×

Apparatus and method for speech recognition in the presence of unnatural speech effects

  • US 5,742,928 A
  • Filed: 10/26/1995
  • Issued: 04/21/1998
  • Est. Priority Date: 10/28/1994
  • Status: Expired due to Fees
First Claim
Patent Images

1. A speech recognition apparatus comprising:

  • an acoustic analyzer for analyzing an input speech signal of unnatural speech and extracting a time-series feature vector from said input speech signal;

    a normal speech model memory for storing a normal speech model learned based on normal speech data;

    an acoustic-phonetic variability model memory for storing a plurality of acoustic-phonetic variability models, each representing an acoustic-phonetic change of spectrum caused by unnatural speech; and

    speech recognition means for generating an unnatural speech model based on said normal speech model and at least one of said plurality of acoustic-phonetic variability models corresponding to another of said normal speech models, for recognizing said input speech signal of unnatural speech based on said time-series feature vector and said unnatural speech model, and for outputting a recognition result.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×