File access apparatus
OwnerJunya Kakuinventor
Life of this patent
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Abstract
A file access apparatus (10) includes a CPU (36). The CPU (36) accesses an MPEG file under control of a multi-task OS. The MPEG file contains MPEG data on a plurality of frames forming a moving image and index information used for managing the MPEG data. The CPU (36) causes an index task to issue an index readout instruction for reading out the index information from the MPEG file, and causes a main task to issue a frame readout instruction for reading out the MPEG data from the MPEG file. The frame readout instruction is issued with reference to the index information read out in accordance with the index readout instruction. Access to the MPEG file in accordance with the thus issued index readout instruction or the frame readout instruction is executed by a BG task.
Claims18
A file access apparatus for making access to an image file in which image data on a plurality of screens forming a moving image and index information used for managing said image data on the plurality of screens are contained, under control of a CPU executing a plurality of tasks in parallel based on a multi-task OS, wherein
- said plurality of tasks include:
- a first instruction issue task of issuing a first readout instruction for reading out said index information from said image file;
- a second instruction issue task of issuing a second readout instruction for reading out the image data from said image file with reference to the index information read out in accordance with said first readout instruction;
- and
- an access task of making access to said image file in accordance with each of the first readout instruction issued by said first instruction issue task and the second readout instruction issued by said second instruction issue task.
Dependencies are inferred from the claim text.