Loading patent…
AssigneeCirrus Logic, Inc.
InventorsWilliam G. Bliss, David E. Reed, Richard T. Behrens
Estimating the term…
A sampled amplitude read channel is disclosed for reading binary data from a computer disk storage system, wherein the read channel sub-samples an analog read signal at a rate lower than the baud rate and detects the binary data from the sub-sampled values using a sequence detector. In one embodiment, the sub-sampled values are interpolated to generate synchronous sample values which are processed by a conventional sequence detector. In another embodiment, the sequence detector is modified to detect the binary data directly from the sub-sampled values. In yet another embodiment, the sequence detector comprises a remodulator and an error pattern detector for detecting and correcting bit errors in the detected binary data. In addition, for the various embodiments a channel code increases the distance property of the sequence detector in order to compensate for the degradation in performance caused by sub-sampling.
A sampled amplitude read channel for reading binary data from a sequence of interpolated discrete time sample values generated by sampling pulses in an analog read signal from a read head positioned over a disk storage medium, the binary data recorded at a predetermined baud rate, the read channel comprising:
A sampled amplitude read channel for reading binary data from a sub-sampled sequence of discrete time sample values generated by sub-sampling pulses in an analog read signal from a read head positioned over a disk storage medium, the binary data recorded at a predetermined baud rate, the read channel comprising:
A sampled amplitude read channel for reading user data from a sequence of interpolated discrete time sample values generated by sampling pulses in an analog read signal from a read head positioned over a disk storage medium, the user data encoded into codewords according to a code rate<1, the codewords recorded to the disk storage medium at a predetermined baud rate, the read channel comprising:
A sampled amplitude read channel for reading user data from a sequence of interpolated discrete time sample values generated by sampling pulses in an analog read signal from a read head positioned over a disk storage medium, the user data encoded into codewords according to a code rate<1, the codewords recorded to the disk storage medium at a predetermined baud rate, the read channel comprising:
A method for reading binary data from a sequence of discrete time sample values generated by sampling pulses in an analog read signal from a read head positioned over a storage medium, comprising:
Dependencies are inferred from the claim text.