Code Excited Linear Prediction (CELP) algorithms are proposed for compression of speech in 8 kHz band at switched or variable bit rate and algorithmic delay not exceeding 2 msec. Two structures Low-Delay CELP coders analyzed: Low-delay sparse excitation mixed CELP. Sparse is based on MP-MLQ multilayer models. Mixed algorithm stems from the narrowband G.728 standard. As opposed to LD-CELP coder,...

PESQ, Perceptual Evaluation of Speech Quality [5], and POLQA, Perceptual Objective Listening Quality Assessment [1] , are standards comprising a test methodology for automated assessment of voice quality of speech as experienced by human beings. The predictions of those objective measures should come as close as possible to subjective quality scores as obtained in subjective listening tests, us...

Abstract The purpose of this article is to report and discuss the results an analysis carried out on development scientific production communicational studies in Brazil, from 2000 2020, which addresses LGBTQIA + representations advertising. As sources, we considered works published annals three important national events field Communication Sciences, such as: Intercom/Thematic Division (DT) 2 - ...

The mismatch between the numerical and actual nonlinear models is a challenge to acoustic echo cancellation (NAEC) when adaptive filter utilized. To alleviate this problem, we combine basis-generic expansion of memoryless nonlinearity into semi-blind source separation (SBSS). By regarding all basis functions far-end input signal as known equivalent reference signals, an SBSS updating algorithm ...

Most traditional objective indices don’t distinguish between a real sound and a perceived sound, and therefore, these indices have limitations in regard to the evaluation of the real effect of an algorithm under investigation on the auditory perception of a hearingimpaired person. Though several objective indices, such as perceptual evaluation of speech quality (PESQ) and composite measurements...

In the modulation-filtering based speech enhancement method, noise suppression is achieved by bandpass filtering the temporal trajectories of the power spectrum. In the literature, some authors use the power spectrum directly for modulation filtering, while others use different compression functions for reducing the dynamic range of the power spectrum prior to its modulation filtering. This pap...

In mobile devices, perceived speech signal degrades significantly in the presence of background noise as it reaches directly at the listener's ears. There is a need to improve the intelligibility and quality of the received speech signal in noisy environments by incorporating speech enhancement algorithms. This paper focuses on speech enhancement method including auditory masking propertie...

In mobile devices, perceived speech signal degrades significantly in the presence of background noise as it reaches directly at the listener's ears. There is a need to improve the intelligibility and quality of the received speech signal in noisy environments by incorporating speech enhancement algorithms. This paper focuses on speech enhancement method including auditory masking propertie...

In mobile devices, perceived speech signal degrades significantly in the presence of background noise as it reaches directly at the listener's ears. There is a need to improve the intelligibility and quality of the received speech signal in noisy environments by incorporating speech enhancement algorithms. This paper focuses on speech enhancement method including auditory masking propertie...

In this paper we investigate a new statistical excitation mapping technique to enhance throat-microphone speech using joint analysis of throatand acoustic-microphone recordings. In a recent study we employed source-filter decomposition to enhance spectral envelope of the throat-microphone recordings. In the source-filter decomposition framework we observed that the spectral envelope difference ...