A High-Efficiency and Low-Complexity SKIP Type for Base Mesh Coding in V-DMC

Video-based Dynamic Mesh Coding (V-DMC) is an emerging standard for dynamic mesh compression, where the original meshes are decimated into simplified meshes called base meshes. This paper introduces a novel SKIP type for base mesh coding in V-DMC, complementing the existing INTRA and INTER types. When the SKIP type is used in base mesh coding, it directly copies the reconstructed base mesh from the reference frame, eliminating the need for additional data coding. Thus, the reconstructed base mesh in the current frame is identical to that in the reference frame. This significantly reduces the bit rate and decoding time for base meshes. Additionally, this paper employs a Lagrangian cost function using a linear model for bit estimation of INTRA type and L1 norms for distortion approximation of SKIP type to enable the encoder to select the best type for base meshes. Experimental results demonstrate superior BD-rate performance and significantly reduced decoding time for base meshes using the SKIP type, particularly in sequences with minimal object movements.