A 13.0 kbit/s wideband speech codec based on SB-ACELP

Author

Schnitzler, Jürgen

Author_Institution

Inst. of Commun. Syst. & Data Process., Tech. Hochschule Aachen, Germany

Volume

1

fYear

1998

fDate

12-15 May 1998

Firstpage

157

Abstract

This paper describes a wideband (7 kHz) speech compression scheme operating at a bit rate of 13.0 kbit/s, i.e. 0.8 bit per sample. We apply a split-band (SB) technique, where the 0-6 kHz band is critically subsampled and coded by an ACELP approach. The high frequency signal components (6-7 kHz) are generated by an improved high-frequency-resynthesis (HFR) at the decoder such that no additional information has to be transmitted. In informal listening tests, the subjective speech quality was rated to be comparable to the CCITT G.722 wideband codec at 48 kbit/s

Keywords

adaptive codes; data compression; decoding; linear predictive coding; signal sampling; speech codecs; speech coding; speech intelligibility; speech synthesis; 0 to 6 kHz; 13 kbit/s; 48 kbit/s; 6 to 7 kHz; 7 kHz; CCITT G.722; SB-ACELP; bit rate; critically subsampled band; decoder; high frequency signal components; high-frequency-resynthesis; informal listening tests; speech compression; split-band technique; subjective speech quality; wideband speech codec; Bandwidth; Bit rate; Communications technology; Data processing; Decoding; Frequency; Speech codecs; Speech coding; Speech processing; Wideband;

fLanguage

English

Publisher

ieee

Conference_Titel

Acoustics, Speech and Signal Processing, 1998. Proceedings of the 1998 IEEE International Conference on

Conference_Location

Seattle, WA

ISSN

1520-6149

Print_ISBN

0-7803-4428-6

Type

conf

DOI

10.1109/ICASSP.1998.674391

Filename

674391