Speech Coding
Mostrando 1-12 de 20 artigos, teses e dissertações.
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1. Auditory Speech Perception Tests in Relation to the Coding Strategy in Cochlear Implant
Abstract Introduction The objective of the evaluation of auditory perception of cochlear implant users is to determine how the acoustic signal is processed, leading to the recognition and understanding of sound. Objective To investigate the differences in the process of auditory speech perception in individuals with postlingual hearing loss wearing a coc
Int. Arch. Otorhinolaryngol.. Publicado em: 2016-09
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2. Efeito de diferentes estratégias de codificação dos processadores de fala na voz de crianças usuárias de implante coclear / Effect of different speech processors coding strategies on the voice of children with cochlear implants
The cochlear implant has the pupose of providing hearing perception for individuals with severe and profound hearing loss. The implants use result on optimization of development of language, speech and voice production of its users. This device is one of the most promissing and effective technologies to remedy hearing loss, and its results depend highly on t
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 29/06/2011
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3. E tenho dito: a gramaticalizaÃÃo e a variaÃÃo do pretÃrito perfeito composto em narrativas dos sÃculos XV a XVII / And I have said: The grammaticalization and the change in past tense compound in narratives in century XV - XVII
In this dissertation, we deal with the grammaticalization of past tense compound in Portuguese. We discuss linguistic change, based on the correlation form(s)-function(s) in two lines of analysis: (I) the grammaticalization continuum of to have/there to be (full) + adjectival participle >to have/there to be (auxiliary) + verb participle and (ii) the linguist
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 03/12/2010
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4. COVERING CODES: BOUNDS AND HEURISTICS / CÓDIGOS DE ABERTURA: LIMITES E HEURÍSTICAS
Data compression, speech coding, móbile telecommunications and error-corretion are some of the practical apllications of the covering codes study, an important field of coding theory. This work addresses two problems of covering codes: the classic code covering problem and the recent short code covering problem. It presents an application of Reactive Tabu S
Publicado em: 2009
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5. Análise e síntese da fala por interpolação de ondas
This doctoral dissertation addresses to study of waveform interpolation (WI) for speech coding, and the description, visualization and implementation of an algorithm to simulate a conventional WI system of analysis synthesis of speech signal, like portion of a WI system for coding - decoding that operates on the outer layer which is called of WI analysis syn
Publicado em: 2005
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6. Estudo e Aperfeiçoamento do Vocoder de Transformada Senoidal
The basic sinusoidal analysis/synthesis system is presented and recent parameters codification techniques are studied. In addition, new methods for improving the speech quality of Sinusoidal Transform Vocoders at 2,4 and 4,8 Kbps are presented. One of them is a refinement in the pitch estimation, since pitch accuracy is essential for the efficiency of the ha
Publicado em: 2004
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7. Efeito de uma operação sobre a falta : o des-fazimento das historias infantis no sonho e na fala da criança
What is the symbolic (function) efficacy of children?s stories (wonderful tales) on the child?s way through language? That is the question which directs this research. It is useful to say that the expression ?children?s stories? points to the effect of which a fictional narrative produces on the subject. Futhermore, the meaning for ?children?s stories? is ba
Publicado em: 2004
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8. O GT 10 da ANPED: a leitura em foco
This research, located in the area of education and discourse, analyzes a corpus made up of twelve scientific/research productions, whose thematic approach is that of reading, presented at the 24th/2001 and 25th/2002 GT Literacy, Reading and Writing meetings of ANPED (the National Association of Research in Education). In this context, the general objective
Publicado em: 2004
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9. Algoritmos de busca em codificadores ACELP
This work presents a review of the code-excited linear predictive (CELP) voice coding scheme, and a detailed and structured study of the search algorithms for algebraic multipulse codebooks (ACELP). In addition to the study of the current algorithms, this work also proposes a new search method, named as position-sequential search. Throughout this work the se
Publicado em: 2002
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10. Estudo da viabilidade da utilização de codigo de Reed Solomon na codificação de canal movel TDMA
This study aims to investigate the use of Reed-Solomon codes in the channel coding of the TDMA IS-136 system. Block codes seem to be more suitable to the time slot structure of the TDMA frame. Moreover, the choice of a Reed-Solomon code was based on the best capability and the minimization of the redundant bits introduced by the actual convolutional encoding
Publicado em: 2002
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11. CODIFICACIÓN DE VOZ A TASAS MEDIAS ABAJO DE 2 KB/S / CODIFICAÇÃO DE VOZ A TAXAS MÉDIAS ABAIXO DE 2 KB/S / SPEECH CODING AT AVERAGE RATES BELOW 2KB/S
Esta disertación propone algoritmos para codificaciones de voz a tasas medias en torno de 1,2 Kb/s. Se propone un esquema de cuantización vectorial predictiva, con desempeño superior a los esquemas previamente descritos en la literatura. Este esquema se evalúa en canal con o sin ruido. Se examinan detectores eficientes de período fundamental y de sueño
Publicado em: 2001
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12. STUDY ON SPEECH CODING IN SUB-BANDS AT 16 KBITS/S / ESTUDO DE CODIFICAÇÃO DE VOZ EM SUB-BANDAS A 16 KBIT/S
In this thesis a study of 16 kbit/s sub-band coding of speech signals is presented. The encoding systems are examined in terms of the number of sub-bands, the schemes used to encode the sub-band signals, the parameters and techniques employed in the quantizers adaptation and the type of bit allocation. Spectral decomposition of the input signal is carried ou
Publicado em: 1986