A method and system checking a state of a peripheral without help of a special I/O module regardless of port types between the peripheral and a state-requiring device can be achieved by adding state information representing detailed state of the peripheral to an identification region of the peripheral having identification information identifying the peripheral, and transferring the identification region with the state information to the state-requiring device. The state of the peripheral is analyzed using the state information extracted from the identification region received by the state-requiring device.

 
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> Method and apparatus for controlling buffering of audio stream

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