On Thursdays the USPTO publishes new pending patent applications. Today's Spotlight Applications concern aspects of digital fingerprinting and digital watermarking. Assigned to Verizon, the first application discloses techniques for universal file naming for personal media over content delivery networks. Assigned to Intrasonics (LU), the second application discloses techniques for data embedding.
20120005245, "Universal file naming for personal media over content delivery networks," assigned to Verizon Patent and Licensing, Inc.
A device receives, from a content provider device, a personal media file with a custom name and generates a universal file name for the file based on a digital fingerprint extracted from the file. The device associates the universal file name with the custom name and determines that the universal file name is associated with a previously-stored file, where the previously-stored file and the file with the custom name have an identical digital fingerprint. The device discards the file with the custom name, and associates the custom name with the universal file name for later retrieval.
20120004920, "Data embedding system," 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.