| US 7,512,324 B2 | ||
| Data recording apparatus, reproduction apparatus, recording/reproduction method, and imaging apparatus | ||
| Masaru Takahashi, Yokohama (Japan); Yasuo Mutsuro, Yokohama (Japan); and Keisuke Inata, Yokohama (Japan) | ||
| Assigned to Hitachi, Ltd., Tokyo (Japan) | ||
| Filed on May 15, 2002, as Appl. No. 10/150,241. | ||
| Claims priority of application No. 2002-004051 (JP), filed on Jan. 11, 2002. | ||
| Prior Publication US 2003/0133542 A1, Jul. 17, 2003 | ||
| Int. Cl. H04N 7/26 (2006.01) | ||
| U.S. Cl. 386—112 [386/111; 386/27; 386/33] | 20 Claims |
| 1. A data recording apparatus, for recording input data to a recording medium after compressing, comprising:
a data compressor which compresses said input data into compressed data;
a data recorder which records the compressed data to said recording medium intermittently;
a single memory having both a first data region which temporarily stores first data usable in a compression process and a
second data region which temporarily stores second data to be recorded to said recording medium, wherein the second data is
the compressed data;
a memory controller which allocates portions of the single memory for the first and second data regions, wherein the sizes
of both the first and second data regions are adaptable such that when one of the first data region or the second data region
decreases in size, the other data region increases in size;
wherein the data recorder intermittently reads the compressed data from the second data region for recording the compressed
data to said recording medium intermittently;
wherein said data compressor includes a standard compression mode for performing the compression process using a plurality
of intermediate data to compress input data, and a simple compression mode for performing the compression process using part
of the plurality of intermediate data; and
in the case where said data compressor is operating in said standard compression mode and recording of the compressed data
to said recording medium is impossible, the mode of said data compressor is switched to said simple compression mode, the
first data region decreases in size, and the second data region increases in size.
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