Using super resolution pitch in waveform speech coders
- 1 January 1991
- conference paper
- Published by Institute of Electrical and Electronics Engineers (IEEE)
- p. 633-636 vol. 1
- https://doi.org/10.1109/icassp.1991.150419
Abstract
The author presents an efficient exploitation of a super resolution pitch estimate in waveform speech coders such as LPC (linear predictive coding), CELP (code-excited linear prediction), and TDHS. Despite the compression/quality gain afforded with using super resolution pitch, the computational resources required to interpolate the speech signal to a much finer resolution are significant and therefore practical use is limited to a rather moderate resolution increase (factor of *2 is typical). One of the main contributions of this work is the ability to conserve computational resources by using a hybrid signal interpolation scheme composed of a second-order digital IIR (infinite impulse response) filter in tandem with a continuous linear interpolator which can be discretized to any desirable time resolution and thus take advantage of a super resolution pitch estimate.Keywords
This publication has 5 references indexed in Scilit:
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