| 摘要 |
A moving image data compressor/decompressor is provided that compresses moving image data with high compressibility and high image quality maintained. The image data extractor 8 extracts image data on a partial area with large motion in a frame. The first data compressor 10 compresses the image data on the partial area. The image reducer 12 reduces the size of the frame. The second data compressor compresses the data concerning the size-reduced frame. The compressed data output unit 16 holds data groups sequentially into the hard disk 208, together with positional information on a partial area. Each of the data groups is formed of frame data compressed by the second data compressor 14 and image data on a partial area compressed by the first data compressor 10, for each frame forming a moving image.
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