Multimedia data recording apparatus, monitor system, and multimedia data recording method
First Claim
1. A multimedia data recording apparatus comprising:
- a layer classification section that classifies multimedia data into a plurality of hierarchical layers according to data contents or data precision;
a recording section that continuously records data classified into said layers in memory; and
a data amount reduction section that, when vacant capacity of said memory is at or below a threshold value, performs deletion in order starting with data classified into a lower layer of said hierarchical layers among data recorded in said memory.
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Accused Products
Abstract
A multimedia data recording apparatus is disclosed that enables large-volume recorded data to be recorded for a long period in accordance with the importance of the data, by means of a simple configuration and simple processing, and without imposing a heavy load on the system. In this apparatus, a layer classification section classifies video data captured by a surveillance camera and input via a video processing section into a plurality of layers on a frame-by-frame basis according to importance. A data recording section assigns a file to each layer and records classified data in a data recording medium. If an information amount reduction section detects that the vacant capacity of the data recording medium has reached or fallen below a threshold value, it deletes a frame belonging to the lowest layer among the plurality of layers.
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Citations
11 Claims
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1. A multimedia data recording apparatus comprising:
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a layer classification section that classifies multimedia data into a plurality of hierarchical layers according to data contents or data precision;
a recording section that continuously records data classified into said layers in memory; and
a data amount reduction section that, when vacant capacity of said memory is at or below a threshold value, performs deletion in order starting with data classified into a lower layer of said hierarchical layers among data recorded in said memory. - View Dependent Claims (3, 5, 6, 7, 8, 9, 10)
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2. (canceled)
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4. (canceled)
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11. A multimedia data recording method comprising:
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a layer classifying step of classifying multimedia data into a plurality of hierarchical layers according to data contents or data precision;
a recording step of continuously recording data classified into said layers in memory; and
a data amount reducing step of, when vacant capacity of said memory is at or below a threshold value, taking older data or less important data among data recorded in said memory as its object, and reducing a data amount of these data.
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Specification