Recording medium recognition information recording method, recording medium recognition information recording apparatus, and recording disc

A recording medium recognition information recording method for recording recognition information to a recording medium which has a recognition information recording area for recording the recognition information, at least the recognition information recording area being capable of additionally having information recorded thereto,

• wherein, in recording digitized recognition information to the recognition information recording area, either the “1” or “0” is modulated to a signal having a constant frequency and the other is modulated to a non-signal state, and the signals corresponding to the constant frequency and the non-signal state are written to the recognition information recording area.

A recording medium recognition information recording apparatus for recording recognition information to a recording medium loaded therein, the recording medium having a recognition information recording area for recording the recognition information, at least the recognition information recording area being capable of additionally having information recorded thereto, the recording medium recognition information recording apparatus comprising:

• means for recording digitized recognition information to the recognition information recording area,
• the recognition information recording means modulating the “1” to a signal having a first frequency and modulating the “0” to a signal having a second frequency, and writing the signals corresponding to their respective frequencies to the recognition information recording area.

A recording medium recognition information recording apparatus for recording recognition information to a recording medium loaded therein, the recording medium having a recognition information recording area for recording the recognition information, at least the recognition information recording area being capable of additionally having information recorded thereto, the recording medium recognition information recording apparatus comprising:

• means for recording digitized recognition information to the recognition information recording area,
• the recognition information recording means modulating either the “1” or “0” to a signal having a constant frequency and modulating the other to a non-signal state, and writing the signals corresponding to the constant frequency and the non-signal state to the recognition information recording area.

A recording disc which has a recognition information recording area for recording recognition information, at least the recognition information recording area being capable of additionally having information recorded thereto, the recognition information recording area having digitized recognition information recorded therein,

• wherein, of the digitized recognition information recorded in the recognition information recording area, the “1” is modulated to a signal having a first frequency and the “0” is modulated to a signal having a second frequency, and the signals corresponding to their respective frequencies are written to the recognition information recording area.

A recording disc which has a recognition information recording area for recording recognition information, at least the recognition information recording area being capable of additionally having information recorded thereto, the recognition information recording area having digitized recognition information recorded therein,

• wherein, of the digitized recognition information recorded in the recognition information recording area, either the “1” or “0” is modulated to a signal having a constant frequency and the other is modulated to a non-signal state, and the signals corresponding to the constant frequency and the non-signal state are written to the recognition information recording area.