Data encoding and decoding within PRML class IV sampling data de

Details Data encoding and decoding within PRML class IV sampling data de Data encoding and decoding within PRML class IV sampling data de

1992-08-27

1993-11-09

Williams, Howard L.

Coded data generation or conversion

Digital code to digital code converters

Serial to parallel

341101, 341107, 341 95, 341 59, 360 46, 360 62, H03M 900, H03M 1312, G11B 509

Patent

active

052607038

ABSTRACT:
A serializer/deserializer encoder-decoder for a disk drive achieves increased storage capacity through the use of partial response maximum likelihood class IV (PRML-IV) coding. Reduction of hardware requirements is realized by the integration of similar read and write mode functions into common circuit elements in order to reduce duplication. To this end, a data word selector selectively receives or sends data words in the write/read mode, respectively, from a data sequencer. Dependent upon the mode the data words are either provided to an encoder or received from a decoder for translation to/from code words. The encoder-decoder sends or receives the code words to a code word selector which in turn connects with the serializer-deserializer for coupling with the write or read channel.

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