Transmission of data with a video signal

Details Transmission of data with a video signal Transmission of data with a video signal

H - Electricity

04

N

350/34

H04N 7/00 (2006.01) H04N 7/084 (2006.01) H04N 7/171 (2006.01)

Patent

CA 1150821

TRANSMISSION OF DATA WITH A VIDEO SIGNAL Abstract of the Disclosure The horizontal line synchronizing pulses of a video signal are selectively replaced with a video signal blanking level in dependence upon bits of data, whereby the data is transmitted with the video signal. Such data transmission is particularly applicable to a pay TV system in which the video signal is scrambled, because the selective absence of horizontal line synchronizing pulses enhances the video signal scrambling. In this case the data can comprise information relating to the scrambling of the video signal.

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