Facsimile and static presentation processing – Facsimile – Recording apparatus
Patent
1985-07-01
1987-06-30
Britton, Howard W.
Facsimile and static presentation processing
Facsimile
Recording apparatus
358256, 358280, H04N 132, H04N 141
Patent
active
046774920
ABSTRACT:
Facsimile data signal trains are transmitted from an originating station of Group 2 or Group 3 to a destination station Group 2 or Group 3 by way of an intermediate station. The scan line frequency of the facsimile data signal trains of the second group thereby amounts to n lines/second and m picture elements/line of the originals scanned whose information content is to be transmitted by facsimile data signal trains of Group 3. In the intermediate station, data signal trains of Group 2 are converted into data signal trains of Group 3 before intermediate storage and are subsequently intermediately stored, whereas data signal trains of Group 3 are intermediately stored without conversion. The data signal trains of Group 2 received in the intermediate station are converted into data signal trains of Group 3 before they are intermediately stored by demodulation, scanning with a frequency T2=m.times.n Hertz and coding of the samples according to a redundancy-reducing source code method.
REFERENCES:
patent: 4454575 (1984-06-01), Bushaw
patent: 4491873 (1985-01-01), Takayama
Britton Howard W.
Siemens Aktiengesellschaft
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