Patent ID: 7917005

Claim:
An information recording device for reserving a continuous recording area on an information recording medium and sequentially recording data on the reserved continuous recording area, comprising: an extraction section which extracts an unused area from the information recording medium; a first calculation section which calculates, for the unused area extracted by the extraction section, a minimum division criteria value which corresponds to a lower limit of the continuous recording area which allows continuous reproduction of a video and audio stream; a second calculation section which calculates a division criteria value by adding a predetermined margin to the minimum division criteria value; a determination section which determines, for the unused area extracted by the extraction section, whether the unused area exceeds the division criteria value being larger than the lower limit of the continuous recording area; a dividing section which divides the unused area which is determined to have a size exceeding the division criteria value by the determination section by the division criteria value; and a management section which reserves a divisional area which is defined by the dividing section and has the size of the division criteria value as the continuous recording area.