Apparatus and Method for Contour Coding Mode Determination in Vertex-based Shape Information Coding Method

摘要

1. TECHNICAL FIELD OF THE INVENTION;Vertex-based Shape Information Coding Method;2. The technical problem to be solved by the invention;In the conventional vertex-based shape information coding method, all points are encoded as vertices even when the contour spans the VOP boundary.;3. Summary of Solution to Invention;Lossy / lossless encoding flag determining means (10) for determining whether to lose / losslessly encode the formed shape information; Area display means 20 for dividing the shape information through the loss / lossless encoding flag determination means 10 by the background and the empty area inside the object and displaying respective areas; Contour extracting means 30 for extracting an outline of the outer area of each region extracted by the region display means 20; Vertex extraction means for determining the encoding mode of the contour information extracted by the contour extraction means 30 and extracting the vertices to be encoded from the contour information according to the loss / lossless encoding flag transmitted from the lossy / lossless encoding flag determination means 10. 40; Initial vertex encoding means (50) for encoding an initial vertex among vertices extracted from the vertex extracting means (40); A vertex encoding means 60 for encoding the vertices output from the initial vertex encoding means 50 by an encoding method corresponding to the encoding mode determined by the vertex extraction means 40, wherein the extracted vertices are lost / lossless. The encoding mode is determined according to the encoding method, vertices are encoded by varying the encoding method according to the determined encoding mode, and the determined encoding mode is transmitted to the receiving end.;4. Important uses of the invention;It is applied to the vertex-based shape information loss / lossless coding scheme for efficient compression coding of contours of binary masks.