APPARATUS AND METHOD FOR VIDEO TRANSMISSION IN VIDEO CONFERENCING SYSTEM

An apparatus and a method for video transmission in a video conferencing system in which in order to efficiently transmit the speaker's picture in meetings, conferences, workshops and the like, the text data is separately transmitted by being separated from the speaker's picture. The apparatus for video transmission in a video conferencing system includes an A/D converter; a scaling part; a filtering and scaling part for filtering to remove noises from a text video data of an external source, and for scaling to expand or reduce its size to a proper one; a difference component extracting part for extracting difference components from the speaking video data and the text video data of the scaling part and the filtering and scaling part; a binary imaging part for setting a first threshold value to the extracted speaker's video data of the difference component extracting part to form a binary image; a filtering part for setting a second threshold value to the binary speaker's image of the binary imaging part, to carry out a filtering so as to assign a relevant region to the speaker's image; a compressing and encoding part for compressingly encoding the speaker's video data of the assigned region of the filtering part; and a first interfacing part for interfacing by connecting a communication network to the speaker's video data of the encoding part and to the text video data from the other external source.