Patent ID: 8400903

Claim:
An optical information recording medium comprising: a first area in which a content is recorded by forming recording marks, one or more of the recording marks being shorter than a length of a resolution limit of an optical system in a reproducing device; and a second area in which medium identification information for specifying a type of the medium is recorded as a form of concavities and/or convexities formed during production of the optical information recording medium, the concavities and/or convexities as a form of which the medium identification information is recorded, being not shorter than the resolution limit of the optical system, in the second area, in order to allow digitization of an analogue waveform obtained during reproduction of information recorded in the first area, information being recorded as a form of concavities and/or convexities that are not shorter than the resolution limit of the optical system in the reproducing device, the information being information for determining a linear velocity in reproduction of the content recorded in the first area so that digital processing is carried out with respect to the content by use of a reproduction clock which is identical to a reproduction clock that is used to carry out digital processing with respect to the second area, and in the second area, a test area being further provided closer to the first area than the information for determining a linear velocity, the test area being an area in which the reproducing device adjusts laser power.