Method and apparatus for generating error correction data, and a computer-readable recording medium recording an error correction data generating program thereon

An error correction data generating apparatus for generating error correction data, which is to be inserted into transmission data at specific insertion intervals, by calculating exclusive-OR of the transmission data, said apparatus comprising:

• an exclusive-OR cumulative calculation unit which cumulatively calculates exclusive-OR of the transmission data, said calculation being continuously performed independent of the insertion intervals;
• a storing means which stores a calculation obtained by said exclusive-OR cumulative calculation unit at the previous data insertion occasion, and
• an exclusive-OR insertion time point computing means which computes exclusive-OR between a calculation obtained by said exclusive-OR cumulative calculation unit at the scheduled time of the current insertion of the error correction data and the calculation which is obtained at the previous insertion occasion of the error correction data and is stored in said storing means, to generate error correction data to be inserted at the present insertion occasion.

A computer-readable recording medium in which is recorded a program for instructing a computer to generate error correction data, which is to be inserted into transmission data at specific insertion intervals, by calculating exclusive-OR of the transmission data, said program instructing the computer to execute the steps of:

• cumulatively calculating exclusive-OR of the transmission data, said calculation being continuously performed independent of the insertion intervals;
• and
• computing exclusive-OR between a calculation of the exclusive-OR obtained at the previous insertion occasion of the error correction data and a calculation of the exclusive-OR obtained at the scheduled time of the current insertion of the error correction data, to generate error correction data to be inserted at the present insertion occasion.