4th International Conference on Spoken Language Processing

Philadelphia, PA, USA
October 3-6, 1996

Frequency and Time Filtering of Filter-bank Energies for HMM Speech Recognition

Climent Nadeu, José B. Mariño, Javier Hernando, Albino Nogueiras

Universitat Politècnica de Catalunya, Barcelona, Spain

In speech recognition, a discriminative quefrency weighting can be achieved by somewhat decorrelating the frequency sequence of log mel-scaled filter-bank energies with a computationally inexpensive filter. In this paper, we show how the spectral parameters that result from this kind of frequency filtering, both alone and combined with filtering of their time trajectories, are competitive with respect to the conventional cepstral representations of speech signals.

Full Paper

Bibliographic reference.  Nadeu, Climent / Mariño, José B. / Hernando, Javier / Nogueiras, Albino (1996): "Frequency and time filtering of filter-bank energies for HMM speech recognition", In ICSLP-1996, 430-433.