Rate 16/17 (0,5) modulation code apparatus and method for partia

Details Rate 16/17 (0,5) modulation code apparatus and method for partia Rate 16/17 (0,5) modulation code apparatus and method for partia

1998-04-13

2000-04-04

Williams, Howard L.

Coded data generation or conversion

Digital code to digital code converters

To or from minimum d.c. level codes

360 40, 341 59, H03M 700

Patent

active

06046691&

ABSTRACT:
A system and method employing a rate 16/17 (0,5) code constructed in accordance with a set of pivot bits and a set of corrections for predefined code violations limits the number of consecutive zeros seen by a channel to five. The rate 16/17 (0,5) code is suitable for magnetic or similar recording media and may be employed in partial response maximum likelihood read channels. A feature of the constructed code is a high transition density which allows for more frequent timing and gain control updates, which results in lower required channel input signal to noise ratio for a given channel performance. Each constructed codeword is block encodable and block decodable, and the code construction allows for efficient circuit implementation in both an encoder and a decoder.

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