OPTICAL INFORMATION RECORDING MEDIUM

摘要

PURPOSE:To improve recording density by performing the multiplex-recording of several kinds of information on both edge parts of a guide groove by making both edge parts of the guide groove meander independently corresponding to additional information. CONSTITUTION:The meandering of the guide groove G2 formed on an optical disk D is performed corresponding to a first carrier signal in which the edge part g21 on one side is frequency-modulated by first additional information, and it is performed corresponding to a second carrier signal in which the edge part g22 on the other side is frequency-modulated by second additional information. In such a case, the frequencies of the first and second carrier signals are selected as the ones not giving disturbance on a servo signal and data. Thereby, it is possible to improve the recording density by performing the multiplex-recording of the plural kinds of information on both edge parts of the guide groove, respectively.