Microphone device with adjustable aiming angle and voice recognition system and voice recognition method using the same

A voice recognition system, comprising:

• a calling unit configured to receive a start intention of the voice recognition system and generate a system start signal;
• an image recognition unit configured to detect an image of a user;
• a microphone device including a plurality of microphones configured to detect a voice of the user;
• and
• a controller configured to receive the system start signal from the calling unit to generate a system activation signal, transmit the system activation signal to the image recognition unit and the microphone device to activate the voice recognition system, receive the image of the user from the image recognition unit in an active state of the voice recognition system to extract a skeleton of the user from the image of the user, estimate an utterance point of the user on the skeleton of the user, determine the microphone corresponding to the estimated utterance point, calculate a movement amount to allow the corresponding microphone to be directed to the utterance point, and move the corresponding microphone by the movement amount.

A voice recognition method, comprising:

• generating a system start signal, by a calling unit which receives a start intention of a voice recognition system;
• generating a system activation signal by receiving the system start signal from the calling unit, by a controller;
• activating the voice recognition system by the system activation signal, by the controller;
• extracting a skeleton of a user by receiving an image of the user in an active state of the voice recognition system, by the controller;
• estimating an utterance point of the user on the skeleton of the user, by the controller;
• determining a microphone corresponding to the estimated utterance point, among a plurality of microphones included in a microphone device, by the controller;
• calculating a movement amount to allow the corresponding microphone to be directed to the utterance point, by the controller;
• and
• moving the corresponding microphone by the movement amount, by the controller.