Patent ID: 6963296

Claim:
A recording method for using a plurality of coding tables to subject an input data word of 8 bits to 8-15 modulation and to thereby obtain a code word of 15 bits, in which said plurality of coding tables store the code words corresponding to the respective input data words, and state information indicating the coding table for use in modulating a next input data word to obtain a next code word satisfying a predetermined run length restriction rule even with the next code word coupled directly with the code word, and a recording signal generated by inserting a synchronous signal for decoding reproduction data into every predetermined number of code words in a string of the code words satisfying said predetermined run length restriction rule and to be outputted is outputted on a recording medium side or a transmission medium side, said method comprising: adding auxiliary information including a sector address and a parity by a product code to said input data word continuously inputted to constitute an ECC block; subjecting said input data word in a format signal formatted in a predetermined format with respect to the ECC block to the 8-15 modulation to generate a string of code words satisfying said predetermined run length restriction rule; and inserting the synchronous signal including a bit pattern longer than a maximum run length of said predetermined run length restriction rule into every predetermined number of code words to generate the recording signal.