8,560,913, "Data embedding system," assigned to Intrasonics S.A.R.L. (LU).
A data hiding system is described for hiding data within an audio signal. The system can be used for watermarking, data communications, audience surveying etc. The system hides data in an audio signal by adding artificial echoes whose polarity varies with the data to be hidden. In one embodiment, each data value is represented by a positive and a negative echo having different delays. A receiver can then remove the effects of natural echoes and/or periodicities in the audio signal by differencing measurements obtained at the different delays.
8,560,583, "Media fingerprinting for social networking," assigned to Sony Computer Entertainment Inc. (JP).
Audio fingerprinting and other media matching technologies can be used to identify media, such as movies, television shows, and radio broadcasts. A user device can record image, audio, and/or video information and upload information to a matching service that is able to use matching technology to identify the media and provide supplemental content or information to the user. The user then can share this information with other users, such as by uploading to a social networking site or passing the information to peers on a peer network as part of a container. Users can have the ability to add tagged content, provide comments and ratings, and otherwise interact based at least in part upon the tagged me