A apparatus and apparatus for compensating for video
insertion loss due to transmission over long
twisted pair cable lines is presented. Transmission of video over
twisted pair cable is advantageous because of its superior cost
advantage over
coaxial cable. However,
twisted pair cables have significant loss characteristics at the higher frequencies (i.e.,
broadband) compared to coaxial cables. At a
transmitter station, the video
signal is amplified in the
high frequency region for possible
skin effect losses thereby brute forcing the
high frequency components to the receiving
station. At the
receiver station, the video
signal is further compensated for
diffusion line and
skin effect losses. The total
skin effect compensation applied in both the
transmitter and
receiver stations is such that the square root of frequency characteristics of
skin effect losses is compensated for. Thus, at the receiving station, the
high frequency compensation added at the
transmitter to
brute force the high frequency components to the receiving station may be removed if found excessive. Additionally, compensation is included to adjust for
skew that may occur because of irregularities between the various twisted pairs used to transmit the individual video components. Non-
minimum phase type filters are used to inject
delay into the faster arriving signals so that they may coincide in phase with later arriving signals resulting in a true
reproduction of the video.