Patent ID: 7502296

Claim:
An information recording medium comprising: a user data area which has a first predetermined capacity and in which user data is recorded; and a control information area which has a second predetermined capacity and in which control information data for controlling reproduction of the user data recorded in the user data area is recorded, wherein the control information area includes a predetermined remaining quantity area in which, after the control information data recorded in the control information area becomes larger than a first predetermined fixed amount, the control information data is recorded, wherein the control information data is recorded in the control information area regardless of a data amount of the user data additionally recorded in the user data area until the control information data recorded in the control information area becomes larger than the first predetermined fixed amount, and wherein the control information data is recorded in the control information area only when the data amount of the user data additionally recorded in the user data area is larger than a second predetermined fixed amount after the control information data recorded in the control information area becomes larger than the first predetermined fixed amount.