Patent ID: 6990248
Filing Date: 2006-01-24
Classification: G06T

Abstract:
1. A system for coding a sequence of segmented pictures defining successive partitions, each current picture being originally available in the form of mesh of blocks the nodes of which are located on high gradient points and each block being subdivided into two triangles, wherein said system comprises: (A) a projection circuit, for estimating on the basis of the mesh defined for a previous picture (T−1) a projected mesh made of polygons and corresponding to the current picture T; (B) a mesh coding circuit, for coding motion and texture associated to said projected mesh; (C) a texture error detection and coding circuit; wherein said mesh coding circuit comprises: (a) a mesh definition device, for associating to said projected mesh, mesh proposals including coarser meshes obtained by merging and finer meshes obtained by resegmentation; (b) a decision sub-assembly, for taking the mesh proposals of said mesh definition device and making a decision on which polygons will belong to a final projected mesh and which coding technique among a predetermined list will be used within each one of said polygons; (c) a coding sub-assembly, for coding said final projected mesh and the texture of each of said polygons belonging to said final projected mesh.