Method and apparatus for coding information, method and apparatus for decoding coded information, method of fabricating a recording medium, the recording medium and modulated signal

A coding device, comprising:

• a converter receiving m-bit information words and converting the m-bit information words into n-bit code words, where m and n are integers, n is greater than m, wherein the n-bit code words are divided into a first type and a second type and into coding states of a first kind and a second kind, such that an m-bit information word is converted into an n-bit code word of the first or second kind if the previous m-bit information word was converted into an n-bit code word of the first type and an m-bit information word is converted into an n-bit code word of the first kind if the previous m-bit information word was converted into an n-bit code word of the second type.

A recording medium comprising:

• a modulated signal recorded in a track, the modulated signal including signal portions representing n-bit code words, each n-bit code word representing each m-bit information word, where m and n are integers, and n is greater than m,
• wherein the n-bit code words are divided into a first type and a second type and into coding states of a first kind and a second kind, an m-bit information word is represented by an n-bit code word of the first or second kind if the previous m-bit information word is represented by an n-bit code word of the first type and an m-bit information word is represented by an n-bit code word of the first kind if the previous m-bit information word is represented by an n-bit code word of the second type.

A method of decoding, comprising:

• receiving n-bit code words, where n is integer;
• and
• converting the n-bit code words into m-bit information words, wherein m is an integer less than n, and the n-bit code words are divided into a first type and a second type and into coding states of a first kind and a second kind, such that an m-bit information word is represented by an n-bit code word of the first or second kind if the previous n-bit code word is represented by an n-bit code word of the first type and an m-bit information word is represented by an n-bit code word of the first kind if the previous n-bit code word is of the second type.

A decoding device, comprising:

• a converter receiving n-bit code words, and converting the n-bit code words into m-bit information words, wherein m and n are integers, m is less than n, and the n-bit code words are divided into a first type and a second type and into coding states of a first kind and a second kind, such that an m-bit information word is represented by an n-bit code word of the first or second kind if the previous n-bit code word is represented by an n-bit code word of the first type and an m-bit information word is represented by an n-bit code word of the first kind if the previous n-bit code word is of the second type.