A multi-pulse LPC speech codec using digital signal processors
- 23 March 2005
- conference paper
- Published by Institute of Electrical and Electronics Engineers (IEEE)
- Vol. 10, 1429-1432
- https://doi.org/10.1109/icassp.1985.1168232
Abstract
A full-duplex 16 or 9.6 k bits/sec speech codec based on the multi-pulse excited LPC coding technique has been developed. Cross-correlation analysis was used for the pulse search method. The codec was implemented by using five NEC 7720 Digital Signal Processor LSI chips ; four DSPs for the coder and one DSP for the decoder. A general purpose microprocessor was also used for system control. Reconstructed speech was quite natural and almost undiscernible from original speech at 16 k bits/sec and still quite good at 9.6 k bits/sec. Signal to noise power ratio for a sine wave signal was 30 dB at 16 k bits/sec.Keywords
This publication has 1 reference indexed in Scilit:
- A 16kbps APC codec using digital signal processorsPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2005