Patent ID: 8155968
Filing Date: 2012-04-10
Classification: G10L

Abstract:
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 audio 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 based on the voice characteristic, the recommended distance range indicating a distance range of the user and the audio input module at which the S/N ratio exceeds the first threshold; and a display module that displays the recommended distance range and the current distance.