Distributed intraframe transmission in digital video compression
First Claim
1. A method of intraframe transmission comprising:
- dividing a digital image into a plurality of regions;
selecting a first region wherein said first region is encoded without interframe compression; and
transmitting said regions.
2 Assignments
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Accused Products
Abstract
The present invention provides a method and apparatus for distributed intraframe transmission. In one embodiment of the present invention, digital images are divided into regions. In this embodiment, an I-frame is not transmitted all at once. Instead, in each transmission, a region of the image is compressed without using interframe compression while the rest of the image is compressed using interframe compression. The region transmitted without interframe compression changes with each transmission. Thus, over the course of several transmissions every region of the image is transmitted without interframe compression. A transmission schedule controls the transmission of I-frame data for an entire image over the course of several frame transmissions. In one embodiment, a digital image is divided into M regions, and one region is transmitted without using interframe compression in each frame. In one embodiment, the M regions are numbered from 0 to M−1, and a region is selected for transmission without using interframe compression when the region number is equal to MOD (F, M), where F is the frame number. In one embodiment, the regions are non-overlapping rectangular regions. In another embodiment, the regions are strips of pixels. In another embodiment, regions are non-contiguous pixels. In yet another embodiment, regions which will be transmitted without interframe compression comprise sets of pixels which have not been refreshed within M frames and pixels which are selected by a compressibility criteria.
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Citations
18 Claims
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1. A method of intraframe transmission comprising:
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dividing a digital image into a plurality of regions;
selecting a first region wherein said first region is encoded without interframe compression; and
transmitting said regions. - View Dependent Claims (2, 3, 4, 5, 6)
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7. An intraframe transmission unit comprising:
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a dividing unit configured to divide an I-frame into a plurality of regions;
a selection unit configured to select a first region wherein said first region is encoded without interframe compression; and
a transmitter configured to transmit said regions. - View Dependent Claims (8, 9, 10, 11, 12, 14, 15, 16, 17, 18)
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13. A computer program product comprising:
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a computer usable medium having computer readable program code embodied therein configured for intraframe transmission, comprising;
computer readable code configured to cause a computer to divide an I-frame into a plurality of regions;
computer readable code configured to cause a computer to select a first region wherein said first region is encoded without interframe compression; and
computer readable code configured to cause a computer to transmit said regions.
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Specification