Recording medium and recording or reproducing apparatus therefor for recording or reproducing control information

A recording or reproducing apparatus comprising,

• a memory unit having an information area in which set values of a recording pulse used when forming a recording mark having a predetermined length are recorded as recording or reproducing control information when information is recorded to or reproduced from a recording medium that records information by forming spaces and the recording mark having the predetermined length as an integral multiple of a channel clock T, wherein
• the set values of the recording pulse used when forming the recording mark having the predetermined length include preceding space-based set values that are defined based on a preceding space formed so as to precede the recording mark and trailing space-based set values that are defined based on a trailing space formed so as to trail the recording mark,
• the preceding space-based set values are defined by a reference table including a first reference value that is a set value of a recording pulse corresponding to a preceding space of 5T or more and a first difference set value which is a set value of a recording pulse corresponding to a preceding space of 2T, 3T, and 4T other than the preceding space of 5T or more and which is expressed as a difference from the first reference value, and
• the trailing space-based set values are defined by a reference table including a second reference value that is a set value of a recording pulse corresponding to a trailing space of 5T or more and a second difference set value which is a set value of a recording pulse corresponding to a trailing space of 2T, 3T, and 4T other than the trailing space of 5T or more and which is expressed as a difference from the second reference value.