Color facsimile device with data recompressing capability

Details Color facsimile device with data recompressing capability Color facsimile device with data recompressing capability

2008-05-13

2008-05-13

Haskins, Twyler Lamb (Department: 2625)

Facsimile and static presentation processing

Facsimile

Reduced time or bandwidth for static image communication

C358S426020, C358S426030, C358S426140, C358S426010, C382S239000, C382S251000

Reexamination Certificate

active

07372600

ABSTRACT:
JPEG data is efficiently recompressed and transmitted to a remote color facsimile device. Before transmission of recompressed JPEG data, an anticipated transmission time is displayed for enabling the user to easily select the desired compression ratio. To generate recompressed JPEG, a Huffman decoder is provided for decoding encoded data and temporarily generates decoded data. Table generator multiplies the predefined quantization table values by the prescribed value to generate the modified quantization table. Intermediate data generator generates the intermediate data by dividing the encoded data by ratio n, which is derived by dividing predefined quantization table by the modified quantization table. Huffman encoder encodes the intermediate data to create new encoded data. Recompressed JPEG data includes the newly coded data and the modified quantization table.

REFERENCES:
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patent: A2000-278349 (2000-10-01), None
patent: A 2001-61068 (2001-03-01), None

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