Method and apparatus for implementing post-modulation error corr

Details Method and apparatus for implementing post-modulation error corr Method and apparatus for implementing post-modulation error corr

1990-01-12

1994-05-10

Baker, Stephen M.

Excavating

371 391, H03M 1300

Patent

active

053115210

ABSTRACT:
A method of and apparatus for providing error correction coding for a block of user data in which the user data is initially modulated by a first modulator and then the modulated user data is error correction encoded to produce a first plurality of check bits. The first plurality of check bits are then modulated by a second modulator whose output is then fed to a second error correction encoder which produces a second plurality of check bits. The modulated user data, the first plurality of check bits and the second plurality of check bits are all fed to a shift register where the error correction encoded user data block is formed, useful with magnetic and optical storage devices.

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