Bandwidth expansion of narrowband speech using non-negative matrix factorization

Dhananjay Bansal, Bhiksha Raj, Paris Smaragdis

Research output: Contribution to conferencePaperpeer-review

Abstract

In this paper, we present a novel technique for the estimation of the high frequency components (4-8kHz) of speech signals from narrow-band (0-4 kHz) signals using convolutive Non-Negative Matrix Factorisation (NMF). The proposed technique utilizes a brief recording of simultaneous broad band and narrow band signals from a target speaker to learn a set of broad-band non-negative "bases" for the speaker. The low-frequency components of these bases are used to determine how the high-frequency components must be combined in order to reconstruct the high-frequency components of new narrow-band signals from the speaker. Experiments reveal that the technique is able to reconstruct broadband speech that is perceptually virtually indistinguishable from true broadband recordings.

Original languageEnglish (US)
Pages1505-1508
Number of pages4
StatePublished - 2005
Externally publishedYes
Event9th European Conference on Speech Communication and Technology - Lisbon, Portugal
Duration: Sep 4 2005Sep 8 2005

Other

Other9th European Conference on Speech Communication and Technology
Country/TerritoryPortugal
CityLisbon
Period9/4/059/8/05

ASJC Scopus subject areas

  • General Engineering

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