ETSI AMR-2 VAD: evaluation and ultra low-resource implementation

The ETSI AMR-2 VAD is rigorously evaluated in clean and noisy conditions. The VAD is then simplified and optimized for porting to an ultra low-resource DSP system using a fast oversampled DFT filterbank. The parameters of the low-resource VAD are optimized using two speakers and 6 types of noise at...

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Bibliographic Details
Main Authors: Cornu, E., Sheikhzadeh, H., Brennan, R.L., Abutalebi, H.R., Tam, E.C.Y., Iles, P., Wong, K.W.
Format: Conference Proceeding
Language:English
Subjects:
Codecs
Digital signal processing
Filter bank
Frequency domain analysis
Frequency estimation
Hardware
Noise cancellation
Speech processing
Telecommunication standards
Testing
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Summary:The ETSI AMR-2 VAD is rigorously evaluated in clean and noisy conditions. The VAD is then simplified and optimized for porting to an ultra low-resource DSP system using a fast oversampled DFT filterbank. The parameters of the low-resource VAD are optimized using two speakers and 6 types of noise at SNRs from -10 to 20 dB. The VAD is then tested by employing sentences from two other speakers and 12 different types of noise. Results show that the low-resource VAD offers a performance comparable to that of the ETSI VAD in both clean and noisy conditions. When deployed on a custom DSP running at a clock speed of 1.28 MHz and consuming less than 1 milliWatt of power, the low-resource VAD uses less than 30% of the available system resources.
DOI:10.1109/ICME.2003.1221748