Patent ID: 6469733
Filing Date: 2002-10-22
Classification: H04N

Abstract:
An apparatus for video transmission in a video conferencing system, comprising:a signal converting means for converting an analogue speaking video data of an external source to a digital speaking data; a scaling means for carrying out a scaling to expand or reduce the speaking video data of the signal converting means to a proper size; a filtering and scaling means for carrying out a filtering to remove noises from a text video data of an external source, and for carrying out a scaling to expand or reduce its size to a proper one; a difference component extracting means for extracting difference components from the speaking video data and the text video data of the scaling means and the filtering and scaling means; a binary imaging means for setting a first threshold value to the extracted speaker's video data of the difference component extracting means to form a binary image; a filtering means for setting a second threshold value to the binary speaker's image of the binary imaging means, to carry out a filtering so as to assign a relevant region to the speaker's image; an encoding means for compressingly encoding the speaker's video data of the assigned region of the filtering means; and a first interfacing means for carrying out an interfacing by connecting a communication network to the speaker's video data of the encoding means and to the text video data from the other external source.