Patent ID: 7415572
Filing Date: 2008-08-19
Classification: G06F,G11B,H04N

Abstract:
1. A file system comprising: a recording device configured to divide data into data units, each data unit corresponding to a predetermined time interval, and to record the data units at a series of blocks in a recording apparatus so as to form a file; a first determining device configured to determine whether the data can be recorded while ensuring a realtime performance based on a recording schedule of other data before the recording device performs a data recording process; and a managing device which records a data recording unit time and a maximum size of the recording unit data sizes as characteristics of a file and which collectively manages the files of two different types in a management information format, wherein the recording device performs the data recording process in accordance with the determination made by the first determining device, wherein a cluster consisting of a predetermined number of sequential blocks is regarded as a basic recording unit and wherein the recording device records realtime data in the recording apparatus by using at least one series of clusters as a recording unit, wherein the recording device records a file configuration of a data file that does not require a realtime performance by using addresses of the series of clusters, and wherein the recording device records a file configuration of a data file that requires a realtime performance by using pairs of a top cluster address of the series of clusters and a recording unit data size.