On Thursdays the UPSTO publishes new pending patent applications. Today's Spotlight Applications address aspects of digital watermarking and digital fingerprinting. Assigned to Kaleidescape, the first application discloses techniques for watermarking and fingerprinting digital content using alternative blocks to embed information. The second application discloses techniques for matching a query against a broadcast stream, no assignee given.
20120237078, "Watermarking and fingerprinting digital content using
alternative blocks to embed information," assigned to Kaleidescape, INC.
A method of embedding information in digital content representing media streams. The method includes (1) selecting a set of locations within that digital content reprensenting the media stream to embed information, (2) selecting a set of possible alterations to make at those locations, and (3) making a subset of the possible alterations. The set of locations and possible alterations is herein sometimes called a "watermark." The subset of actual alterations that are made is herein sometimes called a "fingerprint." The method determines a set of locations at which there are alternative versions of digital content representing the same media stream, such as one being the original and one being an alternative version of the same digital content, herein sometimes called the "original movie" and the "alt-movie," or herein sometimes called the "original block" and the "alt-block" for a particular block in the digital content representing the media stream.
20120239175, "System and method for matching a query against a broadcast stream," no assignee given.
A method for identifying with a broadcast stream. That method includes receiving one or more broadcast streams, from which it generates and stores an audio fingerprint of a selected portion of each received broadcast stream. A query is received, and the method generates an audio fingerprint of the query. From that point, the method continues by identifying audio content from the query, using the query audio fingerprint and a database of indexed audio content. The method concludes by identifying the source of the query using the query audio fingerprint and the stored audio fingerprints. Embodiments of the method further include predictively caching audio fingerprint sequences and corresponding audio item identifiers from a server after storing audio fingerprints extracted from the broadcast stream; and using the predictively cached audio fingerprint sequences to identify an audio item within the audio signal based on at least some additional audio fingerprints of the audio signal