| 摘要 |
<p>A time-varying image coding device for coding time-varying image signals and a time-varying decoding device for decoding time-varying image signals. The image signals of high resolution are thinned by means of a spatial filtering with a given resolution in such a way that the aspect ratio is different, so as to generate image signals of low resolution. Predicted image signals of image signals of high resolution are generated by means of a spatial filtering with a given resolution so that the aspect ratio of the signals generated by decoding decoded signals of the image signals of low resolution is equal to the original one. The image signals of high resolution are coded by use of the predicted image signals thus generated. The time-varying image decoding device generates predicted image signals of image signals of high resolution by means of a spatial filtering with a given resolution in such a way that the aspect ratio of the decoded signals obtained by decoding the coded signals of image signals of low resolution is equal to the original one, and generates the image signal of high resolution by predictively decoding the coded signals by use of the predicted image signals thus generated.</p> |
