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Shimmer, Jitter and Complexity Perturbation

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Epoch Synchronous Overlap Add (ESOLA)

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Abstract

Normal human voice is not perfectly periodic, it is said to be quasi-periodic. Two successive pitch cycles do not produce exactly the same pressure waves. The variations are random in nature and occur for pitch, amplitude and complexity, referred to as jitter, shimmer and complexity perturbations respectively. The perceptual manifestation of these is the quality of sound. The excess of these makes speech harsh and absence of them produces a mechanical unnatural timbre. The study for finding out the values of shimmer, jitter and CP in the natural speech is thus necessary to make the synthesized speech signal to sound more natural. This chapter includes a comprehensive study of these carried out for Bangla. The goal of the studies in this chapter is to get the optimum values of these three parameters so that after inclusion of these values in the synthesized speech would increase the quality particularly naturalness. The signals of nonsense utterances, in adequate number, in CVC form are collected from the native SCB female speaker, whose voice is to be used for speech synthesis.

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Authors and Affiliations

  1. Society for Natural Language Technology Research (SNLTR), Kolkata, West Bengal, India

    Asoke Kumar Datta

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  1. Asoke Kumar Datta
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Datta, A.K. (2018). Shimmer, Jitter and Complexity Perturbation. In: Epoch Synchronous Overlap Add (ESOLA). Signals and Communication Technology. Springer, Singapore. https://doi.org/10.1007/978-981-10-7016-7_6

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  • DOI: https://doi.org/10.1007/978-981-10-7016-7_6

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  • Publisher Name: Springer, Singapore

  • Print ISBN: 978-981-10-7015-0

  • Online ISBN: 978-981-10-7016-7

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