Variable frame rate speech coding using optimal interpolation

Sin-Horng Chen; Chii Jen Chung

doi:10.1109/26.293669

Variable frame rate speech coding using optimal interpolation

Sin-Horng Chen^*, Chii Jen Chung

^*Corresponding author for this work

National Chiao Tung University

Research output: Contribution to journal › Article › peer-review

1 Scopus citations

Abstract

A VFR LPC vocoder using optimal interpolation is presented in this paper. In the encoder, some representative frames of an utterance are selected for transmission. In the decoder, LPC parameters of all untransmitted frames are restored by optimal interpolation. Simulation results show that this coding scheme outperforms the conventional VFR vocoder using linear interpolation. By incorporating contour quantization of gain and pitch information, a low variable-rate LPC vocoder is realized. An informal listening test shows that very high intelligible reconstructed speech was obtained at an average data rate of 300 bps.

Original language	English
Pages (from-to)	2215-2219
Number of pages	5
Journal	IEEE Transactions on Communications
Volume	42
Issue number	6
DOIs	https://doi.org/10.1109/26.293669
State	Published - 1 Jun 1994

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title = "Variable frame rate speech coding using optimal interpolation",

abstract = "A VFR LPC vocoder using optimal interpolation is presented in this paper. In the encoder, some representative frames of an utterance are selected for transmission. In the decoder, LPC parameters of all untransmitted frames are restored by optimal interpolation. Simulation results show that this coding scheme outperforms the conventional VFR vocoder using linear interpolation. By incorporating contour quantization of gain and pitch information, a low variable-rate LPC vocoder is realized. An informal listening test shows that very high intelligible reconstructed speech was obtained at an average data rate of 300 bps.",

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