Facsimile and static presentation processing – Facsimile – Recording apparatus
Patent
1985-10-02
1987-08-18
Britton, Howard W.
Facsimile and static presentation processing
Facsimile
Recording apparatus
358260, 358288, H04N 1415
Patent
active
046881000
ABSTRACT:
An encoding apparatus of the invention includes a multiplexer for converting serial input video data into 8-bit parallel video data, a counter for counting a run length of the serial input video data so as to generate its count as 6-bit parallel data, a detection circuit for detecting a variability point of the input video data, a mode control circuit for selecting the parallel output from the multiplexer or the counter in accordance with the content of the input video data, and a shift register for storing the parallel output selected by the mode control circuit. Meanwhile, a decoding apparatus of the invention includes a mode determination circuit for determining the content of the code data representing the video data or run length data, and counters for counting code data representing the video data or the run length data, respectively. The code data includes mode data representing the content thereof, and the mode determination circuit determines the content of the code data in accordance with the mode data.
REFERENCES:
patent: 2909601 (1959-10-01), Fleckenstein
patent: 3394352 (1968-07-01), Wernikoff
patent: 3483317 (1969-12-01), De Groat
patent: 4366505 (1982-12-01), Tsuda et al.
patent: 4543611 (1985-09-01), Kurahayashi
Haganuma Tomoyuki
Kaneko Yoji
Britton Howard W.
Canon Kabushiki Kaisha
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