The present invention relates generally to processing audio and video data. One claim recites a method of accessing content stored in a remote database. The method includes: receiving video or audio data; decoding an auxiliary machine-readable code from the video or audio data; deriving a fingerprint,...http://www.google.de/patents/US8108484?utm_source=gb-gplus-sharePatent US8108484 - Fingerprints and machine-readable codes combined with user characteristics to obtain content or information
