Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry
Patent
1984-01-04
1988-06-28
Coles, Sr., Edward L.
Facsimile and static presentation processing
Facsimile
Specific signal processing circuitry
358140, H04N 514
Patent
active
047543310
ABSTRACT:
An analog video signal obtained from a television camera having a 4:3 aspect ratio is converted into a square array of N.times.N square pixels corresponding to the pixel content in the center of the television camera by apparatus which includes an analog-to-digital converter having as its analog input the analog output signal of the television camera and providing a sampled digital data output, the converter having an encode input and a data-ready output in addition to its analog video input and digital data output; a synchronization recovery circuit coupled to the video input and adapted to extract from the composite signal a composite synchronization signal containing line synchronization information, frame synchronization information and field index information, and an interface circuit coupled to the encode input of the analog-to-digital converter and the data-ready output and receiving the data output of the converter for converting the 4:3 aspect ratio of the television camera into a square image corresponding to a square in the center of the screen containing a square array of N by N square pixels.
REFERENCES:
patent: 4125862 (1978-11-01), Catano
patent: 4134128 (1979-01-01), Hurst
patent: 4148870 (1979-04-01), Taylor
patent: 4218710 (1980-08-01), Kashigi et al.
patent: 4245252 (1981-01-01), Nagumo
patent: 4393402 (1983-07-01), Keyes et al.
patent: 4476493 (1984-10-01), Poetsch et al.
patent: 4539593 (1985-09-01), Jutier et al.
Goncalo Steven R.
Wojcik David R.
Coles Sr. Edward L.
Harvey David E.
Litton Systems Inc.
Rotella Robert F.
Wallach Michael H.
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