Method for a compatible increase in resolution in color...

Details Method for a compatible increase in resolution in color... Method for a compatible increase in resolution in color...

H - Electricity

04

N

350/40, 350/56

H04N 5/38 (2006.01) H04N 11/24 (2006.01) H04N 5/44 (2006.01)

Patent

CA 1215167

ABSTRACT OF THE DISCLOSURE In the transmission of a television signal containing a luminance signal between a transmitting station and a receiving station of a television system, the picture resolution at the receiving station is compatibly increased by: effecting planar prefiltering of the luminance signal at the transmitting station and a corresponding planar postfiltering of the luminance signal at the receiving station; effecting offset sampling and offset modulation of the luminance signal at the transmitting station and a corresponding sampling conversion and demodulation of the lumi- nance signal at the receiving station; deriving an additional signal from the luminance signal for increasing picture resolu- tion, reducing the amplitude of the additional signal at the transmitting station and transmitting the additional signal together with the original luminance signal to the receiving station; and increasing the amplitude of the additional signal at the receiving station to an extent corresponding to the reduction performed at the transmitting station.

469547

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