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. |
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| Projects |
Idiap |
| Authors | |
| Added by: | [UNK] |
| Total mark: | 0 |
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