Interframe differential vector coding of line spectrum frequencies
Date
1993-04
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Source Title
IEEE International Conference on Acoustics, Speech and Signal Processing. Proceedings
Print ISSN
0736-7791
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Publisher
IEEE
Volume
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Pages
25 - 28
Language
English
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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 interframe 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 vector resulting from prediction is vector quantized.
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Keywords
Mathematical models , Poles and zeros , Polynomials , Root loci , Sampled data control systems , Signal filtering and prediction , Spectrum analysis , Speech recognition , Speech synthesis , Vectors , Vocoders , Interframe differential vector coding , Line spectrum frequencies , Linear predictive coding (LPC) filters , Speech coding