In a third operation, the modulation degree of that path is reduced.

To put it simply, the modulation index expresses the amount of modulation experienced by the carrier.

At least a user area of the ROM area has a modulation degree of 10 to 37% and more preferably, the phase pit of the user area has a modulation degree of 15 to 25%.

Furthermore, the method modulates DCI format to a first modulation degree when demodulating the DCI format, and can demodulate the DCI format to a second modulation degree when the DCI format is not detected.

There is provided a response device of a communication system capable of performing stable communication by increasing the modulation degree.

Thus, it is possible to obtain a circuit having a frequency modulation degree expressed as a function of Kv.

The optical information recording medium is excellent in recording/reproducing characteristics (particularly in sensitivity and modulation degree).

The beam shaper employs nesting lenslets that are articulated so that the degree of beam shaping modulation is continuously adjustable across a range of modulation.

In a first operation, the transmission power of that path is raised, and in a second operation, the modulation degree of that path is reduced.

Provided is an optical information medium measuring method wherein the modulation degree of an optical information medium which has a multilayer structure having a plurality of information layers is measured.