System and methods for recognizing sound and music signals in high noise and distortion
US7865368B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 14, 2008 |
| Grant date | Jan 4, 2011 |
| Priority date | — |
| Expiry date | Jan 27, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B27/28
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method for recognizing an audio sample locates an audio file that most 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. The method can be used for any type of sound or music, and is particularly effective for audio signals subject to linear and nonlinear distortion such as background noise, compression artifacts, or transmission dropouts. The sample can be identified in a ti…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.