Title :
A 2.4 kbit/s MELP coder candidate for the new U.S. Federal Standard
Author :
McCree, Alan ; Truong, Kwan ; George, E. Bryan ; Barnwell, Thomas P. ; Viswanathan, Vishu
Author_Institution :
Personal Syst. Lab., Texas Instrum. Inc., Dallas, TX, USA
Abstract :
This paper describes our enhanced mixed excitation linear prediction (MELP) speech coder which is a candidate for the new U.S. Federal Standard at 2.4 kbits/s. The new coder is based on the MELP model, and it uses a number of enhancements as well as efficient quantization algorithms to improve performance while maintaining a low bit rate. In addition, the coder has been optimized for performance in acoustic background noise and in channel errors, as well as for efficient real-time implementation. Listening tests confirm that the enhanced 2.4 kbit/s MELP coder performs as well as the higher bit rate 4.8 kbit/s FS1016 CELP standard
Keywords :
code standards; linear predictive coding; quantisation (signal); speech coding; telecommunication standards; vector quantisation; 2.4 kbit/s; Federal Standard; LPC; MELP speech coder; MSVQ; USA; acoustic background noise; channel errors; efficient real-time implementation; listening tests; low bit rate; mixed excitation linear prediction; multistage vector quantiser; quantization algorithms; speech coding; Bit rate; Code standards; Filters; Fourier series; Linear predictive coding; Performance evaluation; Quantization; Signal processing algorithms; Speech synthesis; Vocoders;
Conference_Titel :
Acoustics, Speech, and Signal Processing, 1996. ICASSP-96. Conference Proceedings., 1996 IEEE International Conference on
Conference_Location :
Atlanta, GA
Print_ISBN :
0-7803-3192-3
DOI :
10.1109/ICASSP.1996.540325
