Title :
A 1.6 kb/s MELP coder for wireless communications
Author :
McCree, Alan ; De Martin, Juan Carlos
Author_Institution :
Corp. Res. & Dev., Texas Instrum. Inc., Dallas, TX, USA
Abstract :
This paper describes our new mixed excitation linear predictive (MELP) coder designed for wireless applications. This new coder, through algorithmic improvements and enhanced quantization techniques, produces better speech quality at 1.6 kb/s than the new U.S. Federal Standard MELP coder at 2.4 kb/s. A key feature of the coder is a novel line spectral frequencies (LSF) quantization scheme, requiring only 20 bits per frame. With channel coding (using convolutional codes), the new MELP coder at 3.1 kb/s is capable of maintaining good speech quality even in very degraded channels
Keywords :
channel coding; convolutional codes; linear predictive coding; quantisation (signal); spectral analysis; speech coding; vocoders; 1.6 kb/s MELP coder; 1.6 kbit/s; channel coding; degraded channels; line spectral frequencies quantization scheme; mixed excitation linear predictive coder; quantization techniques; speech quality; wireless communications; Acoustic noise; Background noise; Bit rate; Channel coding; Code standards; Frequency; Quantization; Research and development; Speech; Wireless communication;
Conference_Titel :
Speech Coding For Telecommunications Proceeding, 1997, 1997 IEEE Workshop on
Conference_Location :
Pocono Manor, PA
Print_ISBN :
0-7803-4073-6
DOI :
10.1109/SCFT.1997.623877
