In this paper, low-complexity block-constrained trellis coded quantization (BC-TCQ) structures are introduced, and a predictive BC-TCQ encoding method is developed for quantization of line spectrum frequencies (LSF) p...
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In this paper, low-complexity block-constrained trellis coded quantization (BC-TCQ) structures are introduced, and a predictive BC-TCQ encoding method is developed for quantization of line spectrum frequencies (LSF) parameters for wideband speech coding applications. The performance is compared to the linear predictive coding (LPC) vector quantizers used in the AMR-WB (ITU-G.722.2) speech coding standard, demonstrating reduction in spectral distortion and significant reduction in encoding complexity.
We develop a wavelet-based action potential detection method to lower the level of signal-to-noise ratio (SNR) required for successful detection. It is based on point-wise product of wavelet coefficients of several sc...
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We develop a wavelet-based action potential detection method to lower the level of signal-to-noise ratio (SNR) required for successful detection. It is based on point-wise product of wavelet coefficients of several scales, and effectively performs the role of combination of matched filters. We show its performance for various neural signal recordings. Detection of action potential from extracellular neural signal can be difficult due to the low SNR and high similarity between the target signal and noise. In previous studies or experimental neurophysiology using the extracellular recording, only the action potentials with sufficiently large amplitude have been gathered and analyzed. We compared its performance with those of the linear optimal filter and the Teager energy operator, and showed the superiority or the proposed detector over them. Test was performed for various SNR values and degrees or spectral similarity between the target signal and the noise.
This book constitutes the refereed proceedings of the 13th International Conference on Social robotics, ICSR 2021, held in Singapore, Singapore, in November 2021. The conference was held as a hybrid event.
ISBN:
(数字)9783030905255
ISBN:
(纸本)9783030905248
This book constitutes the refereed proceedings of the 13th International Conference on Social robotics, ICSR 2021, held in Singapore, Singapore, in November 2021. The conference was held as a hybrid event.
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