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Speech recognition system having an interface to a host computer bus for direct access to the host memory

  • US 5,353,377 A
  • Filed: 08/17/1992
  • Issued: 10/04/1994
  • Est. Priority Date: 10/01/1991
  • Status: Expired due to Term
First Claim
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1. A speech recognition system for storing information on probability values of Markov models defining speech models of vocabulary words and information on a set of labels indicating phone types assignable to a micro period of time, for sequentially generating corresponding labels in response to an input speech to generate a label stream of said input speech, for accumulating said probability values of said Markov models on the basis of said speech models of said words and said label stream, and for performing speech recognition on the basis of the accumulated values, comprising:

  • a bus;

    a processor coupled to said bus;

    a main memory for said processor for storing said probability values of said Markov models accessibly to each of said labels, said main memory being coupled to said bus; and

    a signal processing unit coupled to said bus,said signal processing unit comprising;

    means for storing information on said set of labels;

    means for converting an input speech into said label stream on the basis of said information on the set of labels;

    means for fetching said probability values of a Markov model related to each of labels contained in said label stream by direct memory access transfer from said main memory;

    means for accumulating said probability values thus fetched for each of said vocabulary words; and

    means for determining one or more words to be the result of the recognition on the basis of accumulated probability values.

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