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Q1236251
Inglês
Science News
New Research Advances Voice Security Technology
ScienceDaily (Mar. 11, 2010) — Most people are familiar with security technology that scans a person's handprint or eye for identification purposes. Now, thanks in part to research from North Carolina State University, we are closer to practical technology that can test someone's voice to confirm their identity.
"The big picture is speaker authentication by computer," says Dr. Robert Rodman, professor of computer science at NC State and co-author of a new paper on the subject. "The acoustic parameters of the voice are affected by the shape of the vocal tract, and different people have different vocal tracts," Rodman explains. "This new research will help improve the speed of speech authentication, without sacrificing accuracy."
Rodman explains that speech authentication could have a host of applications in this age of heightened security and mobile electronics. "Potential users of this technology include government, financial, health-care and telecommunications industries," Rodman says, "for applications ranging from preventing ID theft and fraud to data protection."
Current computer models that are used to compare acoustic profiles, effectively evaluating whether a speaker is who he says he is, may take several seconds or more to process the information, which is still too long for the technology to gain widespread acceptance. "In order for this technology to gain traction among users," Rodman says, "the response time needs to improve without increasing the error rate."
To address this problem, Rodman and his fellow researchers modified existing computer models to streamline the authentication process so that it operates more efficiently. "This is part of the evolution of speech authentication software," Rodman says, "and it moves us closer to making this technology a practical, secure tool."
The research was co-authored by NC State's Rodman; Rahim Saeidi, Tomi Kinnunen and Pasi Franti of the University of Joensuu in Finland; and Hamid Reza Sadegh Mohammadi of the Iranian Academic Center for Education, Culture & Research.
The research, "Joint Frame and Gaussian Selection for Text Independent Speaker Verification", will be presented at the International Conference on Acoustics, Speech and Signal Processing (ICASSP) in Dallas, March 14-19. The research was funded, in part, by the Centre for International Mobility.
NC State's Department of Computer Science is part of the university's College of Engineering.
http://www.sciencedaily.com/releases/2010/03/100308102202.htm
According to the text, all the following statements are true of Dr. Robert Rodman, EXCEPT
New Research Advances Voice Security Technology
ScienceDaily (Mar. 11, 2010) — Most people are familiar with security technology that scans a person's handprint or eye for identification purposes. Now, thanks in part to research from North Carolina State University, we are closer to practical technology that can test someone's voice to confirm their identity.
"The big picture is speaker authentication by computer," says Dr. Robert Rodman, professor of computer science at NC State and co-author of a new paper on the subject. "The acoustic parameters of the voice are affected by the shape of the vocal tract, and different people have different vocal tracts," Rodman explains. "This new research will help improve the speed of speech authentication, without sacrificing accuracy."
Rodman explains that speech authentication could have a host of applications in this age of heightened security and mobile electronics. "Potential users of this technology include government, financial, health-care and telecommunications industries," Rodman says, "for applications ranging from preventing ID theft and fraud to data protection."
Current computer models that are used to compare acoustic profiles, effectively evaluating whether a speaker is who he says he is, may take several seconds or more to process the information, which is still too long for the technology to gain widespread acceptance. "In order for this technology to gain traction among users," Rodman says, "the response time needs to improve without increasing the error rate."
To address this problem, Rodman and his fellow researchers modified existing computer models to streamline the authentication process so that it operates more efficiently. "This is part of the evolution of speech authentication software," Rodman says, "and it moves us closer to making this technology a practical, secure tool."
The research was co-authored by NC State's Rodman; Rahim Saeidi, Tomi Kinnunen and Pasi Franti of the University of Joensuu in Finland; and Hamid Reza Sadegh Mohammadi of the Iranian Academic Center for Education, Culture & Research.
The research, "Joint Frame and Gaussian Selection for Text Independent Speaker Verification", will be presented at the International Conference on Acoustics, Speech and Signal Processing (ICASSP) in Dallas, March 14-19. The research was funded, in part, by the Centre for International Mobility.
NC State's Department of Computer Science is part of the university's College of Engineering.
http://www.sciencedaily.com/releases/2010/03/100308102202.htm
According to the text, all the following statements are true of Dr. Robert Rodman, EXCEPT
Q1235648
Noções de Informática
Sobre arquivos PDF, analise as seguintes afirmativas e assinale com V as verdadeiras e F as falsas.
( ) Os Portable Document Format podem incluir videoclipes, áudio digital e modelos 3D. No CorelDRAW é possível importar arquivos PDF preservando a transparência, as camadas e os atributos de caracteres.
( ) Para otimizar a visualização de um documento PDF na Web, pode-se linearizar um arquivo PDF. A linearização de um arquivo acelera o tempo de processamento por meio do carregamento de uma página por vez.
( ) Ao gerar arquivos PDF no CorelDraw, é possível eliminar as variações de fontes em computadores diferentes exportando texto como curvas. Procedimento que aumenta a complexidade do arquivo e, consequentemente, o seu tamanho.
( ) Ao publicar um arquivo em PDF, é possível optar por exportar arquivos ASCII ou binários. O formato ASCII cria arquivos totalmente transportáveis para todas as plataformas. O formato binário cria arquivos menores, mas menos transportáveis, pois esse formato de arquivo é incompatível com algumas plataformas.
Assinale a alternativa que apresenta a sequência de letras CORRETA.
( ) Os Portable Document Format podem incluir videoclipes, áudio digital e modelos 3D. No CorelDRAW é possível importar arquivos PDF preservando a transparência, as camadas e os atributos de caracteres.
( ) Para otimizar a visualização de um documento PDF na Web, pode-se linearizar um arquivo PDF. A linearização de um arquivo acelera o tempo de processamento por meio do carregamento de uma página por vez.
( ) Ao gerar arquivos PDF no CorelDraw, é possível eliminar as variações de fontes em computadores diferentes exportando texto como curvas. Procedimento que aumenta a complexidade do arquivo e, consequentemente, o seu tamanho.
( ) Ao publicar um arquivo em PDF, é possível optar por exportar arquivos ASCII ou binários. O formato ASCII cria arquivos totalmente transportáveis para todas as plataformas. O formato binário cria arquivos menores, mas menos transportáveis, pois esse formato de arquivo é incompatível com algumas plataformas.
Assinale a alternativa que apresenta a sequência de letras CORRETA.
Q1229154
Matemática
Sobre gráficos vetoriais e bitmaps, assinale a afirmativa INCORRETA.
Q1226264
Direito Agrário
De acordo com as Normas Vigentes, julgue as assertivas abaixo: I. Lote é a menor parcela de terreno, resultante da divisão de uma gleba, destinada à construção de edificações, agricultura ou lazer. II. Logradouro é o espaço livre, inalienável, destinado à circulação pública de veículos e/ou de pedestres, reconhecido pela municipalidade, que lhe confere denominação oficial. III. Gleba é a porção de terreno rural ou urbano que foi objeto de loteamento ou desmembramento.
Q1222053
Português
Leia o período a seguir e marque a única alternativa correta:
“Quando chegam à universidade, os jovens se deparam com novos desafios”.
“Quando chegam à universidade, os jovens se deparam com novos desafios”.
Conheça nossos planos