| 摘要 |
Content data is classified into a data block group of high priority and an other data block group of low priority related to a user's operation. When the content data is read from a storage unit to store it in a buffer memory, a preferential data block group is firstly and selectively read to store it in the buffer memory, and then, a non-preferential data block group is read to store it in the buffer memory. In a state where free areas are present in the buffer memory, the read data blocks are stored in the free areas. When the buffer memory runs out of all free areas therein, the read data blocks are overwritten on non-preferential data blocks.
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