Optical recording method and apparatus

摘要

There is disclosed an information recording/reproducing method in an information recording/reproducing apparatus comprising a recording medium having a disk-like shape, means for rotating the recording medium at a constant angular velocity, means for recording code information so that the bit length of the code information becomes approximately constant with respect to a radial position on the recording medium, means for modulating the code information to be recorded to form a modulated signal, and recording means for forming in the recording medium a localized recording region having a different physical property the recording means being controlled by the modulated signal so that the code information is recorded to correspond to the edge of the recording region, in which there is used a recording/reproducing system in which the bit rate of the code information to be recorded changes depending on a location on the recording medium, and a part of each of a recording characteristic and a reproducing characteristic is changed in accordance with a location on the recording medium.