DIGITAL SIGNAL RECORDER

PROBLEM TO BE SOLVED: To record an n+m bits word by real time processing by division parallel processing a channel word of n+m bits to a specified number and generating a selection control signal selecting the channel word having a required frequency characteristic. SOLUTION: A P/P conversion part 102 outputs the digital data of 8 bits inputted in parallel as parallel information words of 24 bits. A signal insertion part 104 inserts 0 bit or 1 bit to the information word of 24 bits inputted in parallel. A selection part 126 selects the channel word of 25 bits adding the 0 bit or the channel word of 25 bits adding the 1 bit according to the selection control signal. In such a manner, the channel word of the n+m bits inserting m bits to the information word of n bits is processed in parallel. Then, the n+m bits word is recorded by real-time processing by generating the selection control signal selecting the channel having a required frequency characteristic until before the next channel word of the n+m bits is inputted.