Picture data communication system with scanning pattern change

Details Picture data communication system with scanning pattern change Picture data communication system with scanning pattern change

1986-12-16

1988-06-28

Coles, Sr., Edward L.

Facsimile and static presentation processing

Facsimile

Recording apparatus

358280, 340347DD, H04N 1413

Patent

active

047543361

ABSTRACT:
A picture data communication system with a scanning pattern change includes a plurality of scanning pattern selecting units responsive to input picture signals for selecting a type of scanning pattern, a plurality of difference encoding and quantizing units responsive to the outputs of the scanning pattern selecting units for encoding and quantizing differences between data in adjacent frames in a sequence of frames for pixels and quantizing the encoded difference data. The system also includes a plurality of subsequent encoding units responsive to the outputs of the difference encoding and quantizing units for encoding the quantized encoded difference data and encoding and run length data representing the length of a sequence of the same pixel information, a comparison unit for comparing amounts of information between the outputs of the plurality of subsequent encoding units for determining the output of the minimum amount of information, a selection unit responsive to the outputs of the subsequent encoding units and the comparison unit for selecting the output of the minimum amount of information, and an identification unit responsive to the output of the selection unit for inserting a discrimination code to the selected output of the minimum amount of information.

REFERENCES:
patent: 4542413 (1985-09-01), Rallapalli et al.
patent: 4673987 (1987-06-01), Toyokawa
patent: 4706265 (1987-11-01), Furukawa

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