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Robustness of Group Delay Representations for Noisy Speech Signals
Type of publication: Journal paper
Citation: Parthasarathi_IJST(SPRINGER)_2011
Publication status: Accepted
Journal: IJST (Springer)
Volume: 14
Number: 4
Year: 2011
Abstract: This paper demonstrates the robustness of group delay based features to additive noise. First, we analytically show the robustness of group delay based represen- tations. The analysis makes use of the fact that, for minimum-phase signals, the group delay function can be represented in terms of the cepstral coefficients of the log-magnitude spectrum. Such a representation results in the speech spectrum dominating over the noise spectrum, both at low and high SNRs. Further, we ex- perimentally demonstrate the robustness of the representation on a voice activity detection (VAD) task, comparing a group delay based VAD algorithm with standard VAD methods as well as a magnitude-spectrum based method.
Projects Idiap
Authors Parthasarathi, Sree Hari Krishnan
Rajan, Padmanabhan
Murthy, Hema A
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  • Parthasarathi_IJST(SPRINGER)_2011.pdf