Abstract: A wearable electronic device is provided. The electronic device includes a processor operatively connected to a wireless communication circuit, a first audio mixer, a second audio mixer, a first audio output interface, a second audio output interface, and a speaker, the processor being configured to detect output of a plurality of audio signals including a first audio signal having a first property, transmit the first audio signal having the first property to the first audio mixer, transmit remaining audio signals to the second audio mixer, transmit the first audio signal to the first audio output interface to output the first audio signal through the speaker, synthesize the remaining audio signals into a second audio signal using the second audio mixer, and transmit the synthesized second audio signal to the second audio output interface to output the second audio signal through the external device.

Abstract: Provided is a three-dimensional (3D) image information transmitting system and method based on difference information. A 3D image information transmitting apparatus in the 3D image information transmitting system may include a difference information extractor to extract difference information by comparing a second composite texture image obtained by generating a composite of a first texture image and depth information with a second original texture image, and an image information transmitting unit to transmit 3D image information including the first texture image, the depth information, and the difference information.

Abstract: A gaze position tracking method and apparatus for simply mapping one's gaze position on a monitor screen are provided. The gaze position tracking apparatus includes an image capturing module, and an image processing module. The image capturing module illuminates infrared rays to a user's eyes, reflects an illuminated eye image at 45°, and captures the 45° reflected eye image. The image processing module obtains a pupil center point of the illuminated eye image by performing a predetermined algorithm, and maps the pupil center point on a display plane of a display device through a predetermined transform function.