Entertainment system of vehicle, method for connecting wireless, and processing sound using the same

A method of wirelessly connecting an entertainment system of a vehicle containing a control unit and a rear seat entertainment unit, the method comprising:

• wirelessly connecting the rear seat entertainment unit with a mobile terminal of a passenger when the mobile terminal is positioned within the vehicle, the mobile terminal being wirelessly connected with an audio output device of the passenger;
• connecting the control unit with the rear seat entertainment unit;
• requesting, by the control unit, that pairing information of the audio output device be transmitted to the rear seat entertainment unit;
• requesting, by the rear seat entertainment unit, the pairing information of the audio output device from the mobile terminal when the rear seat entertainment unit receives a request signal for the pairing information of the audio output device from the control unit;
• transmitting, by the rear seat entertainment unit, the pairing information of the audio output device to the control unit when the rear seat entertainment unit receives the pairing information of the audio output device from the mobile terminal;
• and
• controlling, by the control unit, the rear seat entertainment unit so as to automatically and wirelessly connect with the audio output device when the control unit receives the pairing information of the audio output device from the rear seat entertainment unit.

A method of processing sound in an entertainment system of a vehicle containing a control unit, a rear seat entertainment unit, and a sound processing unit, the method comprising:

• transmitting, by the control unit, a music source playback sound synchronization request signal to the sound processing unit when the rear seat entertainment unit is wirelessly connected with an audio output device of a passenger;
• receiving, by the control unit, information of a playback sound input volume value measured by the audio output device from the rear seat entertainment unit;
• transmitting, by the control unit, the received information of the playback sound input volume value to the sound processing unit;
• calculating, by the sound processing unit, the playback sound output adjustment value based on a playback sound output volume value outputted from a vehicle speaker and the playback sound input volume value measured by the audio output device when the sound processing unit receives the playback sound input volume value measured by the audio output device from the control unit;
• transmitting, by the sound processing unit, the calculated playback sound output adjustment value to the control unit;
• transmitting, by the control unit, an image signal to the rear seat entertainment unit;
• correcting, by the control unit, a music source playback sound corresponding to the image signal based on the received playback sound output adjustment value;
• and
• transmitting, by the control unit, the corrected music source playback sound to the audio output device via the rear seat entertainment unit.