Headphone wireless expansion device capable of switching among multiple targets and voice control method thereof

A headphone wireless expansion device for switching among multiple targets, connecting to a headphone comprising an audio data transmission unit and an audio capturing unit, the audio capturing unit capturing an unrecognized audio signal generated from a user's voice, the headphone wireless expansion device comprising:

• an audio information transmission unit connecting to the audio data transmission unit for receiving the unrecognized audio signal from the headphone;
• a control unit connecting to the audio information transmission unit for receiving the unrecognized audio signal, comprising:
• multi-target connection data including a plurality of device identification codes, a plurality of device authorization codes corresponding to a plurality of information devices respectively, and a plurality of audio tags corresponding to the device identification codes and the device authorization codes respectively;
• and
• an audio control mechanism for analyzing audio features of the unrecognized audio signal and searching the audio tag having audio features same as the audio features of the unrecognized audio signal to output the device identification code and the device authorization code corresponding to the identified audio tag;
• and
• a wireless communication unit connecting to the control unit for receiving the device identification code and the device authorization code corresponding to the identified audio tag to connect to the corresponding information device and receive audio data from the information device to transmit to the audio data transmission unit through the control unit for the headphone to play.

A voice control method for switching among multiple targets via a headphone wireless expansion device, comprising steps of:

• a) providing a headphone wireless expansion device comprising multi-target connection data, an audio control mechanism and a wireless communication unit, and connecting the headphone wireless expansion device to a headphone, the multi-target connection data including a plurality of device identification codes, a plurality of device authorization codes corresponding to a plurality of information devices respectively, and a plurality of audio tags corresponding to the device identification codes and the device authorization codes respectively;
• b) capturing an unrecognized audio signal generated from a user's voice by an audio capturing unit;
• c) analyzing audio features of the unrecognized audio signal by the audio control mechanism of the headphone wireless expansion device, and searching the audio tag having audio features same as the audio features of the unrecognized audio signal to output the device identification code and the device authorization code corresponding to the identified audio tag;
• and
• d) establishing a bidirectional wireless information connection between the headphone wireless expansion device and the information device by the wireless communication unit of the headphone wireless expansion device according to the device identification code and the device authorization code, and receiving audio data from the information device for playing.