Audio output system and method for information processing terminal

An audio output method for an information processing device, comprising:

• determining whether a wireless transmission function is enabled in an operation mode;
• outputting, when the wireless transmission function is not enabled, an audio signal through an internal speaker of the information processing device;
• tuning, when the wireless transmission function is enabled, a transmission frequency for a transmitter of the information processing device to transmit an audio signal to an external speaker system;
• configuring an audio signal path to the transmitter;
• and
• transmitting the audio signal to the external speaker system through the transmission frequency via the transmitter.

A transmission frequency selection method for an information processing terminal, comprising:

• determining, when operating in an external speaker output mode, whether a frequency scan command is input;
• and
• searching, when the frequency scan command is input, a transmission frequency by scanning a predetermined frequency spectrum,
• wherein scanning a predetermined frequency spectrum comprises:
• transmitting a test signal through a frequency in the predetermined frequency spectrum;
• receiving a test reply signal in response to the test signal;
• comparing the test signal and the test reply signal;
• transmitting, when the test signal and the test reply signal are not identical, the test signal through a next frequency in the predetermined frequency spectrum;
• and
• setting, when the test signal and the test reply signal are identical, a selected frequency whereat the test signal and the test reply signal are identical as the transmission frequency.

An audio output apparatus comprising:

• a memory for storing an application program executing radio transmission, data generated in the audio output apparatus and received from external device, configuration information associated with the radio transmission, and application data generated while the application program operates;
• a display for presenting operation states of the application program through a liquid crystal display screen;
• a transmitter for transmitting an audio signal generated in the audio output apparatus to an external audio system;
• and
• a controller for controlling turn-on/off of a transmission function, an operation of the transmitter, switching an audio signal path between an internal speaker and the transmitter.