Interframe differential vector coding of line spectrum frequencies
Çetin, A. E.
IEEE International Conference on Acoustics, Speech and Signal Processing. Proceedings
Institute of Electrical and Electronics Engineers
25 - 28
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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.
Poles and zeros
Sampled data control systems
Signal filtering and prediction
Interframe differential vector coding
Line spectrum frequencies
Linear predictive coding (LPC) filters