METHOD FOR ENCODING DATA BLOCK TO GENERATE REDUNDANT INFORMATION ACCORDING TO SYMBOL LENGTH CODE, METHOD FOR ENCODING DATA SUBJECTED TO BLOCK FORMAT PROCESSING RECEIVED BY ENCODER AS SERIES OF DATA WORD ACCORDING TO SYMBOL LENGTH REED SOLOMON CODE AND WORD FORM ENCODER

摘要

PROBLEM TO BE SOLVED: To obtain an encoder circuit in response to a storage length code and a word clock signal by forming the word form encoder with four GF adders, two fixed value g₁ multipliers and two storage registers. ;SOLUTION: A parallel input word for encoder has two fixed value g₁ multipliers 22, four GF adders 20, and two storage registers 24, 26 being registers R₀, R₁ for registering. The encoder 18 has two inputs 21, 23 to which data bytes m_i+1, m_i is received. A combination between a term produced from feedback of initial contents V_i, W_i of the registers R₀, R₁ on lines 25, 29 in one word clock cycle and the incoming data bytes m_i+1, m_i is obtained at an output of the adders 20 and the multipliers 22 of the encoder. The longest propagation path in this encoder is a path passing through the two fixed value g₁ multipliers 22 and the three GF adders 20.;COPYRIGHT: (C)1997,JPO