Abstract:
A method for outputting audio data through an external device while preventing the generation of noise, and a portable terminal for the same are provided. The method for outputting audio data through the external device by the portable terminal includes identifying a connection voltage applied to a connection resistor included in the external device when a connection of the portable terminal to the external device is sensed, identifying a device code corresponding to the connection voltage, determining whether the external device is an audio output device according to the device code, and connecting a Universal Serial Bus (USB) interface, which is to be connected to the external device, to a ground (GND) for audio output if the external device is the audio output device.
Abstract:
An audio device connected to an electronic device is provided. The audio device connected to an electronic device includes an audio side connector comprising a microphone terminal that outputs a microphone signal to the electronic device, at least one audio terminal that receives an audio signal from the electronic device, an active noise cancelling (ANC) terminal, and a ground terminal, an ANC block that is driven by power input from the electronic device to remove noise around the audio device, an ANC power source unit that is provided in the electronic device and applies power input via the ANC terminal to the ANC block as drive power, and an on/off switch unit that controls the ANC power source unit, wherein the ANC terminal is included in any one of the areas of the microphone terminal, the audio terminal, and the ground terminal.
Abstract:
A method of operating an electronic device is provided. The method includes detecting a knock on a predetermined area of the electronic device, analyzing a pattern of the detected knock, and performing a function associated with the analyzed pattern.