Code sequence generation method, modulation apparatus, modulation method, modulation program, demodulation apparatus, demodulation method, demodulation program and storage medium

A data encoding apparatus comprising

• a correlation table where a data sequence with a predetermined number of bits is associated with a code sequence with a predetermined number of bits, said data sequence being translated into said code sequence to allow a predetermined demodulation section to demodulate said code sequence into said data sequence in accordance with said correlation table, wherein
• said code sequence is NRZI format comprising a MSN code sequence where a null point of a frequency spectrum on a recording channel or communication channel of said code sequence is matched with a null point of a frequency spectrum of a PR equalized signal including said code sequence and a minimum run length is limited to be greater or equal to one.

A data encoding method executed by a microprocessor controlled system comprising:

• generating a signal in accordance with a correlation table where a data sequence with a predetermined number of bits is translated into a code sequence with a predetermined number of bits, said data sequence being translated as said code sequence to allow a demodulation section to demodulate said code sequence into said data sequence in accordance with said correlation table, wherein
• said code sequence is NRZI format comprised of a MSN code sequence where a null point of a frequency spectrum on a recording channel or communication channel of said code sequence is matched with a null point of a frequency spectrum of a PR equalized signal including said code sequence and a minimum run length is limited to be greater or equal to one.

A data encoding program executed by a microprocessor controlled system for causing the microprocessor controlled system to execute:

• data encoding in accordance with a correlation table where a data sequence with a predetermined number of bits is associated with a code sequence with a predetermined number of bits, said data sequence being translated into said code sequence to allow a decoding section to decode said code sequence into said data sequence in accordance with said correlation table, wherein
• said code sequence NRZI format comprised of a MSN code sequence where a null point of a frequency spectrum on a recording channel or communication channel of said code sequence is matched with a null point of a frequency spectrum of a PR equalized signal including said code sequence and a minimum run length is limited to be greater or equal to one.

A data decoding apparatus comprising:

• a decoding section that decodes a signal in accordance with a correlation table where a data sequence with a predetermined number of bits is associated with a code sequence with a predetermined number of bits, said code sequence having been previously generated by translating said data sequence into said code sequence, wherein
• said code sequence is NRZI format comprised of a MSN code sequence where a null point of a frequency spectrum on a recording channel or communication channel of said code sequence is matched with a null point of a frequency spectrum of a PR equalized signal including said code sequence and a minimum run is limited to be greater or equal to one.

A data decoding method executed by a microprocessor controlled system comprising:

• decoding a signal in accordance with a correlation table where a data sequence with a predetermined number of bits is associated with a code sequence with a predetermined number of bits, said code sequence having been previously generated by translating said data sequence into said code sequence, wherein
• said code sequence is NRZI format comprising a MSN code sequence where a null point of a frequency spectrum on a recording channel or communication channel of said code sequence is matched with a null point of a frequency spectrum of a PR equalized signal including said code sequence and a minimum run is limited to be greater or equal to one.

A data encoding program stored in an electronic memory of an information processing apparatus for causing the information processing apparatus to execute:

• demodulating a signal in accordance with a correlation table where a data sequence with a predetermined number of bits is associated with a code sequence with a predetermined number of bits, said code sequence having been previously generated by translating said data sequence into said code sequence, wherein
• said code sequence is NRZI format comprising a MSN code sequence where a null point of a frequency spectrum on a recording channel or communication channel of said code sequence is matched with a null point of a frequency spectrum of a PR equalized signal including said code sequence and a minimum run is limited to be greater or equal to one.

A storage medium storing a plurality of code sequences with predetermined bits that have been translated from data with predetermined bits, wherein

• the code sequences are demodulated in accordance with a correlation table such that a data sequence with a predetermined number of bits is associated with a code sequence with a predetermined number of bits, said code sequence having been previously generated by translating corresponding data sequences into said plurality of code sequences,
• each said code sequence is NRZI format comprising a MSN code sequence where a null point of a frequency spectrum on said storage medium is matched with a null point of a frequency spectrum of a PR equalized reproduction signal including said code sequence and a minimum run is limited to be greater or equal to one.