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

fYear

1997

fDate

7-10 Sep 1997

Firstpage

23

Lastpage

24

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Speech Coding For Telecommunications Proceeding, 1997, 1997 IEEE Workshop on

Conference_Location

Pocono Manor, PA

Print_ISBN

0-7803-4073-6

Type

conf

DOI

10.1109/SCFT.1997.623877

Filename

623877