Name
Abstract | ||
|---|---|---|
Estimation of the spectral envelope in the frequency domain allows to avoid some problems of linear prediction (LP) algorithms for voiced speech. We present a low complexity method of spectral envelope estimation from harmonics for low rate coding. The method consists in computing the harmonic amplitude spectrum using pitch-synchronous DFT with length depending on voicing, modifying this spectrum outside the telephone bandwidth to simplify modeling of the useful bandwidth and interpolating it by a frequency-domain low-pass filter. An all-pole model is then fitted to this modified smoothed version of the harmonic spectrum. The method was implemented on the harmonic-stochastic excitation (HSX) vocoder and the performance was compared with the LP algorithm similar to that used in the G.729 speech coding standard. A-B comparative tests show an important increase in perceptual quality. |
Year | DOI | Venue |
|---|---|---|
1999 | 10.1109/ICASSP.1999.758110 | Acoustics, Speech, and Signal Processing, 1999. Proceedings., 1999 IEEE International Conference |
Keywords | Field | DocType |
computational complexity,discrete Fourier transforms,frequency-domain analysis,harmonic analysis,interpolation,low-pass filters,spectral analysis,speech coding,transform coding,G.729 speech coding standard,HSX vocoder,all-pole mode,frequency-domain low-pass filter,frequency-domain spectral envelope estimation,harmonic amplitude spectrum,harmonic-stochastic excitation vocoder,interpolation,low complexity method,low rate coding,modified smoothed version,perceptual quality,performance,pitch-synchronous DFT,useful bandwidth,voiced speech | Frequency domain,Spectral envelope,Speech coding,Computer science,Harmonic,Linear prediction,Speech recognition,Bandwidth (signal processing),Harmonic Vector Excitation Coding,Harmonic spectrum | Conference |
Volume | ISSN | ISBN |
1 | 1520-6149 | 0-7803-5041-3 |
Citations | PageRank | References |
6 | 1.34 | 8 |
Authors | ||
2 | ||
Name | Order | Citations | PageRank |
|---|---|---|---|
| Jelinek, M. | 1 | 6 | 1.34 |
| J. Adoul | 2 | 290 | 63.42 |