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Low Complexity Transient Detection in Audio Coding Using an Image Edge Detection Approach

In this paper we propose a new low complexity method of transient detection using an image edge detection approach. In this method, the time-frequency spectrum of an audio signal is considered as an image. Using appropriate mapping function for converting energy bins into pixels, audio transients correspond to rectilinear edges in the image. Then, the transient detection problem is equivalent to an edge detection problem. Inspired by standard image methods of edge detection, we derive a detection function specific to rectilinear edges that can be implemented with a very low complexity. Our method is evaluated in two practical audio coding applications, in replacement of the SBR transient detector in HEAAC+ V2 and in the stereo parametric tool of MPEG USAC.

Authors: Capobianco, Julien; Pallone, Grégory; Daudet, Laurent
Affiliations: France Telecom Orange Labs/TECH/OPERA, Lannion Cedex, France; University Paris Diderot, Paris, France(See document for exact affiliation information.)
AES Convention:133 (October 2012) Paper Number:8796 Import into BibTeX
Subject:Analysis and Synthesis of Sound

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