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- W2115675554 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." @default.
- W2115675554 created "2016-06-24" @default.
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- W2115675554 date "1999-01-01" @default.
- W2115675554 modified "2023-09-26" @default.
- W2115675554 title "Frequency-domain spectral envelope estimation for low rate coding of speech" @default.
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- W2115675554 doi "https://doi.org/10.1109/icassp.1999.758110" @default.
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