Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry
Patent
1987-02-03
1989-07-11
Groody, James J.
Facsimile and static presentation processing
Facsimile
Specific signal processing circuitry
358298, 358443, H04N 140
Patent
active
048476951
ABSTRACT:
An image processing apparatus includes a D/A converter for generating an analog image signal, a variable resistor for changing an output range of the analog image signal generated by the D/A converter, and a comparator for processing the analog image signal generated by the variable resistor by using an analog pattern signal and for outputting a pulse width modulated signal. The analog pattern signal may be a triangular wave signal, a saw-tooth wave signal, a sine wave signal, or a trapezoidal wave signal. In another version, selection is performed between predetermined data and a generated image signal and the selected signal is processed using an analog pattern signal (e.g., a triangle wave) to output a pulse width modulated signal. A D/A converter may be used to convert the output of the selection. The output range of the DAC may be variable.
REFERENCES:
patent: 3463880 (1969-08-01), Corson
patent: 3646262 (1972-02-01), Moe
patent: 4149183 (1979-04-01), Pellar et al.
patent: 4763199 (1988-08-01), Suzuki
patent: 4782398 (1988-11-01), Mita
patent: 4800442 (1989-01-01), Riseman et al.
Canon Kabushiki Kaisha
Groody James J.
Svihla Randall S.
LandOfFree
Image processing apparatus in which the minimum and maximum widt does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Image processing apparatus in which the minimum and maximum widt, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Image processing apparatus in which the minimum and maximum widt will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-440875