This study proposes two new methods for detailed modeling and transformation of the vocal tract spectrum and the pitch contour. The first method (selective pre-emphasis) relies on band-pass filtering to perform vocal tract transformation. The second method (segmental pitch contour model) focuses on a more detailed modeling of pitch contours. Both methods are utilized in the design of a voice co...

Obtaining a compact, information-rich representation of the speech signal is an important first step in ASR. A large majority of ASR systems use some form of cepstral coefficients for this purpose. Computation of these cepstral coefficients typically includes several of the following steps: (1) Highfrequency preemphasis, using an FIR filter of the form y(k) = x(k) ax(k-1), with a taking values ...

The GCI detection is a common problem in voice analysis used for voice transformation and synthesis. The proposed innovative idea is to use a glottal shape estimate and a standard lips radiation model instead of the common pre-emphasis when computing the vocal-tract filter estimate. The time-derivative glottal source is then computed from the division in frequency of the speech spectrum by the ...

This is a report summarising results from studies of true subglottal pressure, supraglottal pressure and speech wave data. We have derived co-variation patterns, which allow a prediction of intensity from subglottal pressure and F0, and conversely a prediction of a subglottal pressure contour from F0 and intensity. Of special interest is the significance of a mid-point in a speakers’ available ...

This document specifies a packetization scheme for encapsulating 12-bit nonlinear, 20-bit linear, and 24-bit linear audio data streams using the Real-time Transport Protocol (RTP). This document also specifies the format of a Session Description Protocol (SDP) parameter to indicate when audio data is preemphasized before sampling. The parameter may be used with other audio payload formats, in p...

Abstract Unfortunately, according to the United States of America Department of Education (2009), the mathematic achievement level for eighth grade students has continued to decline since the year of 1996. In an effort to improve achievement levels in the critical skill area of mathematics, researchers have suggested that immersion in mathematics at the Pre – K level is necessary, and that it i...

Instruction pre-execution is an effective way to prefetch data. We previously proposed an instruction pre-execution scheme, which we call two-step physical register deallocation (TSD). The TSD realizes pre-execution by exploiting the difference between the amount of instruction-level parallelism available with an unlimited number of physical registers and that available with an actual number of...