Circuit of encoding and formatting data for rotating head record

Details Circuit of encoding and formatting data for rotating head record Circuit of encoding and formatting data for rotating head record

1989-07-06

1992-04-21

Smith, Jerry

Excavating

371 376, 371 501, G06F 1110

Patent

active

051075059

ABSTRACT:
A circuit for encoding and formatting data, the circuit having an input suitable for receiving a data stream in the form of bytes, the circuit comprising firstly a working memory in which the data is stored in the form of a matrix, and from which the data is taken sequentially, with the data being stored and taken by means of respective different sequences (either by being stored in lines and then taken in columns, or else by being stored in columns and then taken in lines), and secondly first and second encoder means each suitable for calculating, respectively for each line and for each column, a given number of redundancy bytes which are respectively horizontal redundancy bytes and vertical redundancy bytes (with one of said encoding means being connected to the outlet of said memory), wherein the first and second encoding means are connected in parallel to the output from the memory, with said second encoding means (for performing redundancy calculations corresponding to the sequence opposite to that by which the data is taken from the memory) being suitable for storing intermediate results in the calculations performed thereby.

REFERENCES:
patent: 4336612 (1982-06-01), Inoue et al.
patent: 4365332 (1982-12-01), Rice
patent: 4398292 (1983-08-01), Doi et al.
patent: 4602383 (1986-07-01), Ogawa et al.
patent: 4607367 (1986-08-01), Ive et al.
patent: 4719628 (1988-01-01), Ozaki et al.
patent: 4769819 (1988-09-01), Matsutani et al.

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