Assigned to Vobile, the first application describes techniques for fingerprinting digital video objects based on multiresolution, multirate spatial and temporal signatures. Assigned to Digimarc, the second application describes techniques for fingerprinting media signals.
20070253594, "Method And System For Fingerprinting Digital Video Object Based On Multiresolution, Multirate Spatial And Temporal Signatures Abstract," assigned to Vobile, Inc.
A method and system for generating a fingerprint for a video object. The method includes obtaining a plurality of frames associated with a video object. Additionally, the method includes, for each of the plurality of frames, processing information associated with the plurality of frames, determining a plurality of spatial signatures for the each of the plurality of frames based on at least information associated with the each of the plurality of frames, and determining a plurality of temporal signatures for the each of the plurality of frames based on at least information associated with the plurality of frames. The plurality of spatial signatures corresponds to a plurality of resolutions respectively, and the plurality of temporal signatures corresponding to a plurality of frame rates respectively.
20070250716, "Fingerprinting of Media Signals," assigned to Digimarc.
The present invention relates generally to fingerprinting, e.g., a reduced-bit representation or other identifier of a media signal (e.g., audio, video or still images). One method recites: receiving a partial fingerprint of a media signal, wherein the partial fingerprint is derived from the media signal itself, the partial fingerprint being computed a first location; processing the partial fingerprint to obtain a more refined fingerprint, relative to the partial fingerprint, the act of processing occurring at a second location that is remote from the first location; and based at least in part of the refined fingerprint, identifying the media signal or information associated with the media signal. Another method recites: obtaining a fingerprint derived from a media signal, the fingerprint comprising a reduce-bit representation of the media signal; determining information associated with the fingerprint or the media signal; and causing a text message to be sent to a mobile device representing at least a portion of the information. Of course, other methods and combinations are described and claimed as well.