New patents are issued by the USPTO on Tuesdays. Both of this week's Spotlight Patents concern aspects of digital fingerprinting. Assigned to Silveredge Technologies (IN), the first patent addresses techniques for hardware agnostic detection of television advertisements. Assigned to Sorenson Media, the second patent addresses techniques for fingerprinting media content using hashing.
10,117,000, "Method and system for hardware agnostic detection of television advertisements," assigned to Silveredge Technologies Pvt. Ltd. (IN).
A system and method for hardware agnostic detection of one or more advertisements broadcasted across one or more channels includes extracting a first set of audio fingerprints and a first set of video fingerprints. The method also includes generating a set of digital signature values corresponding to an extracted set of video fingerprints, and normalizing each frame of a pre-determined number of frames of a video. The method also includes scaling each frame of the corresponding pre-determined number of frames of the video clip to a pre-defined scale. Each frame corresponds to the broadcasted media content on the channel. The method also includes trimming a first pre-defined region and a second pre-defined region of each frame by a pre-defined percentage of a frame width, a frame height and a pre-defined number of pixels in each frame.
10,116,987, "Fingerprinting media content using hashing," assigned to Sorenson Media, Inc.
A server device includes memory to store: a database of frame fingerprints ordered sequentially by media item number and frame number for media items, and a hash table containing (key, value) entries each including a hashed frame fingerprint and index number(s) to the database. A processor coupled to the memory is to, for an input set of hashed frame fingerprints, select a most recent hashed frame fingerprint. The processor performs a lookup with the most recent hashed frame fingerprint to identify a plurality of index numbers from a matching entry. The processor retrieves a target plurality of frame fingerprints from the database using each of the plurality of index numbers as a starting point; calculates a rank distance between the input set and each respective target plurality of frame fingerprints; and selects the target plurality of frame fingerprints for which the rank distance is shortest, to identify a media item.