Improved decoder

Details Improved decoder Improved decoder

1988-05-12

1990-03-13

Canney, Vincent P.

Dynamic magnetic information storage or retrieval

General processing of a digital signal

In specific code or form

341 95, G11B 509, H03M 704

Patent

active

049087215

ABSTRACT:
A data decoding system includes a data retrieval device which retrieves encoded data from a mass-storage device and transmits the data to a serial-to-parallel shift register. The shift register, operating at the data transfer rate, converts the encoded data to a parallel stream of bit-pairs. The bit-pairs are then transmitted, over parallel lines, to a second shift register which is operating at one-half the data transfer rate. The second shift register stores a sufficient number of the bit-pairs to constitute a byte of binary data when decoded. Once enough bit-pairs are stored, a ROM, operating at a rate which is slower than the data transfer rate, decodes the information to form a byte of binary data. The system utilizes a data retrieval system with a high data transfer rate and processing circuitry with a reduced bandwidth requirement to produce decoded data at a rate which is comparable to the data transfer rate.

REFERENCES:
patent: 4496934 (1985-01-01), Furukawa
patent: 4502036 (1985-02-01), Furukawa
patent: 4549167 (1985-10-01), Kato et al.
patent: 4553131 (1985-11-01), Endoh
patent: 4598267 (1986-07-01), Fukuda
patent: 4672362 (1987-06-01), Furukawa et al.

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