Two optimizations of the MPEG-4 FAMC standard for enhanced compression of animated 3D meshes

The MPEG-4 standard adopted a novel technology for compression of dynamic 3D meshes with constant connectivity and time-varying geometry, referred to as FAMC - frame-based animated mesh compression. In this paper, we propose two optimizations of the FAMC approach, aiming at improving the compression efficiency. The first one is based on a PCA (principal component analysis) decomposition of the motion compensation error residuals. The second improves the bi-orthogonal (4-2) wavelet coding approach supported by the standard, by introducing an optimal bit allocation procedure, combined with an adapted quantization of wavelet coefficients. Experimental results show that both optimizations lead to significant gains in compression rate (about 20-30%) at low bitrates.

[1]  James D. K. Kim,et al.  Interpolator data compression for MPEG-4 animation , 2004, IEEE Transactions on Circuits and Systems for Video Technology.

[2]  Francoise Preteux,et al.  A preliminary evaluation of 3D mesh animation coding techniques , 2005, SPIE Optics + Photonics.

[3]  N. Stefanoski,et al.  Scalable Linear Predictive Coding of Time-Consistent 3D Mesh Sequences , 2007, 2007 3DTV Conference.

[4]  Titus B. Zaharia,et al.  Multi-Chart Geometry Video: A Compact Representation for 3D Animations , 2006, Third International Symposium on 3D Data Processing, Visualization, and Transmission (3DPVT'06).

[5]  Adrian Hilton,et al.  A Rigid Transform Basis for Animation Compression and Level of Detail , 2005 .

[6]  Titus B. Zaharia,et al.  A skinning approach for dynamic 3D mesh compression , 2006, Comput. Animat. Virtual Worlds.

[7]  I. Daubechies,et al.  Wavelet Transforms That Map Integers to Integers , 1998 .

[8]  Sang Uk Lee,et al.  R-D optimized compression of 3-D mesh sequences based on principal component analysis , 2006, ACM-SE 44.

[9]  Marc Antonini,et al.  Motion-Based Geometry Compensation for DWT Compression of 3D mesh Sequences , 2007, 2007 IEEE International Conference on Image Processing.

[10]  Marc Antonini,et al.  An efficient bit allocation for compressing normal meshes with an error-driven quantization , 2005, Comput. Aided Geom. Des..

[11]  Craig Gotsman,et al.  Compression of soft-body animation sequences , 2004, Comput. Graph..