Patent ID: 8155358

Claim:
A method of simultaneously establishing a video-telephone call among multi-users using a virtual sound field wherein a screen of a portable terminal or a computer monitor is divided into a plurality of sections to allow a user to converse with a plurality of speakers during the video-telephone call, the method comprising: when voice information is generated from any one of the plurality of speakers, separating image information, the voice information and position information of the speaker whose voice information is generated; implementing the virtual sound field of the speaker using the separated position information of the speaker; and displaying on the screen a result obtained by adding the implemented virtual sound field and the separated image information of the speaker together, and outputting the virtual sound field of the speaker through a loudspeaker; wherein implementing the virtual sound field further comprises selecting a head related transfer function corresponding to the position information of the speaker from a predetermined head related transfer function (HRTF) table, and convolving the selected head related transfer function with a sound signal obtained from the voice information of the speaker to thereby implement the virtual sound field of the speaker.