Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry
Patent
1991-05-30
1994-01-11
Groody, James J.
Facsimile and static presentation processing
Facsimile
Specific signal processing circuitry
358133, H04N 704
Patent
active
052786480
ABSTRACT:
A compound time-multiplexed video transmission processing system transmitting and receiving a signal corresponding to luminance signal for driving a video display includes a transmit processor for processing a received luminance signal to produce a time-multiplexed mixed field signal based on a high frequency signal corresponding to a high frequency portion of the input luminance signal received during a previous field and a half bandwidth signal received during a current field, and a receive processor for processing the mixed field signal to produce an output luminance signal based on the high frequency portion and the half bandwidth signal. The transmit processor includes circuitry for storing the high frequency portion of the input luminance signal from the previous field. The system produces an artifact in the mixed field signal, which is evenly distributed in the output luminance signal in a predetermined processing sequence. A method for processing luminance signals is also disclosed.
REFERENCES:
patent: 4839720 (1989-06-01), Isnardi
patent: 4967272 (1990-10-01), Kao et al.
patent: 5012326 (1991-04-01), Sakamoto et al.
patent: 5025309 (1991-06-01), Isnardi
Burgess Glenton B.
Comsat
Groody James J.
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