DEVICE FOR CALCULATING COEFFICIENT OF ERROR-EVALUATOR POLYNOMINAL IN A RS DECODER

摘要

The invention leads to about the error evaluation coefficient calculation of the polynomial apparatus in Solomon decoder, Galois field multiplier for the output by multiplying the coefficients (σ _i) of the coefficients of the syndrome polynomial from the outside (S _i) and the error locator polynomial (1 )Wow; A galloise adder (3) for adding and outputting a value output from the galloise multiplier (1) and an intermediate value; A multiplexer (5) for selectively outputting a value output from the galloise adder (3) or a coefficient (σ _i ) of an error position polynomial input from the outside; A demultiplexer (7) for demultiplexing and outputting the value output from the first multiplexer (5); A latch unit (9) for latching and outputting values output through the demultiplexer (7); And a second multiplexer 11 for inputting the value output through the latch unit 9 to the galloche adder 3 as an intermediate value, and outputting it as a coefficient Ω _i of an error evaluation polynomial. The coefficient of the error evaluation polynomial can be calculated.