×

Efficient Chien search method and system in Reed-Solomon decoding

  • US 8,060,809 B2
  • Filed: 10/25/2007
  • Issued: 11/15/2011
  • Est. Priority Date: 08/24/2007
  • Status: Expired due to Fees
First Claim
Patent Images

1. A Chien search method in Reed-Solomon decoding, which is suitable for use in a processor having a parallel processing instruction set, the method comprising the following steps:

  • (a) if an error location polynomial that has been found matches a preset condition, finding at least one error symbol location according to the error location polynomial directly through table lookup, when a length of the error location polynomial is equal to a first predetermined value, looking up a pre-constructed first error location table to find said at least one error symbol location, wherein the number of said at least one error symbol location is equal to the first predetermined value;

    (b) if the error location polynomial does not match the preset condition, executing steps (c) to (e);

    (c) calculating an error evaluation value according to the error location polynomial;

    (d) if the error evaluation value is equal to 0, storing an error symbol location in an error location memory; and

    (e) if the error evaluation value is not equal to 0, the flow returning to step (c).

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×