Patent ID: 6131179
Filing Date: 2000-10-10
Classification: H03M

Abstract:
A Reed-Solomon decoding device comprising:a decoding calculation input parameter calculating means that generates the input parameters used in decoding calculations, including a syndrome and an erasure position from a data string,a decoding means that performs the decoding calculations by using the decoding calculation input parameters based on the command codes providing the prescribed decoding calculation operations, and generates decoding calculation output parameters including error value data and error position data,a correcting means that performs correction operations by using the decoding calculation output parameters,a storage means that selectively stores the decoding calculation input parameters that are output to the decoding calculating means, and the decoding calculation output parameters that are output to the correction operation means, andan input/output means that switches the input data string, stores the data words for a C1 code in a first storage section, and stores the data words for a C2 code in a second storage section;wherein during the execution of the input/output relating to the data words of the C1 code by the input/output means, the decoding calculation input parameter calculating means generates decoding calculation input parameters relating to the data words of the C1 code, and the decoding calculating means performs decoding calculations relating to the data words of the C2 code,and during the execution of the input/output relating to the data words for the C2 code by the output means, the decoding calculation input parameter calculating means generates the decoding calculation input parameters relating to the data word for the C2 code, and the decoding calculating means performs the decoding of groups relating to the data words or the C1 code.