SYSTEMS AND METHODS USING DIGITAL WATERMARKING AND IDENTIFIER EXTRACTION TO PROVIDE PROMOTIONAL OPPORTUNITIES

The present disclosure relates to processing media content (e.g., video or audio signals). One claim recites a method including: receiving first content comprising a video portion or an audio portion, the first content being received over a network from a user; utilizing a multi-purpose electronic processor programmed as a content identifier module, deriving identifying data from data representing picture portions of the video portion or from data representing audible portions of the audio portion of the first content; with reference to a computerized database or computerized repository, determining a first promotional opportunity associated with the identifying data, in which the first proportional opportunity comprises an opportunity to purchase second content, the second content being related to—but different than—the first content, and determining a second, different promotional opportunity associated with the identifying data if another instance of the identifying data is thereafter received; and providing information regarding the first promotional opportunity or the second, different promotional opportunity. Of course, other claims and combinations are provided too.