Title
A multi-pulse LPC speech codec using digital signal processors
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.
Year
DOI
Venue
1985
10.1109/ICASSP.1985.1168232
Acoustics, Speech, and Signal Processing, IEEE International Conference ICASSP '85.
Keywords
DocType
Volume
chip,digital signal processor,control systems,cross correlation,decoding,national electric code,linear predictive coding,digital signal processors
Conference
10
Citations 
PageRank 
References 
0
0.34
2
Authors
4
Name
Order
Citations
PageRank
Wake, Y.100.34
Tanaka, S.200.34
Ozawa, K.3656.63
Araseki, T.452.66