×

Knowledge-based speech recognition system and methods having frame length computed based upon estimated pitch period of vocalic intervals

  • US 5,799,276 A
  • Filed: 11/07/1995
  • Issued: 08/25/1998
  • Est. Priority Date: 11/07/1995
  • Status: Expired due to Term
First Claim
Patent Images

1. A knowledge-based speech recognition system for recognizing an input speech signal comprising vocalic and non-vocalic intervals, each of the vocalic intervals having a pitch period, the system comprising:

  • means for capturing the input speech signal;

    means for segmenting the input speech signal into a series of segments including vocalic intervals and non-vocalic intervals, the vocalic intervals having a frame length computed based on an estimation of the pitch period of the vocalic intervals of the input speech signal;

    means for characterizing the series of segments based upon acoustic events detected within the input speech signal to obtain an acoustic feature vector;

    means for storing a dictionary having a multiplicity of words, each one of the multiplicity of words described by a phonetic transcription and at least one acoustic event transcription; and

    means for selecting a word choice by comparing the acoustic feature vector to the acoustic event transcriptions of the multiplicity of words.

View all claims
  • 6 Assignments
Timeline View
Assignment View
    ×
    ×