Apparatus and method for controlling audio output, and mobile terminal system using the same

A method for controlling an audio output, the method comprising:

• receiving an audio frame;
• determining whether an audio signal is included in the audio frame;
• setting a power voltage provided to an audio out port according to whether the audio signal is included in the audio frame;
• setting a gain of the audio out port according to whether the audio signal is included in the audio frame;
• determining the audio frame as a first silent section if the audio frame is a No Frame, the No Frame excluding an audio signal, and a prior audio frame received prior to the audio frame is a Good Frame, the Good Frame including an audio signal;
• determining the audio frame as a second silent section if the audio frame is a No Frame and the prior audio frame received prior to the audio frame is a No Frame;
• and
• determining the audio frame as a sound section if the audio frame is a Good Frame,
• wherein the audio out port is set differently for each of the first silent section, the second silent section, and the sound section.

A mobile terminal, comprising:

• a wireless transceiver to transceive wireless data;
• an audio unit to output, through an audio out port, an audio frame among the wireless data;
• and
• an audio output controlling unit to control a power voltage of the audio out port according to whether an audio signal is included in the audio frame, and to control a gain of the audio out port according to whether the audio signal is included in the audio frame.

An apparatus to control an audio output, comprising:

• a section determining unit to receive an audio frame and to determine whether an audio signal is included in an audio frame, the audio frame comprising a first audio frame and a second audio frame adjacent to the first audio frame;
• and
• a power controlling unit to set a power voltage provided to an audio out port according to whether the audio signal is included in the audio frame;
• and
• a gain controlling unit to control a gain of the audio out port according to whether the audio signal is included in the first audio frame and the second audio frame,
• wherein the gain controlling unit sets the gain of the audio out port to a first gain if the audio signal is included in the second audio frame, and sets the gain of the audio out port to a second gain if the audio signal is excluded from the second audio frame and the audio signal is excluded from the first audio frame.