TY - GEN
T1 - A low bit rate scalable CWI coder based on wavelet transform
AU - Wang, Jing
AU - Kuang, Jingming
AU - Zhao, Shenghui
PY - 2006
Y1 - 2006
N2 - This paper presents a scalable characteristic waveform interpolation (CWI) speech coder based on wavelet transform (WT) at low bit rate ranging from 1.8kbit/s to 3.6kbit/s. The characteristic waveform surface is decomposed into a series of reduced time resolution surfaces using B-spline biorthogonal linear phase Alter banks. The common coding parameters form the basic layer at 1.8kbit/s that can produce an acceptable speech quality. The different wavelet decomposition surfaces form different enhancement layers and improve the speech quality successively with efficient quantization. Subjective listening test showed that this scalable WT-CWI coder performs well at low bit rate.
AB - This paper presents a scalable characteristic waveform interpolation (CWI) speech coder based on wavelet transform (WT) at low bit rate ranging from 1.8kbit/s to 3.6kbit/s. The characteristic waveform surface is decomposed into a series of reduced time resolution surfaces using B-spline biorthogonal linear phase Alter banks. The common coding parameters form the basic layer at 1.8kbit/s that can produce an acceptable speech quality. The different wavelet decomposition surfaces form different enhancement layers and improve the speech quality successively with efficient quantization. Subjective listening test showed that this scalable WT-CWI coder performs well at low bit rate.
UR - http://www.scopus.com/inward/record.url?scp=34547607835&partnerID=8YFLogxK
U2 - 10.1109/ICCT.2006.341856
DO - 10.1109/ICCT.2006.341856
M3 - Conference contribution
AN - SCOPUS:34547607835
SN - 1424408016
SN - 9781424408016
T3 - International Conference on Communication Technology Proceedings, ICCT
BT - 2006 International Conference on Communication Technology, ICCT '06
T2 - 2006 International Conference on Communication Technology, ICCT '06
Y2 - 27 November 2006 through 30 November 2006
ER -