A video tape player monitors the selection habits of a viewer selecting from a plurality of video tapes. Each video tape contains a plurality of programs. A first type of video tape has a title information symbol contained in a predetermined interval of the tape, e.g. the vertical blanking interval,...http://www.google.ca/patents/US5488409?utm_source=gb-gplus-sharePatent US5488409 - Apparatus and method for tracking the playing of VCR programs
