Title :
Multiband excitation vocoder
Author :
Griffin, Daniel W. ; Lim, J.S.
Author_Institution :
Dept. Of Electr. Eng. & Comput. Sci., MIT, Cambridge, MA, USA
Abstract :
A speech model, referred to as the multiband excitation model, is presented. In this model the band around each harmonic of the fundamental frequency is declared voiced or unvoiced. Estimation methods for the parameters of the model are developed and methods to synthesize speech from the model parameters are described. To illustrate a potential application of the speech model, an 8 kb/s vocoder is developed and its performance is evaluated. Both informal listening and intelligibility tests show that the vocoder has very good performance both in speech quality and intelligibility, particularly for noisy speech.<>
Keywords :
noise; speech analysis and processing; speech synthesis; vocoders; 8 kbits/s; estimation method; fundamental frequency; harmonic; intelligibility tests; listening tests; multiband excitation model; noisy speech; speech intelligibility; speech model; speech quality; speech synthesis; vocoder; Degradation; Frequency domain analysis; Parameter estimation; Signal synthesis; Speech analysis; Speech enhancement; Speech processing; Speech synthesis; Testing; Vocoders;
Journal_Title :
Acoustics, Speech and Signal Processing, IEEE Transactions on
