| 摘要 |
<p>PROBLEM TO BE SOLVED: To solve the problem in a conventional technique that image quality is remarkably degraded because the amount of special reproduction data is far smaller than the amount of usual reproduction data, and that it is difficult to retrieve a scene if an image update ratio is lowered for better image quality. SOLUTION: Image data of a specified program stored in an image memory 16 is converted in image size in an image size converting circuit 23, by using a filter coefficient from an image conversion filter setting device 22. An image TP data forming circuit 24 codes the input image data after image size conversion. Also, when the input image data is an interlace image, the circuit 24 outputs an image coding stream formed by synthesizing N (N being an integer not less than one) of a half-field I-picture, one-field P-picture and one-frame P-picture in time series. Further, the input image data is a progressive image, the circuit 24 outputs an image coding stream formed by synthesizing one-frame P-picture with N pieces of P-pictures in time series.</p> |
