Coding method for notion-image data, decoding method, terminal equipment executing these, and two-way interactive system
First Claim
1. A coding method for motion-image data in which each of image frames constituting motion-image data is sequentially compressed along a time axis, the method comprising the steps of:
- dividing an image frame to be coded among the image frames constituting the motion-image data, into a plurality of sub-regions;
grouping each of the plurality of sub-regions into either of a region of interest set in the image frame and a region of no interest different from the region of interest; and
compressing each of the plurality of sub-regions so that a code length of a sub-region grouped into the region of interest out of the plurality of sub-regions is larger than a code length of a sub-region grouped into the region of no interest, thereby generating coded data of each image frame.
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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.
89 Citations
34 Claims
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1. A coding method for motion-image data in which each of image frames constituting motion-image data is sequentially compressed along a time axis, the method comprising the steps of:
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dividing an image frame to be coded among the image frames constituting the motion-image data, into a plurality of sub-regions;
grouping each of the plurality of sub-regions into either of a region of interest set in the image frame and a region of no interest different from the region of interest; and
compressing each of the plurality of sub-regions so that a code length of a sub-region grouped into the region of interest out of the plurality of sub-regions is larger than a code length of a sub-region grouped into the region of no interest, thereby generating coded data of each image frame. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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23. A coding method for motion-image data in which each of image frames constituting motion-image data is sequentially 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