Global and Local Moving Adaptive Image Coding Device and Method

摘要

The present invention relates to a video code, apparatus and method of a video telephone using a motion compensation type video compression technique adapted to local movement (segment unit movement) and global movement (object unit movement).;In order to encode a difference signal between a current video signal and a previous video signal in a frame unit having a plurality of segments, the global and local moving adaptive image coding according to the present invention first encodes the current video signal and the previous video signal, And extracts a motion vector group by estimating motion vectors of all the segments in the frame using a predetermined motion estimation algorithm as an input. Next, a moving region within the frame is extracted by using a predetermined moving region discrimination technique using the current video signal, the previous video signal, and the motion vector group as input, and the extracted number of moving regions is divided by a predetermined threshold value It is determined whether the movement generated in the frame is the global movement, which is the object-based movement, or the global movement, rather than the global movement. And generating the prediction signal by extracting global motion information, which is motion information of an object unit, with the previous image and the motion vector group as inputs, and moving the previous image by the global motion information, If it is determined that the motion is locally shifted, the previous image and the motion vector group are input, and each segment of the previous image is shifted by a motion vector of each segment to generate the prediction signal, and the prediction signal is encoded.