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    • 70. 发明申请
    • INFORMATION RECORDING MEDIUM ACCESS DEVICE, AND DATA RECORDING METHOD
    • 信息记录介质访问设备和数据记录方法
    • US20090180209A1
    • 2009-07-16
    • US12067671
    • 2006-09-12
    • Takuji MaedaShinji Inoue
    • Takuji MaedaShinji Inoue
    • G11B5/09
    • G11B27/329G06F3/0613G06F3/0643G06F3/0679G06F12/0246G06F2212/7203G11B20/1217G11B2020/10944G11B2020/1265G11B2020/1292G11B2220/60H04N5/907
    • When moving image data or the like is recorded into an information recording medium, such as a flash memory, in real time, an influence of locations of free recording areas upon the recording speed is suppressed to ensure the real time performance of the data recording. In an access apparatus, there is provided an area management block control part that manages FAT1 and FAT2, which are area management information of a nonvolatile memory, on a FAT block-by-FAT block basis, and the length of the free recording area in each FAT block is calculated. Then, area management block information, in which the free recording area length in each FAT block is recorded, is generated on a RAM. A FAT block in which the free recording area length exceeds a threshold value is assigned to the data recording, thereby suppressing the number of updates of the area management information regardless of the location of the free areas. In this way, the buffer overflow can be prevented from occurring due to a high frequency of the updating of the area management information, thereby ensuring the real time performance during the data recording.
    • 当运动图像数据等被实时地记录到诸如闪存的信息记录介质中时,可以抑制空闲记录区域的位置对记录速度的影响,以确保数据记录的实时性能。 在访问装置中,提供了一个区域管理块控制部分,其以基于FAT块的FAT块为基础来管理作为非易失性存储器的区域管理信息的FAT1和FAT2,以及自由记录区域的长度 计算每个FAT块。 然后,在RAM上生成记录了各FAT块的空闲记录区域长度的区域管理块信息。 将空闲记录区域长度超过阈值的FAT块分配给数据记录,从而抑制区域管理信息的更新次数,而与自由区域的位置无关。 以这种方式,可以防止由于区域管理信息的更新的高频率而发生缓冲器溢出,从而确保数据记录期间的实时性能。