Efficient shape coding algorithm by quadtree decomposition for MPEG-4
Chil-Cheang Ma, Mei‐Juan Chen · Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE · 2000
Due to rapid growth of video coding techniques, the object- oriented video compression is an important role in recent years. MPEG-4 visual is the first international standard allowing to transmit arbitrarily shaped video object. In this paper, we propose a new shape coding algorithm called quadtree-based binary shape coding (QTSC) algorithm. The proposed method is based on the simple characteristic of the quadtree decomposition to improve coding efficiency. Quadtree (QT) decomposition has been used as a part of image sequence compression algorithms. It is a simple technique used to obtain an image representation at different resolution levels. An improved quadtree shape coding (IQTSC) algorithm to further increase coding performance is also presented. We compare the proposed method with the bitmap-based and contour-based methods for MPEG-4. Simulation results show that the coding performance of the improved scheme is better than conventional shape coding methods. The proposed methods are shown to be simple, and efficient solutions and suitable for hardware implementation.