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         author = {Parthasarathi, Sree Hari Krishnan and Rajan, Padmanabhan and Murthy, Hema A},
       projects = {Idiap},
          title = {Robustness of Group Delay Representations for Noisy Speech Signals},
        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.},
            pdf = {https://publications.idiap.ch/attachments/papers/2011/Parthasarathi_IJST(SPRINGER)_2011.pdf}