An unequal error protection method for progressively transmitted 3D models
An unequal error protection method for progressively transmitted 3D models
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DOI：
10.1109/tmm.2005.850981
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发表时间：
2005-08
影响因子：
7.3
通讯作者：
G. Al-Regib;Y. Altunbasak;J. Rossignac
中科院分区：
文献类型：
--
作者：
G. Al-Regib;Y. Altunbasak;J. Rossignac
在本文中，我们提出了一种用于渐进压缩三维（3D）模型传输的丢包弹性系统。它基于一种联合源和信道编码方法，该方法以几何精度为代价，提高了错误弹性，从而优化了客户端的解码模型质量。我们为整个系统推导了一个理论框架，通过该框架，信道丢包行为和信道带宽可以直接与接收端的解码模型质量相关。首先，3D模型被逐步压缩成一个基本网格和一些细化层。然后，我们根据这些层对解码模型质量的重要性分配最佳前向纠错码率来保护这些层。实验结果表明，与无错误保护或等错误保护方法相比，采用非等错误保护方法的解码模型质量随着丢包率的增加而更加优雅地退化。
In this paper, we present a packet-loss resilient system for the transmission of progressively compressed three-dimensional (3D) models. It is based on a joint source and channel coding approach that trades off geometry precision for increased error resiliency to optimize the decoded model quality on the client side. We derive a theoretical framework for the overall system by which the channel packet loss behavior and the channel bandwidth can be directly related to the decoded model quality at the receiver. First, the 3D model is progressively compressed into a base mesh and a number of refinement layers. Then, we assign optimal forward error correction code rates to protect these layers according to their importance to the decoded model quality. Experimental results show that with the proposed unequal error protection approach, the decoded model quality degrades more gracefully (compared to either no error protection or equal error protection methods) as the packet-loss rate increases.