04562577 is referenced by 77 patents and cites 3 patents.

A shared encoder/decoder circuit for use with a Reed-Solomon coding scheme of an optical disk storage system. The optical disk system includes a drive adapted to permanently store data on a removable platter. Prior to recording a data byte on the platter, the data is encoded with a Reed-Solomon code. When the data is read from the disk, it is decoded and error correction syndromes are generated. The same circuitry is shared for performing the encoding and decoding functions. This circuitry includes independent sets of a RAM, coupled to one input of an exclusive OR (modulo two sum) adding circuit. The output of the adding circuit is fed back to an input to the RAM. Two multiplier circuits are coupled to the output of the RAM. A product of one is tied to one input of the modulo two addition circuit. The product of the other is combined with similar products from other sets, and the resulting combination signal is selectively connected to the other input of the modulo two addition circuit, along with data to be recorded on the platter, or data read from the platter.

Title
Shared encoder/decoder circuits for use with error correction codes of an optical disk system
Application Number
6/533828
Publication Number
4562577
Application Date
September 19, 1983
Publication Date
December 31, 1985
Inventor
S Robert Perera
Boulder
CO, US
Michael J O Keeffe
Longmont
CO, US
Neal Glover
Broomfield
CO, US
Agent
James R Young
Bryant R Gold
Assignee
Storage Technology Partners II
CO, US
IPC
G06F 11/10
View Original Source