APPARATUS FOR CODING AND DECODING VIDEO AND METHOD THEREFOR

摘要

PURPOSE: An apparatus for coding and decoding video is provided to obtain information of diverse image qualities in accordance with a resolution change by structuring diversely subdivided bitstream after reproducing information having a basic image quality. CONSTITUTION: Input data is composed of a mask 1(101) providing information on a shape of an object and a video display terminal(VDT)(102) providing information on an internal texture of the object. Masks 1, 2, and 3 are not necessary in case of coding an entire rectangular screen. Inputted images are converted into images of a half size in breadth and length through a down sampling apparatus(103), and the mask 1(101) becomes a mask 2(104) to be compressed to information necessary for transmission in a shape coder 1(106). The shape coder 1(106) uses a scalable shape coding mode selected for a version 2 working draft of MPEG-4.