基于VLSI视频编码中的可靠性设计-通信与信息系统专业论文.docxVIP

摘要 随着空间技术的不断发展，人们对太空的探索不断迈向更高的高度。同时， 空间中对于视频这种最直观的观测方式的需求也越来越大。但由于视频压缩输入 的数据量大，运算复杂，没有专用的宇航芯片为空间探测提供支持，这些一直制 约着视频压缩在空间领域的应用。FPGA 作为可重复编程、安全性强、适用性强的 器件已经广泛应用于军事、交通、航空等领域。采用 FPGA 作为视频编码运算芯片 的已经是很普遍的现象。但即使是 FPGA 也存在空间可靠性的问题。而想要在空间 中用 FPGA 实现视频编码就必须考虑针对其靠性的问题。 本文提出了一整套针对采用 FPGA 实现视频编码提高其可靠性的计方法。通过 对输入信号的正确采样、容错处理、规范跨时钟域的信号处理、安全状态机的编 码方式、基于内部工作状态检测的软复位计数器实现视频编码系统在软件上的可 靠性。再通过关键结构三模冗余、看门狗复位、系统重配置以及刷新等方法实现 视频编码系统在硬件上的可靠性。在实现相应的设计后，对本文的可靠性设计进 行相关的测试，并对工程进行综合和性能分析。结果表明，在逻辑资源增加不大 的情况下，本文的设计能够在 XC2V3000 上实现 MEPG-4 视频编码的可靠性设计并 且运行时钟频率达到 60Mhz。 关键字： MEPG-4 视频编码 VLSI 可靠性 Abstract With the continuous development of space technology, space exploration move towards a higher height. At the same time, the demand for the visual this most intuitive observation is also growing. But the large amount of data input, computational complexity, there is no dedicated aerospace chip support for space exploration, which has restricted the video compression in the field of space applications due to video compression. FPGA reprogrammable, safety, and applicability of the device have been widely used in military, transportation, aviation and other fields. FPGA chip as video encoding operation is already very common. But even FPGA also exist the problem of reliability of the space. Want video encoder FPGA implementation using space must be considered for its reliability. In this paper, a set of encoding video for FPGA implementation to improve its reliability count. By the correct sampling of the input signal, the fault-tolerant processing, standardized across clock domain signal processing, the coding mode of the security state machine, the soft reset counter is detected based on the internal work state to achieve the reliability of the video coding system in the software. By Triple Modular Redundancy of critical structures, watchdog reset, system reconfiguration, and scrub methods to improve the reliability of the video encoding system. After implementing the design, it tests the reliability of de