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Cochlear implant filterbank design and optimization : a simulation study
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| 2 |
Towards objective measures of speech intelligibility for Cochlear Implant users in reverberant environments
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Abstract:
This study validates a novel approach to predict speech intelligibility for Cochlear Implant users (CIs) in reverberant environments. More specifically, we explore the use of existing objective quality and intelligibility metrics, applied directly to vocoded speech degraded by room reverberation, here assessed at ten different reverberation time (RT60) values: 0 s, 0.4 s - 1.0 s (0.1 s increments), 1.5 s and 2 s. Eight objective speech intelligibility predictors (SIPs) were investigated in this study. Of these, two were non-intrusive (i.e. did not require a reference signal) audio quality measures, four were intrusive, and two were intrusive speech intelligibility indexes. Three types of vocoders were implemented to examine how speech intelligibility predictions depended on the vocoder type. These were: noise-excited vocoder, tone-excited vocoder and a FFT-based N-of-M vocoder. Experimental results show that several intrusive quality and intelligibility measures were highly correlated with exponentially fit CI intelligibility data. On the other hand, only a recently - developed non-intrusive measure showed high correlations. These evaluations suggest that CI intelligibility may be accurately assessed via objective metrics applied to vocoded speech, thus may reduce the need for expensive and time-consuming listening tests. ; 6 page(s)
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Keyword:
cochlear Implants; objective Measures; reverberation; speech Intelligibility; vocoders
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URL: http://hdl.handle.net/1959.14/1202745
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| 3 |
Objective Measurement of the Speech Transmission Quality of Vocoders by Means of the Speech Transmission Index
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In: DTIC (2005)
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Speech Analysis and Synthesis Based on Pitch-Synchronous Segmentation of the Speech Waveform.
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In: DTIC AND NTIS (1994)
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The Intelligibility of Natural and LPC-Vocoded Words and Sentences Presented to Native and Non-Native Speakers of English
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In: DTIC AND NTIS (1990)
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Vocabulary Synthesis Based on Line Spectrum Pairs
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In: DTIC AND NTIS (1989)
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The Intelligibility of Natural and Vocoded Semantically Anomalous Sentences: A Comparative Analysis of English Monolinguals and German-English Bilinguals.
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In: DTIC AND NTIS (1987)
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| 8 |
Hopfield Model Applied to Vowel and Consonant Discrimination
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In: DTIC AND NTIS (1986)
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The Intelligibility of Non-Vocoded and Vocoded Semantically Anomalous Sentences.
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In: DTIC AND NTIS (1985)
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A Comparative Analysis of Whispered and Normally Phonated Speech Using an LPC-10 Vocoder
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In: DTIC AND NTIS (1985)
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Intelligibility Performance of the LPC-10 and APC/SQ Speech Algorithms in a Fading Environment.
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In: DTIC AND NTIS (1985)
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| 12 |
Automatic Speaker Recognition over Military Communication Systems. A Feasibility Evaluation.
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In: DTIC AND NTIS (1985)
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Subjective and Objective Evaluation of Pitch Extractors for LPC and Harmonic Deviations Vocoders.
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In: DTIC AND NTIS (1984)
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A Recursive Linear Predictive Vocoder.
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In: DTIC AND NTIS (1983)
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| 15 |
Vector/Matrix Quantization for Narrow-Bandwidth Digital Speech Compression.
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In: DTIC AND NTIS (1982)
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| 16 |
Research on Narrowband Communications.
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In: DTIC AND NTIS (1982)
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| 17 |
Research on Narrowband Communications
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In: DTIC AND NTIS (1981)
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Research on Narrowband Communications
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In: DTIC AND NTIS (1981)
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| 19 |
Research on Narrowband Communications
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In: DTIC AND NTIS (1981)
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| 20 |
Research on Narrowband Communications
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In: DTIC AND NTIS (1981)
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