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Rate-distortion optimized compression and view-dependent transmission of 3-D normal meshes

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4 Author(s)
Jae-Young Sim ; Sch. of Electr. Eng. & Comput. Sci., Seoul Nat. Univ., South Korea ; Chang-Su Kim ; Kuo, C.-C.J. ; Sang-Uk Lee

A unified approach to rate-distortion (R-D) optimized compression and view-dependent transmission of three-dimensional (3-D) normal meshes is investigated in this work. A normal mesh is partitioned into several segments, which are then encoded independently. The bitstream of each segment is truncated optimally using a geometry distortion model based on the subdivision hierarchy. It is shown that the proposed compression algorithm yields a higher coding gain than the conventional algorithm. Moreover, to facilitate interactive transmission of 3-D data according to a client's viewing position, the server can allocate an adaptive bitrate to each segment based on its visibility priority. Simulation results demonstrate that the view-dependent transmission technique can reduce the bandwidth requirement considerably, while maintaining a good visual quality.

Published in:

Circuits and Systems for Video Technology, IEEE Transactions on  (Volume:15 ,  Issue: 7 )

Date of Publication:

July 2005

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