Fourth European Conference on Speech Communication and Technology

Madrid, Spain
September 18-21, 1995

Improved Transient Representation and Quantization for Sinusoidal Speech Coders

M. S. Torres-Guijarro (2), F. J. Casajus-Quiros (1)

(1) ETSI Telecomunicacion-UPM, Ciudad Universitaria, Madrid, Spain
(2) ETSI Telecomunicacion-Universidad de Valladolid, Spain

In this contribution we propose an improvement of the multiband excitation vococoder on the basis of preserving temporal and spectral features of transients. Proper representation of unvoiced-voiced transitions is achieved by means of reliable detection of the point where harmonics are born and application of specific analysis and synthesis procedures for the frames placed before and after this point. Description of temporal features requires the definition of new parameters, their extraction and quantization having been studied. Additional methods for parameter reduction and quantization will also be addressed:

Full Paper

Bibliographic reference.  Torres-Guijarro, M. S. / Casajus-Quiros, F. J. (1995): "Improved transient representation and quantization for sinusoidal speech coders", In EUROSPEECH-1995, 681-684.