Low bit rate speech coder based on Gaussian adaptive wavelets
Shubha L. Kadambe, Pramila N. Srinivasan · Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE · 1995
A low bit rate speech coder based on Gaussian adaptive wavelets is described. This speech coder ameliorates the problem of using two different mother wavelets to model voiced and unvoiced sounds. In addition, it has been demonstrated in this paper that Gaussian adaptive wavelets are better suited to model both voiced and unvoiced sounds as compared to Morlet and Daubechies' wavelets. The bit rate and speech quality of this speech coder is compared with the speech coder based on Morlet wavelet. Experimental results using TIMIT speech database are discussed with examples.