一种有效的典型波形块内插方法

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Abstract A new kind of method of prototype waveforme extraction and blockwise interpolation in linear predictive residual(LPR) domain was suggested by aligning phase of Pitch-Cycle waveform(PCW) along the time axis one by one. This method may avoid the perceptual distortion due to discontinuities near boundaries of interpolated PCW. At the same time, it made the boundary selection of prototype waveform not too strict. a novel 2.4 kb/s LPC speech coding model was established based on thus extraction and blockwise interpolation of the prototype waveform(PW). The computer simulation results shown that the reconstructed speech quality with this model closed to CELP algorithm at 4.8 kb/s.

Key words： Speech coding Linear prediction Waveform interpolation Vector quantization

Received: 10 December 1997

PACS:

TN912.3

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	Bao Changchun

Cite this article:

Bao Changchun. An Efficient Blockwise Interpolation Algorithm of Prototype Waveform[J]. , 1999, 21(6): 743-751 .

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http://jeit.ie.ac.cn/EN/ OR http://jeit.ie.ac.cn/EN/Y1999/V21/I6/743