Abstract
The use of analysis-by-synthesis in determining the excitation signal has significantly advanced the state of the art in LPC vocoders [1,2]. The same principle has been adopted to obtain the excitation signal in the homomorphic vocoder, i.e., an exhaustive search procedure is used to determine the excitation by minimizing a perceptually weighted difference between the original speech and the output of the vocoder synthesizer [3]. This new homomorphic vocoder, called the vector excitation homomorphic vocoder, is a promising low bit rate vocoder, with performance that is far superior to that of a pitch-excited homomorphic vocoder [4] and fully comparable to that of vector-excited LPC vocoders such as code-excited or self-excited vocoders at a bit rate of 4800 bps.
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© 1991 Springer Science+Business Media New York
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Chung, J.H., Schafer, R.W. (1991). Vector Excitation Homomorphic Vocoder. In: Atal, B.S., Cuperman, V., Gersho, A. (eds) Advances in Speech Coding. The Springer International Series in Engineering and Computer Science, vol 114. Springer, Boston, MA. https://doi.org/10.1007/978-1-4615-3266-8_23
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DOI: https://doi.org/10.1007/978-1-4615-3266-8_23
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