Digital television transmission using chrominance inversion

Details Digital television transmission using chrominance inversion Digital television transmission using chrominance inversion

H - Electricity

04

N

350/33

H04N 11/04 (2006.01)

Patent

CA 1161158

DIGITAL TELEVISION TRANSMISSION USING CHROMINANCE INVERSION Abstract of the Disclosure At a transmitter, an analog NTSC colour video signal is converted into a digital video signal and all of the signal components in the chrominance spectral band in alternate television frames are inverted. The resultant signal is transmitted via a low-speed digital signal transmission channel using interframe difference coding. At a receiver, the received digital signal is converted into an analog video signal and all of the signal components in the chrominance spectral band in the other alternate television frames are inverted. The resultant signal, having inverted chrominance, is reproduced on a conventional NTSC colour television receiver. Bandpass and comb filtering, preferably on the digital signals, are used at the transmitter and at the receiver to separate the luminance and chrominance signal components to enable inversion of the chrominance components. - i -

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