A 600bps MELP-Based Speech Quantization Scheme for Underwater Acoustic Channels

Author

Di Gao ; Xiaoqun Zhao

Author_Institution

Sch. of Electron. & Inf. Eng., Tongji Univ., Shanghai, China

fYear

2013

fDate

21-23 June 2013

Firstpage

1983

Lastpage

1986

Abstract

The MELP is the U.S. Federal Standard operated at 2.4kbps, it could achieve equal to or better than the performance of the 4.8kbps CELP vocoder. However, for channels like underwater acoustic channel, the condition is very bad that even the 2.4kbps MELP data could not be transferred. A new 600 bps quantization method based on the MELP parameters is proposed. The new scheme contains methods like inter-frame prediction, linear interpolation and so on. Though the bit rate is only a quarter of the original MELP algorithm, the scheme could also synthesize a reconstruction speech which is understandable.

Keywords

interpolation; quantisation (signal); speech coding; underwater acoustic communication; vocoders; CELP vocoder; MELP; bit rate 2.4 kbit/s; bit rate 4.8 kbit/s; bit rate 600 bit/s; interframe prediction; linear interpolation; speech quantization scheme; speech reconstruction; underwater acoustic channels; Bit rate; Interpolation; Prediction algorithms; Quantization (signal); Speech; Speech coding; Underwater acoustics; MELP; underwater acoustic channel; vocoder;

fLanguage

English

Publisher

ieee

Conference_Titel

Computational and Information Sciences (ICCIS), 2013 Fifth International Conference on

Conference_Location

Shiyang

Type

conf

DOI

10.1109/ICCIS.2013.518

Filename

6643437