Patent ID: 6813237
Filing Date: 2004-11-02
Classification: G11B

Abstract:
An optical recording medium onto which recording information can be recorded optically, comprising:a first area where the recording information is recorded on groove tracks formed meanderingly so as to extract wobble signal; a second area where a phase pit string corresponding to control data required for reproduction control of the recording information is arranged meanderingly, the phase pit string having a pit depth so that it enables the control data to be read and reading of other data overwritten on the phase pit string is prevented; and a third area where a phase pit string corresponding to predetermined data is arranged meanderingly, the phase pit string having a pit depth so that it enables pre-pits including address information representing a recording position on said optical recording medium to be read and reading of other data overwritten on the phase pit string is prevented, wherein a meandering amplitude of said second area and a meandering amplitude of said third area are set so that output levels of wobble signals extracted from said second and third areas are approximately equal to an output level of the wobble signal extracted from said first area.