By Lawrence R. Rabiner

Creation to electronic Speech Processing offers the reader with a pragmatic creation to the big variety of significant recommendations that contain the sphere of electronic speech processing. It serves as a useful reference for college kids embarking on speech examine in addition to the skilled researcher already operating within the box, who can make the most of the booklet as a reference consultant.

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Extra resources for Introduction to Digital Speech Processing (Foundations and Trends in Signal Processing,)

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This part of the diagram represents the synthesis equation N −1 ∞ YrR [k]f [n − rR] ej(2πk/N )n . 9 involve first upsampling by R followed by linear filtering with f [n] (called the synthesis window). 10 Then, synthesis is achieved by modulation with ej(2πk/N )n , which up-shifts the lowpass interpolated channel signals back to their original frequency bands centered on frequencies (2πk/N ). The sum of the up-shifted signals is the synthesized output. There are many variations on the short-time Fourier analysis/synthesis paradigm.

Often the term pitch period is used for the fundamental period of the voiced speech signal even though its usage in this way is somewhat imprecise. 5 Auditory Masking The phenomenon of critical band auditory analysis can be explained intuitively in terms of vibrations of the basilar membrane. A related phenomenon, called masking, is also attributable to the mechanical vibrations of the basilar membrane. Masking occurs when one sound makes a second superimposed sound inaudible. Loud tones causing strong vibrations at a point on the basilar membrane can swamp out vibrations that occur nearby.

For creating nasal sounds like /M/, /N/, or /NG/, a side-branch tube, called the nasal tract, is connected to the main acoustic branch by the trapdoor action of the velum. This branch path radiates sound at the nostrils. The shape (variation of cross-section along the axis) of the vocal tract varies with time due to motions of the lips, jaw, tongue, and velum. 1, this type of model is a reasonable approximation for wavelengths of the sounds in speech. 1 in several ways. 1) Fig. 1 Schematic model of the vocal tract system.

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