Progress in deployment and further development of the NYNEX VoiceDialing/sup SM/ service

摘要

As was reported at IVTTA-94, the NYNEX VoiceDialing/sup SM/ service has been deployed, starting from the middle of 1993, in the NYNEX as well as other Bell Operating Companies regions. Since 1995, several substantial developments have taken place. One of them is the transition from a DTW based recognition algorithm implemented in hardware to a general purpose DSP implementation of a continuous density multi-gaussian mixture HMM based algorithm. As a result, it was possible to expand the service beyond speaker dependent name recognition. The paper highlights major efforts in this transition and provides a more detailed description of certain system components.