×

VOICE RECOGNITION APPARATUS AND METHOD FOR PERFORMING VOICE RECOGNITION

  • US 20090210227A1
  • Filed: 02/12/2009
  • Published: 08/20/2009
  • Est. Priority Date: 02/15/2008
  • Status: Active Grant
First Claim
Patent Images

1. A voice recognition apparatus comprising:

  • an audio input module that receives an audio input and outputs an audio signal, the audio input module having a gain being configured to be adjustable;

    a voice recognition module that detects a voice period, where a voice activity by a user is detected, in the audio signal and performs a voice recognition for the audio signal during the voice period;

    a first level measurement module that measures a voice level of the audio signal in the voice period and outputs the voice level;

    a second level measurement module that measures a noise level of the audio signal in a noise period and outputs the noise level, the noise period being a time period except the voice period;

    a first calculation module that calculates an S/N ratio that is a ratio of the voice level to the noise level;

    a distance measurement module that measures a current distance between the user and the voice input module;

    a first memory module that stores a first threshold corresponding to an S/N ratio at which the voice recognition module is capable to perform the voice recognition with a given recognition rate;

    a second memory module that stores a voice characteristic having a set of the voice level, the current distance and the gain, by which the voice recognition module has succeeded in performing the voice recognition;

    a second calculation module that calculates a recommended distance range for the current distance, in which being estimated that the S/N ratio exceeds the first threshold, based on the voice characteristic; and

    a display module that displays the recommended distance range and the current distance.

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