A system for identification of video content in a video signal is provided by providing a difference signal between an input signal and the delayed input signal. An alternative embodiment includes providing frequency coefficients from one or more video frames along a curve, or from a region of the video frame. In another embodiment a filter bank provides a real time or near real time frequency analysis of a video signal to provide identification. Other attributes of the video signal or transport stream may be combined with closed caption data or closed caption text for identification purposes. Example attributes include DVS/SAP information, time code information, histograms, and or rendered video or pictures.