H - Electricity – 04 – N
Patent
H - Electricity
04
N
350/36
H04N 11/00 (2006.01) H04N 11/02 (2006.01)
Patent
CA 1202408
COLOR SLOW-SCAN TV SYSTEM AND METHOD Abstract of the Disclosure A color slow-scan TV system and method are disclosed for selecting U.S. standard NTSC TV color picture (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.
401391
Johnson Bruce F.
Mcclelland Larry R.
Southworth Glen R.
Colorado Video Incorporated
Macrae & Co.
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