Facsimile and static presentation processing – Static presentation processing – Attribute control
Patent
1981-04-21
1983-08-23
Murray, Richard
Facsimile and static presentation processing
Static presentation processing
Attribute control
358140, 358141, H04N 932
Patent
active
044007175
ABSTRACT:
A color slow-scan TV system and method are disclosed for selecting U.S. standard NTSC TV color pictures (or alternately other standards such as PAL or non-standard color TV) to be transmitted, transmitting the selected pictures utilizing slow-scan techniques, and reconstructing the pictures after transmission for display. The system includes a video compressor (transmitter) for receiving a composite video signal indicative of a color TV picture and providing therefrom a color slow-scan output signal indicative thereof, and a video expander (receiver) for receiving color slow-scan signals after transmission and providing therefrom a fast-scan output signal suitable for display of the color TV picture. The system and method include digitizing a selected video signal indicative of a TV color picture, writing the digitized information into a digital memory, reading out the memory through a digital-to-analog converter at a color slow-scan rate suitable for transmission on a transmission channel, receiving the transmitted color slow-scan signal and digitizing the received color slow-scan signal, writing the digitized color slow-scan information into a digital memory, and reading out the memory through a digital-to-analog converter at a fast-scan rate suitable for display on conventional color TV monitors using NTSC, PAL, or other standards.
REFERENCES:
patent: 4057836 (1977-11-01), Munsey
patent: 4210927 (1980-07-01), Yumde et al.
Johnson Bruce F.
McClelland Larry R.
Southworth Glen R.
Colorado Video Incorporated
Murray Richard
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