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Summary: 256 IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS FOR VIDEO TECHNOLOGY, VOL. 15, NO. 2, FEBRUARY 2005
Bit Allocation for Joint Source and Channel Coding
of Progressively Compressed 3-D Models
Ghassan Al-Regib, Yucel Altunbasak, Senior Member, IEEE, and Russell M. Mersereau, Fellow, IEEE
Abstract--This paper presents a joint source and channel coding
method for transmission of progressively compressed three-dimen-
sional (3-D) models where the bit budget is allocated optimally.
The proposed system uses the Compressed Progressive Mesh (CPM)
algorithm to produce a hierarchical bitstream representing dif-
ferent levels of detail (LODs). In addition to optimizing the trans-
mitted bitstream with respect to the channel characteristics, we
also choose the optimum combination of quantization and tessel-
lation to maximize the expected decoded model quality. That is,
given a 3-D mesh, a total bit budget ( ) and a channel packet-loss
rate ( ), we determine the optimum combination of: 1) the ge-
ometry coordinates quantizer step size ( -bit); 2) the number of
transmitted batches ( ); 3) the total number of channel coding bits
( ); and 4) the distribution of these channel coding bits among the
transmitted levels (CL). Experimental results show that, with our
unequal error protection approach that uses the proposed bit-allo-
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