Title :
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
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;
Conference_Titel :
Acoustics, Speech and Signal Processing, 1998. Proceedings of the 1998 IEEE International Conference on
Conference_Location :
Seattle, WA
Print_ISBN :
0-7803-4428-6
DOI :
10.1109/ICASSP.1998.674391
