Abstract
Since the speaker independent phoneme HMM based voice dialing system uses only the phoneme transcription of the input sentence, the storage space could be reduced greatly. However, the performance of the system is worse than that of the speaker dependent system due to the phoneme recognition errors generated when the speaker independent models are used. In order to solve this problem, a new method that jointly estimates the transformation vectors (bias) and transcriptions for the speaker adaptation is presented. The biases and transcriptions are estimated iteratively from the training data of each user with maximum likelihood approach to the stochastic matching using speaker independent phoneme models. Experimental result shows that the proposed method is superior to the conventional method using transcriptions only.
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