk storage medium at a predetermined baud rate by detecting an estimated binary sequence from a sequence of sample values of an analog read signal emanating from an optical transducer positioned over the optical disk storage medium, the sampled amplitude read channel comprising:(a) a sampling device for asynchronously sampling the analog read signal to generate a sequence of asynchronous sample values;(b) digital timing recovery for extracting a data clock from the asynchronous sample values;(c) a baud rate estimator for generating an estimated baud rate of the binary data in the analog read signal relative to a sampling period of the sampling device, the estimated baud rate for use in initializing the digital timing recovery; and(d) a data detector for detecting the estimated binary sequence.