Title :
Efficient coding of linear predictive coefficients for wideband speech
Author :
Magrath, A.J. ; Sandler, M.B.
Author_Institution :
Dept. of Electron. Eng., King´´s Coll., London, UK
fDate :
31 May-3 Jun 1998
Abstract :
This paper considers the coding of the linear predictive (LP) filter coefficients for applications where the highest quality natural-sounding speech reproduction is required. Bandwidths as high as 16 kHz and linear prediction orders of 38 are considered. To deal with the increase in model order, a method is proposed to code the trajectory of the line-spectral pair (LSP) representation of the LP coefficients. To improve the performance of the system, a hybrid scheme is proposed which utilises a combination of intra-frame LSP coding and trajectory-based coding. This scheme exploits the reduced sensitivity of the human auditory system to distortion at higher frequencies
Keywords :
broadband networks; filtering theory; least squares approximations; linear predictive coding; speech coding; distortion; efficient coding; human auditory system; hybrid scheme; intra-frame LSP coding; least squares algorithm; linear predictive coefficients; linear predictive filter coefficients; model order; natural-sounding speech reproduction; reduced sensitivity; trajectory-based coding; wideband speech; Algorithm design and analysis; Auditory system; Bandwidth; Educational institutions; Frequency; Humans; Nonlinear filters; Speech coding; Teleconferencing; Wideband;
Conference_Titel :
Circuits and Systems, 1998. ISCAS '98. Proceedings of the 1998 IEEE International Symposium on
Conference_Location :
Monterey, CA
Print_ISBN :
0-7803-4455-3
DOI :
10.1109/ISCAS.1998.698791
