The present invention relates generally to processing video signals. One claim recites a system for processing a video signal. The system includes: an analyzer comprising an electronic processor programmed for analyzing a video signal to derive or calculate identifying data from data representing picture elements of the video signal or from data representing audible audio portions accompanying the video signal; a communications module to communicate the identifying data to electronic memory or to a remote repository to obtain advertizing information therefrom; and a controller comprising an electronic processor programmed for controlling rendering of the advertizing information in a manner such that the advertizing information is synchronized with at least a portion of the video signal when rendered. Of course, other combinations and claims are provided too.