Data transmission apparatus and data transmission method

A data transmission apparatus, comprising:

• error correction code adding means for preliminary adding an error correction code for transmission error to information data prior to processing said information data by a predetermined transmission method to generate error correction code added data;
• storing means for storing said error correction code added data and operative to output the same in parallel to a Plurality of channels;
• a plurality of format converting means provided for the respective channels of said storing means for converting the error correction code added data output from the respective channels to transmission data having a transmission format in accordance with said predetermined transmission method;
• transmitting means for transmitting said transmission data to a transmission line in accordance with said predetermined transmission method;
• wherein said storing means rearranges said information data and said error correction code into an array corresponding to the transmission format and divides said rearranged information data and error correction code into blocks of a predetermined unit to generate block data;
• wherein said storing means generates block data comprised of said rearranged information data and said error correction code divided into blocks for each predetermined unit of data and stores the same for each said block of data;
• and
• wherein said format converting means has at least one buffer memory means for temporarily storing said block data.