Communication device

1. A communication device comprising:

a first communication interface configured to transmit audio data to a first counterpart device via a first wireless communication according to a first communication method using identification information of the first counterpart device, the audio data being sent to be output from the first counterpart device;

a second communication interface configured to execute a second wireless communication with a second counterpart device according to a second communication method in which the second wireless communication is established if the second counterpart device is within a predetermined distance;

an identification information receiver configured to receive identification information unique to the second counterpart device from the second counterpart device by the second wireless communication; and

a communication controller configured to stop the first wireless communication and to start the second wireless communication when the identification information receiver receives the identification information unique to the second counterpart device while the first communication interface is performing the first wireless communication with the first counterpart device, to thereby switch transmitting the audio data from the first counterpart device to the second counterpart device.

2. The device of claim 1 further comprising a priority setting module configured to set priority ranks of communication devices as audio data transmission destinations,

wherein the communication controller is configured to disconnect the first wireless communication with a counterpart device whose priority rank is set substantially low by the setting module when the first communication interface is transmitting the audio data to a plurality of counterpart devices.

3. The device of claim 2 , wherein the communication controller is configured to determine whether the first communication interface is able to transmit audio data to the second counterpart device, and to stop the audio data transmission to a communication device whose priority rank is set substantially low by the setting module when determined that the first communication interface is unable to transmit audio data to the second counterpart device when determined that the identification information of the second counterpart device is different from the identification information of any of the plural other communication devices.

4. The device of claim 3 , wherein the setting module is configured to assign a substantially low priority rank to a counterpart device comprising a substantially small number of first wireless communications with the first communication interface.

5. The device of claim 3 , wherein the setting module is configured to assign substantially low priority rank to a communication device comprising a substantially short accumulated time of first wireless communications with the first communication interface.

6. The device of claim 1 , wherein the first communication interface is configured to transmit a sequence of audio data in order of reproduction, and

wherein the communication controller is configured to transmit a portion of the sequence of audio data after a position corresponding to a time point of the stop of transmission of the audio data sequence, in order, to the second counterpart device.

7. A communication device comprising:

a first communication interface configured to transmit audio data to a first counterpart device by a first wireless communication according to a first communication method using identification information of the communication device and the first counterpart device, the audio data being sent to be output from the first counterpart device;

a second communication interface configured to execute a second wireless communication with a second counterpart device according to a second communication method comprising a second communication distance shorter than a first communication distance of the first communication method when the second counterpart device is within the second communication distance of the second communication method;

an identification information receiver configured to receive identification information unique to the second counterpart device from the second counterpart device by the second wireless communication; and

a communication controller configured to stop the first wireless communication and to start the second wireless communication when the identification information receiver receives the identification information unique to the second counterpart device while the first communication interface is performing the first wireless communication with the first counterpart device, to thereby switch transmitting the audio data from the first counterpart device to the second counterpart device.

8. The device of claim 1 , wherein the first communication interface is configured to transmit to the second counterpart device the audio data starting from a position in the audio data that corresponds to a time point when the controller stops the first wireless communication with the first counterpart device.

9. The device of claim 1 , wherein the first communication interface is configured to transmit to the second counterpart device the audio data starting from a position in the audio data that corresponds to a time point when an audio output of the first counterpart device is stopped.

10. The device of claim 7 , wherein the first communication interface is configured to transmit to the second counterpart device the audio data starting from a position in the audio data that corresponds to a time point when the controller stops the first wireless communication with the first counterpart device.

11. The device of claim 7 , wherein the first communication interface is configured to transmit to the second counterpart device the audio data starting from a position in the audio data that corresponds to a time point when an audio output of the first counterpart device is stopped.