Optimization Strategy for 3D Mesh Displacement Coding in the V-DMC Standard

Recent years have witnessed significant advance-ments in 3D model capture, modeling, and rendering technolo-gies, propelling 3D mesh to the forefront as an effective representation of 3D models across various platforms and industries. As the quest for enhanced 3D mesh accuracy intensifies, the volume and complexity of 3D mesh data have escalated, challenging the storage and transmission of 3D meshes. In response, the Moving Pictures Experts Group (MPEG) has established the Video-based Dynamic Mesh Compression Standard (V-DMC), wherein displacement data serves as a crucial component of mesh geometry. Following transformation and quantization, a substantial portion of this data comprises zero values, which hampers encoding efficiency. This paper presents a detailed analysis of the displacement data coding process within the V-DMC codec framework and introduces an innovative zero-detection-based optimization algorithm for displacement encoding. This algorithm selectively encodes critical displacement data for transmission, seamlessly integrating with the V-DMC framework to enhance BD-Rate performance and simplify codec complexity.