an apparatus for accessing dvd data . in the apparatus for accessing the data of a dvd , a row data buffer and an error detection code file are added . the row data buffer stores the row data from the row data interface , and the error detection code file records the error detection code stored in the memory . when an error occurs in the error detection code , the error detection code in the error detection code file may be modified . in addition to the normal data access , the method of accessing dvd data only re - access for certain error occurring during rspc decoding .