Low bit quantization of the smoothed group delay spectrum for speech recognition
- 4 December 2002
- conference paper
- Published by Institute of Electrical and Electronics Engineers (IEEE)
- No. 15206149,p. 761-764
- https://doi.org/10.1109/icassp.1990.115907
Abstract
The coefficients of the smoothed group delay spectrum (SGDS) are calculated by discrete-time Fourier transform of the linear prediction coefficients, i.e. the representation is in the frequency domain. Isolated word recognition experiments with a low bit quantization of these SGDS coefficients are reported. It is shown that recognition accuracy can be maintained using only 26 b/frame as compared to the conventional calculation with floating-point accuracy. Using a bark scale representation the error rate can be even further reduced.Keywords
This publication has 2 references indexed in Scilit:
- On the use of bandpass liftering in speech recognitionPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2005
- Distance measure for speech recognition based on the smoothed group delay spectrumPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2005