To preliminarily calculate the total capacity of streams from program-related information such as an EPG (electronic program guide) at recording start and to secure a physically continuous recording area for this period of time beforehand so that speed decrease due to the operation of a filesystem is avoided.

The total capacity of the steams is preliminarily calculated from the program related information such as the EPG at recording start, and the continuous recording area for a period of time corresponding to the total capacity is secured. A fixed continuous area for video recording is determined on a HDD at the time of starting video recording storage of the video stream. Thus, a speed drop due to the operation of a normal filesystem is prevented because the filesystem does not have to search for a free area for every actual video recording that is later carried out.