New pending patent applications are published by the USPTO on Thursdays. Both of today's Spotlight Applications concern aspects of digital fingerprinting. Assigned to Vobile, the first application discloses techniques for fingerprinting and identifying realtime broadcasting signals. Assigned to Thomson (FR), the second application discloses techniques for generating a fingerprint of an audio signal.
20160248526, "Systems and methods of fingerprinting and identifying realtime broadcasting signals," apparently assigned to Vobile, Inc.
Systems and methods are provided for identifying a video object using digital fingerprints. The digital fingerprints are generated from information extracted from the video object including encoded video. The digital fingerprints can be calculated in a manner that permits identification of both the video object and operational characteristics of the video object based on matching calculated digital fingerprints with known fingerprints of known video objects. Systems and methods are described that allow a DVD to be uniquely identified and identify whether the DVD is original, copied or pirated. Systems and methods are described for computing digital fingerprints from strings of bits in which certain additional data is optionally embedded. Systems and methods are described that permit media players to access known signatures of known video objects maintained on one or more databases and to identify video objects presented for playing on the media player. In the parent application, the video object is extended to media content including video and audio, and DVD is extended to media file, network stream and other content mediums. In the present application, the media content is extended to real-time broadcasting signals.
20160247512, "Method and apparatus for generating fingerprint of an audio signal," assigned to Thomson (FR).
Methods and apparatus for generating a fingerprint of an audio signal are disclosed. The method comprises: detecting peaks in a representation of a temporal spectrum of frequencies of the audio signal, a peak being defined as a point in the representation which has a higher energy than its neighboring points; and generating the fingerprint of the audio signal as a function of a distribution of positions of the detected peaks along a frequency axis and a distribution of positions of the detected peaks along a time axis. The fingerprint of the disclosure is not only robust to many types of noise, but also robust against time scale modification and frequency shifting.