Abstract: A wireless earphone includes: a wireless transmitting/receiving unit for transmitting/receiving a signal to/from the portable terminal according to a short wireless communication scheme; a voice detecting unit for detecting a user voice signal with being inserted into an ear of the user; a signal processing unit for converting a short range wireless communication signal received through the wireless transmitting/receiving unit to an audio signal, eliminating noise and echo from a voice signal received through the voice detecting unit, converting the noise and echo eliminated voice signal to a short range wireless communication signal and transmitting the short range wireless communication signal; an output unit for outputting the audio signal received from the signal processing unit; and a power supplying unit for receiving power and being charged when the wireless stereo earphone is attached to the mobile terminal, and supplying the power to each element of the wireless earphone.

Abstract: Disclosed is an online music-data providing system via a Bluetooth car kit which comprises: a music-data providing server for providing music data through a network; a mobile communication system connected to the network; a mobile station for wirelessly accessing the mobile communication system and performing the Bluetooth protocol; and a Bluetooth car kit installed in a vehicle, having a Bluetooth function for performing the Bluetooth protocol, for performing short range radio links by the Bluetooth protocol to the mobile station, receiving the music data from the music-data-providing server through the mobile station, reproducing them, and outputting them. Since the music files distributed by the music-data-providing server are encoded, they are not transmitted or reproduced to other devices except the car kit. Further, the present invention provides various categories of contents in addition to the online music data distribution service through the car kit.

Abstract: Disclosed is an online music-data-providing system via a Bluetooth headset which comprises: a music-data-providing server for providing music data through a network; a mobile communication system connected to the network; a mobile station for wirelessly accessing the mobile communication system and performing the Bluetooth protocol; and a Bluetooth headset installed in a vehicle, having a Bluetooth function for performing the Bluetooth protocol, for performing short range radio links by he Bluetooth protocol to the mobile station, receiving the music data from the music-data-providing server through the mobile station, reproducing them, and outputting them. Therefore, since the music files distributed by the music-data-providing server are encoded, they may not be transmitted or reproduced to other devices except the headset. The present invention provides various categories of contents in addition to the online music data distribution service through the headset.