Abstract: A system and a method for providing an additional audio content at the input of the car radio (or other radio receiver) by tracking the available channels. The invention provides an invasive and non-invasive way of adding dominant audio content source to the existing car audio systems.

Abstract: A system and a method for providing an additional audio content at the input of the car radio (or other radio receiver) by tracking the available channels. The invention provides an invasive and non-invasive way of adding dominant audio content source to the existing car audio systems.

Abstract: An enhanced scrambled video signal, method for making an enhanced scrambled video signal and apparatus for enhanced scrambling of a video signal are all characterized by a pattern added to a video signal. The pattern is formed from a pair of segments, including a black segment and a white segment which forms a high contrast transition therebetween. The transitions vary in horizontal location from one horizontal line to the next. The pattern causes an unauthorized television receiver to mistakenly lock onto the transitions in the pattern, as if the transitions represented horizontal sync signals, thus scrambling the video display. The apparatus for inserting the pattern may be formed by a sync detector, a video amplifier, a multiplexor and a control logic device. The video amplifier sets the video signal to a DC reference level. The sync detector detects the horizontal sync of the video signal which is sent from the video amplifier.

Abstract: A method and apparatus for securing a television transmission signal from unauthorized reception is disclosed that employs a sideband interdiction technique. A portion of the signal's sideband content is enhanced such that the signal is rendered useless for reception. The signal is decoded by passing the signal through a passive all-pass delay-equalizer network at the site of the receiver.