K. M. Shiva Prasad ¹, G. N. Kodanda Ramaiah ², M. B. Manjunatha ³

Affiliations
1 Electronics Engineering, Jain University, Bengaluru - 560069, Karnataka, IN
2 Department of ECE, K.E.C, Kuppam - 517425, Andhra Pradesh, IN
3 A.I.T., Tumkur - 572106, Karnataka, IN

Abstract

Speech synthesis is an artificial method of converting written text into machine generated speech. The Main Theme of this paper is to describe an overview of existing popular and advanced speech synthesizing techniques. Speech synthesis is a method of artificially generating the human speech from mathematical models and machines using some control parameters. The device which synthesizes is called as a synthesizer, the device which synthesizes is called as synthesizer and the synthesizer may be implemented as hardware or software. So for the research is not successful in generating a speech signal, usually researchers extract the speech parameters from the recorded speech and synthesize the original signal from it. A synthesizer can be viewed as Mathematical modeling of the vocal tract by extracting the acoustic/vocal features to produce the artificial generated speech output. The generated speech quality is described by its naturalness and intelligibility. The naturalness of synthesized speech gives an idea about how closely the generated output resembles the sounds produced by human speech production. Intelligibility describes how about the output can be understood by the listener after the perceiving it.

Keywords

HMM, Modelling, Speech Synthesis, TTS, Vocal Tract

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K. M. Shiva Prasad ¹, G. N. Kodanda Ramaiah ², M. B. Manjunatha ³

Affiliations
1 Electronics Engineering, Jain University, Bangalore – 560069, Karnataka,, IN
2 Department of ECE, KEC, Kuppam – 517425, Andhra Pradesh,, IN
3 A.I.T. Tumkuru – 572106, Karnataka,, IN

Abstract

Speech is the most natural and convenient way of human communication. The speech represents not only a sequence of steady states of some sounds which are abruptly changing from one to another or a sound signal which can be ignored after perceiving or hearing it. But human Speech is a unique signal which carries and conveys multiple levels of knowledge source, linguistic and non-linguistic information. Speech signals are the information bearing signals which are evolved as functions of a single independent variable like time. Speech is a complex acoustic wave resulted as output of speaker’s effort. Speech serves to communicate from speaker to one or more listeners. The typical sound is called phone and it is produced when a phoneme is articulated. Most of Indian languages have 20-50 phonemes which constitute an alphabet of sounds to describe the different words in that language. Generally the speech is composed of sentences made of words. Usually words are composed of phoneme sequences called syllables. Speech analysis plays a vital role in speech recognition and synthesis. Speech analysis is also known as feature extraction or as speech signal front ends.

Keywords

Feature Extraction, Front Ends, Human Communication, Speech

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