| 摘要 |
In a data-compression of a moving picture employing MPEG system, the quantization step used for quantizing coefficients of frequency components obtained in DCT (discrete cosine transform), is determined on a first frame of the moving picture, and is used for all the frames of the moving picture. A frame is processed by first run of data-compression. Code volume is allotted for each block in accordance with data obtained by the first run of data-compression, and in second run of data-compression, Huffman coding is discontinued when generated code volume of a block becomes larger than the code volume allotted to the block. When generated code volume of a frame is smaller than the target code volume of a frame, the surplus target code volume is added to a target code volume of a succeeding frame.
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