Systems and methods for recognizing sound and music signals in high noise and distortion

摘要

A method for recognizing an audio sample locates an audio file that closely matches the audio sample from a database indexing a large set of original recordings. Each indexed audio file is represented in the database index by a set of landmark timepoints and associated fingerprints. Landmarks occur at reproducible locations within the file, while fingerprints represent features of the signal at or near the landmark timepoints. To perform recognition, landmarks and fingerprints are computed for the unknown sample and used to retrieve matching fingerprints from the database. For each file containing matching fingerprints, the landmarks are compared with landmarks of the sample at which the same fingerprints were computed. If a large number of corresponding landmarks are linearly related, i.e., if equivalent fingerprints of the sample and retrieved file have the same time evolution, then the file is identified with the sample.

主权项

1. A method performed by a computing device, the method comprising:
receiving a media sample; determining, by the computing device, a time-frequency representation of the media sample; determining, by the computing device, salient points in the time-frequency representation of the media sample; and generating, by the computing device, fingerprints of the media sample based on combinations of the salient points.