Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry
Patent
1992-03-25
1993-11-16
Kostak, Victor R.
Facsimile and static presentation processing
Facsimile
Specific signal processing circuitry
358 56, H04N 712
Patent
active
052628558
ABSTRACT:
A method and apparatus for encoding a sequence of digital motion video images at more than one resolution. In a first embodiment, it is determined whether an image selected from the sequence is part of either a dissolve, a fade, a fast motion region or a complex motion region. If the selected image is part of either a dissolve, a fade, a fast motion region or a complex motion region, then the selected image is encoded at a reduced resolution level. In a further embodiment, a selected image is provided for encoding. A determination is then made whether a parameter derived from an estimate of the available decoding time is above a predetermined threshold. If the parameter is above the predetermined threshold, then the selected image is encoded at a reduced resolution. In a still further embodiment, a selected image from a sub-sequence of images is provided for encoding. A determination is then made whether the quantization step size associated with the image is greater than a predetermined threshold. If the quantization step size is greater than the predetermined threshold, then the image is encoded at a reduced resolution. The image is partially encoded if it is within the first N minus one images provided from the sub-sequence, otherwise the image is fully encoded.
REFERENCES:
patent: 4718104 (1988-01-01), Anderson
patent: 4802003 (1989-01-01), Takei et al.
patent: 5048111 (1991-09-01), Jones et al.
patent: 5150209 (1992-09-01), Baker et al.
Alattar Adnan M.
Golin Stuart J.
Keith Michael
Golub Daninel H.
Intel Corporation
Kostak Victor R.
Murray William H.
Silverman Carl L.
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