Temporal Scalable Coding For Dynamic Meshes

This paper presents the first implementation of temporal scalability in the ongoing standard for Video-based Dynamic Mesh Coding (V-DMC), a crucial enhancement that enables bitstream adaptation to diverse network conditions and device capabilities. While displacement and texture, two of the V-DMC’s sub-bitstreams, already benefit from existing video codec temporal scalability, the non-video basemesh sub-bitstream lacks this feature. To address this gap, we propose an adaptive coding structure designed for the basemesh. Moreover, we propose a novel cost function to adaptively select the frame type between intra-frame and inter-frame in this coding structure. Our experimental results demonstrate significant improvements in coding efficiency compared to the original V-DMC, i.e., the total BD-rates of D1, D2, Luma, Cb, and Cr averaged across all eight test sequences are -15.1%, -15.0%, 0.3%,-9.9%, and -8.4 %, respectively.