Speech Processing Systems
Mostrando 1-12 de 25 artigos, teses e dissertações.
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1. Mismatch Negativity in Childrenwith Cochlear Implant
Abstract Introduction The mismatch negativity (MMN) is a negative long-latency auditory potential elicited by any discriminable change in a repetitive aspect of auditory stimulation. This evoked potential can provide cortical information about the sound processing, including in children who use cochlear implants. Objective To identify MMN characteristics
Int. Arch. Otorhinolaryngol.. Publicado em: 07/10/2019
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2. Modelo mel-cepstral generalizado para envoltória espectral de fala / Mel-generalized cepstral model for speech spectral envelope
A análise Mel-Cepstral Generalizada (MGC) corresponde a uma abordagem para estimação de envoltória espectral de fala que unifica as análises LPC, Mel-LPC, Cepstral e Mel-Cepstral. A forma funcional do modelo MGC varia continuamente com dois parâmetros reais γ e α, possibilitando que o modelo assuma diferentes características. A flexibilidade
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 27/10/2010
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3. Um estudo comparativo de modelos baseados em estatísticas textuais, grafos e aprendizado de máquina para sumarização automática de textos em português
Automatic text summarization has been of great interest in Natural Language Processing due to the need of processing a huge amount of information in short time, which is usually delivered through distinct media. Thus, large-scale methods are of utmost importance for synthesizing and making access to information simpler. They aim at preserving relevant conten
Publicado em: 2010
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4. Estudo prosódico das disfluências de reparo
The aim of this dissertation is to describe the prosodic features present in spontaneous speech containing repair disfluências and compare which of these features can diferentiate from the fluent speech. Repair disfluencies strings of sentences in which the speaker corrects himself just after noticing the production of a wrong information. Although they are
Publicado em: 2009
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5. Portuguese corpus-based learning using ETL
We present Entropy Guided Transformation Learning models for three Portuguese Language Processing tasks: Part-of-Speech Tagging, Noun Phrase Chunking and Named Entity Recognition. For Part-of-Speech Tagging, we separately use the Mac-Morpho Corpus and the Tycho Brahe Corpus. For Noun Phrase Chunking, we use the SNR-CLIC Corpus. For Named Entity Recognition,
Journal of the Brazilian Computer Society. Publicado em: 2008-12
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6. Segmentação de voz baseada na análise fractal e na transformada wavelet. / Speech segmentation based on fractal analysis and wavelet transform.
Nowadays, fractal analysis has been successfully applied to digital speech processing, particularly for words and phonemes segmentation, which represents one of the fundamental steps in automatic speech recognition and speaker identification systems. The practical use of fractal analysis for these purposes should match two principles: low computational cost,
Publicado em: 2008
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7. Como sobrevivem as diferentes noções de álgebra linear nos cursos de engenharia elétrica e nas instituições
This research included in the current project called In Search of propitious situations for learning basic concepts of Linear Algebra of Group s Studies of Education Algebraic (GPEA) of the Pontifical Catholic University of São Paulo (PUC-SP), proposes find elements that meet issues inherent in this research: Why and how should be tauch the discipline Linea
Publicado em: 2008
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8. Sintese e reconhecimento da fala humana / Synthesis and recognition of human speech
The goal of this dissertation is to review the main concepts relating to the synthesis, processing, and recognition of human speech by computer. These technologies have many applications, which have increased substantially in recent years after the spread of portable communication equipment (mobile phones, laptops, palmtops) and the universal access to the I
Publicado em: 2006
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9. Conversion grapheme-phone for a system of recognition of voice with support the great vocabularies for the Brazilian Portuguese / Conversão grafema-fone para um sistema de reconhecimento de voz com suporte a grandes vocabulários para o português brasileiro
Speech processing has become a data-driven technology. Hence, the success of research in this area is linked to the existence of public corpora and associated resources, as a phonetic dictionary. In contrast to other languages such as English, one cannot find, in public domain, a Large Vocabulary Continuos Speech Recognition (LVCSR) System for Brazilian Port
Publicado em: 2006
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10. A new method for determining the number of gaussians in hidden Markov models for continuos speech recognition systems / Metodo para a determinação do numero de gaussianas em modelos ocultos de Markov para sistemas de reconhecimento de fala continua
Nowadays, HMM-based speech recognition systems are used in many real time processing applications, from cell phones to auto mobile automation. In this context, one important aspect to be considered is the HMM complexity, which directly determines the system computational load. So, in order to make the system feasible for practical purposes, it is interesting
Publicado em: 2006
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11. Algoritmos OPWI e LDM-GA para sistemas de conversão texto-fala de alta qualidade empregando a tecnologia SCAUS / Algorithm OPWI and LDM-GA for high quality text-to-speech synthesis based on automatic unit selection
This Thesis presents two new algorithms for Unit Selection Based Text-to-Speech systems (USBTTS). The first algorithm is the OPWI (Optimized Prototype Waveform Interpolation), which was designed to be used as a Back-End module for USB-TTS. The second algorithm is the LDM-GA (Linguistic Data Mining Using Genetic AIgorithm), which was designed to minimize trai
Publicado em: 2006
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12. 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