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Convention Paper

Perceptual Matching Pursuit for Audio Coding

Authors: Lahdili, Hassan; Najaf-Zadeh, Hossein; Pichevar, Ramin; Thibault, Louis

AES Convention 124 · Paper 7483 · May 2008

Abstract

This paper introduces a Perceptual Matching Pursuit (PMP) algorithm for audio coding. A masking model has been developed and integrated into the matching pursuit algorithm to account for the characteristics of the hearing system. By doing so, only an audible kernel is extracted at each iteration. Moreover, contrary to the matching pursuit algorithm, PMP will stop decomposing an audio signal once there is no audible part left in the residual. We have used ITU-R PEAQ to compare audio materials decomposed by PMP and by matching pursuit. Objective scores for PMP increase by up to 1 unit. A semi-formal listening test has verified the objective scores and shown the perceptual superiority of PMP over the matching pursuit algorithm.

Details

Published in
AES Convention 124
AES Convention
124
Paper number
7483
Publication date
May 6, 2008
Session subject
Low Bit-Rate Audio Coding
Affiliation
Communications Research Centre Canada (See document for exact affiliation information.)
Type
Convention Paper