Speech Coding
Mostrando 13-20 de 20 artigos, teses e dissertações.
-
13. ANÁLISE DE CODIFICADORES DE FORMA DE ONDA PARA SINAIS DE VOZ E DADOS / ANALYSIS OF WAVEFORM CODERS FOR SPEECH AND DATA SIGNALS
O trabalho examina o comportamento de Codificadores de forma de onda operando a 32,56 e 64kbit/s para transmissão digital de sinais de voz e de sinais de dados PSK-8 a 4800 bit/s e QAM-16 a 9600 bit/s. A partir de uma análise detalhada dos diversos sistemas, tanto em canal ideal como um canal ruidoso, é verificada a necessidade de se fazer uma identifica�
Publicado em: 1986
-
14. Research in speech communication.
Advances in digital speech processing are now supporting application and deployment of a variety of speech technologies for human/machine communication. In fact, new businesses are rapidly forming about these technologies. But these capabilities are of little use unless society can afford them. Happily, explosive advances in microelectronics over the past tw
-
15. Voice-processing technologies--their application in telecommunications.
As the telecommunications industry evolves over the next decade to provide the products and services that people will desire, several key technologies will become commonplace. Two of these, automatic speech recognition and text-to-speech synthesis, will provide users with more freedom on when, where, and how they access information. While these technologies
-
16. Controller design and consonantal contrast coding using a multi-finger tactual display1
This paper presents the design and evaluation of a new controller for a multi-finger tactual display in speech communication. A two-degree-of-freedom controller consisting of a feedback controller and a prefilter and its application in a consonant contrasting experiment are presented. The feedback controller provides stable, fast, and robust response of the
Acoustical Society of America.
-
17. Encoding for computation: Recognizing brief dynamical patterns by exploiting effects of weak rhythms on action-potential timing
Many stimuli have meaning only as patterns over time. Most auditory and many visual stimuli are of this nature and can be described as multidimensional, time-dependent vectors. A simple neuron can encode a single component of the vector in a firing rate. The addition of a small subthreshold oscillatory current perturbs the action-potential timing, encoding t
National Academy of Sciences.
-
18. Loudness Perception in the Domestic Cat: Reaction Time Estimates of Equal Loudness Contours and Recruitment Effects
The domestic cat is the primary physiological model of loudness coding and recruitment. At present, there are no published descriptions of loudness perception in this species. This study used a reaction time task to characterize loudness perception in six behaviorally trained cats. The psychophysical approach was based on the assumption that sounds of equal
Springer-Verlag.
-
19. FOXP2 Is Not a Major Susceptibility Gene for Autism or Specific Language Impairment
The FOXP2 gene, located on human 7q31 (at the SPCH1 locus), encodes a transcription factor containing a polyglutamine tract and a forkhead domain. FOXP2 is mutated in a severe monogenic form of speech and language impairment, segregating within a single large pedigree, and is also disrupted by a translocation in an isolated case. Several studies of autistic
The American Society of Human Genetics.
-
20. On cortical coding of vocal communication sounds in primates
Understanding how the brain processes vocal communication sounds is one of the most challenging problems in neuroscience. Our understanding of how the cortex accomplishes this unique task should greatly facilitate our understanding of cortical mechanisms in general. Perception of species-specific communication sounds is an important aspect of the audito
The National Academy of Sciences.