File reproducing apparatus and file reproducing method
First Claim
1. A file reproducing apparatus for reproducing files recorded on a recording medium using a FAT file system, the files to be reproduced including motion picture data, said file reproducing apparatus comprising:
- a reading section that reads the motion picture data of a file from the recording medium;
a reproduction processor that applies a predetermined reproduction process to the motion picture data read by said reading section;
a data storage device; and
a controller configured to;
control said reading section, said reproduction processor, and said data storage device; and
generate a cluster table on said data storage device when the motion picture data is reproduced in a forward direction or when a cluster is retrieved for reading a header of a file including motion picture data, wherein;
the cluster table associates an offset position, indicating a position relative to a head of a file and being set at a predetermined offset interval, with a cluster number indicating a location on the recording medium on which the motion picture data at the corresponding offset position is stored;
said data storage device stores the cluster table; and
said controller determines a location on the recording medium at which the motion picture data to be read by said reading section is located with reference to the cluster table during a reproducing operation in a reverse direction which proceeds from an end of the file toward the head thereof.
1 Assignment
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Accused Products
Abstract
A file reproducing apparatus for reproducing files recorded on a recording medium by using a FAT (File Allocation Table) file system, which includes a cluster table which associates offset positions indicating the distances from the head of the file set at the predetermined offset intervals with cluster numbers indicating locations of the files recorded on the recording medium in which the data at the corresponding offset positions are stored. During a reproduction operation in a reverse direction which proceeds from the end of the file toward the head, the location of the data to be read is determined with reference to the cluster table.
8 Citations
14 Claims
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1. A file reproducing apparatus for reproducing files recorded on a recording medium using a FAT file system, the files to be reproduced including motion picture data, said file reproducing apparatus comprising:
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a reading section that reads the motion picture data of a file from the recording medium; a reproduction processor that applies a predetermined reproduction process to the motion picture data read by said reading section; a data storage device; and a controller configured to; control said reading section, said reproduction processor, and said data storage device; and generate a cluster table on said data storage device when the motion picture data is reproduced in a forward direction or when a cluster is retrieved for reading a header of a file including motion picture data, wherein; the cluster table associates an offset position, indicating a position relative to a head of a file and being set at a predetermined offset interval, with a cluster number indicating a location on the recording medium on which the motion picture data at the corresponding offset position is stored; said data storage device stores the cluster table; and said controller determines a location on the recording medium at which the motion picture data to be read by said reading section is located with reference to the cluster table during a reproducing operation in a reverse direction which proceeds from an end of the file toward the head thereof. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A file reproducing method for reproducing files recorded on a recording medium using a FAT file system, the files to be reproduced including motion picture data, said file reproducing method comprising:
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generating a cluster table when the motion picture data is reproduced in a forward direction or when a cluster is retrieved for reading a header of a file including motion picture data, the cluster table associating an offset position, indicating a position relative to a head of a file and being set at a predetermined offset interval with a cluster number indicating a location on the recording medium on which the motion picture data at the corresponding offset position is stored; and determining a location on the recording medium at which the motion picture data to be read is located with reference to the cluster table during a reproducing operation in a reverse direction which proceeds from an end of the file toward the head thereof. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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Specification