Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry
Patent
1991-05-23
1992-07-28
Kostak, Victor R.
Facsimile and static presentation processing
Facsimile
Specific signal processing circuitry
358105, 358135, H04N 713
Patent
active
051344785
ABSTRACT:
In a method of encoding a sequence of frames of a full color digital motion video signal, the initial frame of the sequence is selected for encoding at multiple levels of resolution. The initial frame becomes a previous target image and a previous reconstructed image is formed by storing a reconstructed image. After processing the initial frame, each subsequent frame of the sequence of frames is then selected as the target image. Displacement vectors, representing the magnitude and displacement between regions in the target image being processed and corresponding regions in the previous target image are provided. Each displacement vector is applied to a corresponding region in the previous reconstructed image to form a predicted image. The displacement vectors are encoded using a binary tree technique with off-center splits. An error image, which is formed by subtracting pixel values in the predicted image from corresponding pixel values in the target image is encoded at multiple levels of resolution using a binary tree technique with off-center splits. A new previous target image is formed by storing the target image being processed in place of the previous target image. A new previous reconstructed image is formed by storing a new reconstructed image in place of the previous reconstructed image. The method is repeated for each of the remaining subsequent images in the sequence of frames. In one embodiment, frames are encoded and decoded in and out of display order sequence for subsequent displaying in the correct display order sequence.
REFERENCES:
patent: 4849810 (1989-07-01), Ericsson
patent: 4853779 (1989-08-01), Hammer
Golub Daniel H.
Intel Corporation
Kostak Victor R.
Murray William H.
Silverman Carl L.
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