CODING METHOD FOR MOTION-IMAGE DATA, DECODING METHOD, TERMINAL EQUIPMENT EXECUTING THESE, AND TWO-WAY INTERACTIVE SYSTEM
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Abstract
This invention relates to a coding method for motion-image data and others effective in a special interactive environment for transmitting motion-image data with information concentrated on only a partial region of a display image as in a two-way interactive system implementing real-time two-way interaction. The coding method involves dividing an image frame forming motion-image data into a plurality of rectangular regions, and grouping each of these rectangular regions into a preset ROI and a non-ROI. These rectangular regions are sequentially compressed so that a code length of a rectangular region grouped into the ROI is larger than a code length of a rectangular region grouped into the non-ROI, thereby generating coded data of each image frame.
37 Citations
34 Claims
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1-22. -22. (canceled)
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23. A coding method for motion-image data in which each of image frames, arranged along a time axis so as to constitute motion-image data, is sequentially and individually compressed along a time axis, the coding method comprising the steps of:
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setting a virtual image frame comprised of a plurality of sub-regions, as an image frame to be coded; allocating one selected from at least one of a plurality of sub-images obtained by dividing an image frame to be coded out of the image frames constituting the motion-image data, and a clipped image obtained from another information source different from the motion-image data, to each of the plurality of sub-regions constituting the virtual image frame; and individually compressing each of the images allocated to the plurality of sub-regions constituting the virtual image frame, according to a coding level set for each of the plurality of sub-regions, thereby generating coded data of each virtual image frame including plural types of image information. - View Dependent Claims (24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34)
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Specification