9 Computer programs for embedding and detecting information in electronic signals, namely, digital data streams, and audio, video, audiovisual, and multimedia signals; Encoders for embedding and transporting auxiliary data and information streams in digital data streams, and audio, video, audiovisual, and multimedia signals; Decoders for recovering auxiliary data and information streams from digital data streams, and audio, video, audiovisual, and multimedia signals; Computer programs for use in the field of media for measuring audience size and ratings, for generating interactive television, for providing targeted advertising, for measuring public opinion, for media exposure measurement, for media market research, for generating market surveys, for media business research, for measuring media demographics, geographics, and psychographics, for measuring consumer behavior and consumer trends, and for related data collection, processing, and analysis for the foregoing; Computer programs for use in the media and entertainment industry for the purposes of aggregating and measuring viewership data and enabling targeted advertising, content personalization and interactive television features; Computer software and hardware for use in encoding, decoding, reading, and analyzing broadcast, television, video and audio signals, audio and video coding, content identification and analysis, and signal source identification and analysis; Computer software for data aggregation and management, namely, collecting, normalizing, indexing, enhancing, searching, monitoring, organizing, and analyzing data; Computer software for recognizing media content using digital watermarks