Intelligibility of speech with filtered time trajectories of spectral envelopes

Takayuki Arai; Misha Pavel; Hynek Hermansky; Carlos Avendano

Intelligibility of speech with filtered time trajectories of spectral envelopes

Takayuki Arai, Misha Pavel, Hynek Hermansky, Carlos Avendano

Biomedical Engineering

Research output: Contribution to conference › Paper

62 Scopus citations

Abstract

The effect of filtering the time trajectories of spectral envelopes on speech intelligibility was investigated. Since LPC cepstrum forms the basis of many automatic speech recognition systems, we filtered time trajectories of LPC cepstrum of speech sounds, and the modified speech was reconstructed after the filtering. For processing, we applied low-pass, high-pass and band-pass filters. The results of the accuracy from the perceptual experiments for Japanese syllables show that speech intelligibility is not severely impaired as long as the filtered spectral components have 1) a rate of change faster than 1 Hz when high-pass filtered, 2) a rate of change slower than 24 Hz when low-pass filtered, and 3) a rate of change between 1 and 16 Hz when band-pass filtered.

Original language	English (US)
Pages	2490-2493
Number of pages	4
State	Published - Dec 1 1996
Event	Proceedings of the 1996 International Conference on Spoken Language Processing, ICSLP. Part 1 (of 4) - Philadelphia, PA, USA Duration: Oct 3 1996 → Oct 6 1996

Other

Other	Proceedings of the 1996 International Conference on Spoken Language Processing, ICSLP. Part 1 (of 4)
City	Philadelphia, PA, USA
Period	10/3/96 → 10/6/96

ASJC Scopus subject areas

Computer Science(all)

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Arai, T., Pavel, M., Hermansky, H., & Avendano, C. (1996). Intelligibility of speech with filtered time trajectories of spectral envelopes. 2490-2493. Paper presented at Proceedings of the 1996 International Conference on Spoken Language Processing, ICSLP. Part 1 (of 4), Philadelphia, PA, USA, .

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author = "Takayuki Arai and Misha Pavel and Hynek Hermansky and Carlos Avendano",

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AU - Arai, Takayuki

AU - Pavel, Misha

AU - Hermansky, Hynek

AU - Avendano, Carlos

PY - 1996/12/1

Y1 - 1996/12/1

N2 - The effect of filtering the time trajectories of spectral envelopes on speech intelligibility was investigated. Since LPC cepstrum forms the basis of many automatic speech recognition systems, we filtered time trajectories of LPC cepstrum of speech sounds, and the modified speech was reconstructed after the filtering. For processing, we applied low-pass, high-pass and band-pass filters. The results of the accuracy from the perceptual experiments for Japanese syllables show that speech intelligibility is not severely impaired as long as the filtered spectral components have 1) a rate of change faster than 1 Hz when high-pass filtered, 2) a rate of change slower than 24 Hz when low-pass filtered, and 3) a rate of change between 1 and 16 Hz when band-pass filtered.

AB - The effect of filtering the time trajectories of spectral envelopes on speech intelligibility was investigated. Since LPC cepstrum forms the basis of many automatic speech recognition systems, we filtered time trajectories of LPC cepstrum of speech sounds, and the modified speech was reconstructed after the filtering. For processing, we applied low-pass, high-pass and band-pass filters. The results of the accuracy from the perceptual experiments for Japanese syllables show that speech intelligibility is not severely impaired as long as the filtered spectral components have 1) a rate of change faster than 1 Hz when high-pass filtered, 2) a rate of change slower than 24 Hz when low-pass filtered, and 3) a rate of change between 1 and 16 Hz when band-pass filtered.

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