| 摘要 |
In an apparatus for encoding a video signal having correlation between picture frames, there is provided a coding device for encoding the video signal by sequentially using a plurality of quantizers having quantization characteristics different from one another for every picture frame. When regions of values indicated by a plurality of encoded codes corresponding to an identical picture element in a plurality of picture frame adjacent to one another in time overlap with one another, there is also provided a decoding device having a value in the overlapped region as a decoded value. It becomes thereby possible to provide high picture quality for transmitted signals and to reduce a transmission data rate.
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