Facsimile and static presentation processing – Facsimile – Auxiliary signal
Patent
1989-10-10
1992-03-10
Coles, Sr., Edward L.
Facsimile and static presentation processing
Facsimile
Auxiliary signal
382 56, H04N 140
Patent
active
050953745
ABSTRACT:
A method and apparatus featuring the compression and decompression of the video image data on a single application specific integrated circuit (ASIC) which utilizes typical Huffman coding techniques, but which defines a run count generally as a plurality of zeros between each pair of ones and which further uses a prediction window having substantially no directional biasing errors associated therewith. Additionally, the compression/decompression apparatus of this invention utilizes a reordering technique whereby all of the "high confidence" predictions are placed in one end of the buffer and all the "low confidence" predictions are placed in another end of the same buffer. This reordering, together with the unbiased window configuration and associated run length count definition, allows for high efficiency lossless compression and decompression of associated image data.
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Grosse Debora Y.
Klein Robert
Wilds Karen A.
Coles Sr. Edward L.
Grant Jerome
Unisys Corporation
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