Patent ID: 6608938
Filing Date: 2003-08-19
Classification: H04N

Abstract:
An image data expansion apparatus, which inputs and expands compressed image data outputted from an image data compression apparatus having compression processing means for compression-processing input image data, image change detection means for detecting a change on image based on said input image data, frame rate control means for controlling a frame rate of outputted compressed image data obtained by compression-processing image data, means for controlling the frame rate of outputted compressed image data such that the frame rate is lower in a scene where the image change is small than the frame rate in a scene where the image change is large, in accordance with the situation of the change on image detected by said image change detection means, and synthesizing means for synthesizing information on the frame rate of the compressed image data, controlled by said frame rate control means, wherein the information on the frame rate is added to the compressed image data and the image data is outputted, said image data expansion apparatus comprising:decoding means for decoding compressed image data at a frame rate controlled to be lower in a scene where the change is small, than that in a scene where the change is large; expansion means for expanding the compressed image data decoded by said decoding means, wherein said input image data being reproduced such that the frame rate is lower in a scene where the change between images is small than the frame rate in a scene where the change between images is large; and image interpolation means for generating an interpolation image from said input predetermined compressed image data, in accordance with the information on the frame rate outputted with said compression image data, wherein said reproduced input image data is interpolated with an interpolation image generated by interpolation processing by said image interpolation means, and the interpolated image data is outputted.