New patent applications are published by the USPTO on Thursdays. Today's Spotlight Applications concern aspects of digital fingerprinting and digital watermarking. Assigned to Source Digital, the first application discloses techniques for audio fingerprinting based on audio energy characteristics. Assigned to Nanjing Watermarking Technology (CN), the second application discloses techniques utilizing image code for processing information and device and method for generating and parsing same.
20170294194, "Audio fingerprinting based on audio energy characteristics," assigned to Source Digital, Inc.
Audio fingerprinting includes obtaining audio samples of a piece of audio, generating frequency representations of the audio samples, identifying increasing and decreasing energy regions in frequency bands of the frequency representations, and generating hashes of features of the piece of audio. Each hash of features corresponds to portions of the identified energy regions appearing in a respective time window. Each feature is defined as a numeric value that encodes information representing: a frequency band of an energy region appearing in the respective time window, whether the energy region appearing in the respective time window is an increasing energy region or whether the energy region appearing in the respective time window is a decreasing energy region, and a placement of the energy region appearing in the respective time window.
20170293992, "Image code for processing information and device and method for generating and parsing same," assigned to Nanjing Watermarking Technology CO., LTD, (CN)
An image code is for information storage, transfer and identification, a method of generating and analyzing the same, and an apparatus for implementing the method, the image code includes a standard image area, at least one image filled in the standard image region, at least one segment of information stream implanted in the at least one image by using digital watermarking technique and 4 location identification graphics arranged in different positions of the standard image region, the location identification graphics are arranged in the 4 vertex angles of the standard image region, including 1 feature location identification graphic and 3 basic location identification graphics; the 3 basic location identification graphics are identical and the feature location identification graphic is different from the basic location identification graphic.