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Fault tolerance design in JPEG 2000 image compression system

机译:JPEG 2000图像压缩系统中的容错设计

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The JPEG 2000 image compression standard is designed for a broad range of data compression applications. The new standard is based on wavelet technology and layered coding in order to provide a rich feature compressed image stream. The implementations of the JPEG 2000 codec are susceptible to computer-induced soft errors. One situation requiring fault tolerance is remote-sensing satellites, where high energy particles and radiation produce single event upsets corrupting the highly susceptible data compression operations. This paper develops fault tolerance error-detecting capabilities for the major subsystems that constitute a JPEG 2000 standard. The nature of the subsystem dictates the realistic fault model where some parts have numerical error impacts whereas others are properly modeled using bit-level variables. The critical operations of subunits such as discrete wavelet transform (DWT) and quantization are protected against numerical errors. Concurrent error detection techniques are applied to accommodate the data type and numerical operations in each processing unit. On the other hand, the embedded block coding with optimal truncation (EBCOT) system and the bitstream formation unit are protected against soft-error effects using binary decision variables and cyclic redundancy check (CRC) parity values, respectively. The techniques achieve excellent error-detecting capability at only a slight increase in complexity. The design strategies have been tested using Matlab programs and simulation results are presented.
机译:JPEG 2000图像压缩标准旨在用于各种数据压缩应用程序。新标准基于小波技术和分层编码,以提供功能丰富的压缩图像流。 JPEG 2000编解码器的实现容易受到计算机引起的软错误的影响。要求容错的一种情况是遥感卫星,其中高能粒子和辐射会产生单个事件扰动,从而破坏高度敏感的数据压缩操作。本文为构成JPEG 2000标准的主要子系统开发了容错错误检测功能。子系统的性质决定了实际的故障模型,其中某些零件会产生数值误差影响,而其他零件则使用位级变量进行适当建模。诸如离散小波变换(DWT)和量化之类的子单元的关键操作受到保护,以防止数值误差。应用并发错误检测技术以适应每个处理单元中的数据类型和数值运算。另一方面,分别使用二进制判决变量和循环冗余校验(CRC)奇偶校验值保护具有最优截断的嵌入式块编码(EBCOT)系统和位流形成单元免受软错误影响。该技术仅在稍微增加复杂度的情况下即可实现出色的错误检测能力。使用Matlab程序对设计策略进行了测试,并给出了仿真结果。

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