Interest points density control for audio matching

摘要

Systems and methods are provided herein relating to audio matching. The density and quality of interest points can be controlled to assure a small but uniform number of high quality interest points. By scoring interest points based on quality and comparing them over time, those interest points that maintain a high quality when compared with a varying number of neighboring interest points can be retained, while those interest points that do not maintain a high quality can be discarded. Thus, the scalability of an audio matching system can be improved while retaining accuracy.

主权项

1. A system comprising:
a memory that has stored thereon computer executable components; and a processor that executes the following computer executable components stored in the memory:
an input component that receives an audio sample;a spectrogram component that generates a spectrogram of the audio sample;an interest point detection component that generates a set of interest points based on local maxima over respective time/frequency windows of the spectrogram, wherein interest points in the set of interest points are associated with time and frequency positions;a quality component that generates and associates respective quality scores with interest points in the set of interest points, wherein a quality score for an interest point is based on a magnitude of the interest point compared to an average magnitude of points of a time/frequency window associated with the interest point; andan interest point filter component that filters the set of interest points based on the respective quality scores associated with the interest points in the set of interest points and a desired density.