Musical Signals
Mostrando 1-8 de 8 artigos, teses e dissertações.
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1. Criação e performance musical no contexto dos instrumentos musicais digitais / Music creation and performance in the context of digital musical instruments
This work presents a study about the computer as an instrument for musical performance. Based on this study we developed processes of music creation using the algorithmic representation and the computer code. The two main technical resources we applied in our works were: a sound synthesis method based on the generation of waveforms by non-linear equations; a
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 25/01/2012
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2. Estudos sobre uma ferramenta de classificação musical / A study on a classifier of musical signals
This work presents the results of some investigations on an automatic musical signal classifier proposed in the literature and notable by its solutions and performance. The objectives were to analyze the viability of extending the applicability of the classifier over new taxonomies, distinct from that proposed by the authors, and to reduce the computational
Publicado em: 2009
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3. Representation models of musical signals by means of Wavelets transform / Modelos de representação de sinais musicais via transformada Wavelets
Neste trabalho, as transformadas wavelet são utilizadas para recodificar e explorar sinais musicais. A idéia central do trabalho é mostrar que a reordenação adequada dos coeficientes provenientes das análises possibilita não somente recodificar de modo econômico o sinal como também transitar por sonoridades distintas. Ou seja, relaciona-se o posicio
Publicado em: 2007
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4. A musica na escola : um privilegio dos especialistas? - concepções dos professores sobre o talento musical e a musica na escola e a representação grafica do som de crianças de 3 a 6 anos de idade
The present research intends to argue the importance of the musical activities for the work with children in the daily one of the school. It presents a qualitative evaluation intitled net natural semantics proposal for Figueroa, González and Solís (1981) on the conception of the professors of infantile education and basic education 1º and 2º cycles on mu
Publicado em: 2006
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5. Redução de ruído em sinais de voz usando curvas especializadas de modificação dos coeficientes da transformada em co-seno. / Speech denoising by softsoft thresholding.
Many noise-reduction methods are based on the possibility of representing the clean signal as a reduced number of coefficients of a block transform, so that cancelling coefficients below a certain thresholding level will produce an enhanced reconstructed signal. It is necessary to assume that the clean signal has a sparse representation, while the noise ener
Publicado em: 2006
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6. A Educação Musical na Terceira Idade: uma proposta metodológica de Sensibilização e Iniciação à Linguagem Musical. / Musical Education with elderly people: a methodology implementation of sensitivity and initiation to the Musical Language.
This research aims to study about the application of a methodological proposal on Musical Education with elderly people. The main objective consists of the systematization and analysis of the results obtained with the methodology implementation of sensitivity and musical initiation experienced by elderly groups. The technique used consisted of the active obs
Publicado em: 2005
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7. Melhoria da qualidade de sinais de fala degradados por ruído através da utilização de sinais sintetizados. / Speech Enhancement using synthetized signals.
Este trabalho discute um novo método para a melhoria da qualidade de sinais de fala degradados por ruído aditivo branco de elevada intensidade (SNR segmentada variando de 10 a 3 dB). A técnica apresentada baseia-se na soma ponderada entre um sinal obtido por subtração espectral e um sinal sintetizado, produzido de acordo com o modelo digital de produç�
Publicado em: 2003
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8. DYNAMIC-SPECTRUM GENERATOR SYSTEM FOR THE SYNTHESIS OF MUSICAL SIGNALS / SISTEMA GERADOR DE ESPECTROS DINÂMICOS DESTINADOS À SÍNTESE DE SINAIS MUSICAIS
It is presented a system capable of synthesize musical signals by generating and processing frequency spectra which can be placed anywhere in the áudio frequency range. For obtaining spectral components which are amplitude and phase controlable, a Fourier series generator was conveived through frequency multipliers which use phase- locked loop techniques. W
Publicado em: 1977