Interframe differential coding of line spectrum frequencies
Date
1994
Authors
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Source Title
IEEE Transactions on Speech and Audio Processing
Print ISSN
1063-6676
Electronic ISSN
Publisher
IEEE
Volume
2
Issue
2
Pages
350 - 352
Language
English
Type
Article
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Abstract
Line spectrum frequencies (LSF's) uniquely represent the linear predictive coding (LPC) filter of a speech frame. In many vocoders LSF's are used to encode the LPC parameters. In this paper, an inter-frame differential coding scheme is presented for the LSF's. The LSF's of the current speech frame are predicted by using both the LSF's of the previous frame and some of the LSF's of the current frame. Then, the difference resulting from prediction is quantized.
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Keywords
Acoustic signal processing, Predictive control systems, Signal encoding, Signal filtering and prediction, Speech analysis, Speech coding, Speech synthesis, Vocoders