Modelling context dependency in acoustic-phonetic and lexical representations
HLT '91 Proceedings of the workshop on Speech and Natural Language
Applications of information theory to pattern recognition and the design of decision trees and trellises
Decision trees for phonological rules in continuous speech
ICASSP '91 Proceedings of the Acoustics, Speech, and Signal Processing, 1991. ICASSP-91., 1991 International Conference
French–German bilingual acoustic modeling for embedded voice driven applications
TSD'05 Proceedings of the 8th international conference on Text, Speech and Dialogue
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Many speech recognition systems today use a vector quantization stage in the initial processing of the speech signal to generate an integer value to represent a parameter vector derived from some short interval of speech. In most systems the vector quantizer is designed without regard to the phonetic context in which the vectors occur. However, it is well known that significant changes occur in the realization of many phones when they are uttered in the context of other phones. It would be worthwhile to use this information while designing and using the vector quantizer. In this paper we describe the design of a vector quantizer that takes into account the Variations in the vectors that results from the phonetic context in which the phones are realized. In this paper we will describe the procedure used to build the vector quantizer codebook and present experimental results.