Nowadays, from home monitoring to large airport security, a lot of digital video surveillance systems have been used. Digital surveillance system usually requires streaming video processing abilities. As an advanced v...Nowadays, from home monitoring to large airport security, a lot of digital video surveillance systems have been used. Digital surveillance system usually requires streaming video processing abilities. As an advanced video coding method, H.264 is introduced to reduce the large video data dramatically (usually by 70X or more). However, computational overhead occurs when coding and decoding H.264 video. In this paper, a System-on-a-Chip (SoC) based hardware acceleration solution for video codec is proposed, which can also be used for other software applications. The characteristics of the video codec are analyzed by using the profiling tool. The Hadamard function, which is the bottleneck of H.264, is identified not only by execution time but also another two attributes, such as cycle per loop and loop round. The Co-processor approach is applied to accelerate the Hadamard function by transforming it to hardware. Performance improvement, resource costs and energy consumption are compared and analyzed. Experimental results indicate that 76.5% energy deduction and 8.09X speedup can be reached after balancing these three key factors.展开更多
视频SoC规模的飞速增长,给FPGA验证带来了很大的挑战,大容量的外部SDRAM以及更多的外设模块的采用,不但增加了硬件的复杂度,也给相应驱动程序的调试带来了很大的难度。为了全面有效地进行FPGA验证,提出了一种在SoC验证平台中利用ADSP-BF...视频SoC规模的飞速增长,给FPGA验证带来了很大的挑战,大容量的外部SDRAM以及更多的外设模块的采用,不但增加了硬件的复杂度,也给相应驱动程序的调试带来了很大的难度。为了全面有效地进行FPGA验证,提出了一种在SoC验证平台中利用ADSP-BF 537作为处理器的验证方案,并重点介绍了ADSP外部M em ory总线和SoC系统总线(AHB)转换模块的设计。该方案已成功运用于视频SoC的验证系统中,既降低了开发成本,又提高了系统验证的效率和功能的完整性。展开更多
针对传统嵌入式系统难以处理和显示高速大数据量的红外图像的问题,介绍了基于Xilinx公司集成了双核ARM和FPGA的全可编程Zynq SOC的高速红外成像系统,其FPGA实现探测器图像采集、非均匀校正、VDMA视频流传输等功能,ARM处理器运行Linux系...针对传统嵌入式系统难以处理和显示高速大数据量的红外图像的问题,介绍了基于Xilinx公司集成了双核ARM和FPGA的全可编程Zynq SOC的高速红外成像系统,其FPGA实现探测器图像采集、非均匀校正、VDMA视频流传输等功能,ARM处理器运行Linux系统,完成通过USB Wi Fi或千兆以太网的网络视频传输。实验结果显示该系统能够实现高速率、高分辨率的红外成像,功耗低,结构简单,通用性强。展开更多
文摘Nowadays, from home monitoring to large airport security, a lot of digital video surveillance systems have been used. Digital surveillance system usually requires streaming video processing abilities. As an advanced video coding method, H.264 is introduced to reduce the large video data dramatically (usually by 70X or more). However, computational overhead occurs when coding and decoding H.264 video. In this paper, a System-on-a-Chip (SoC) based hardware acceleration solution for video codec is proposed, which can also be used for other software applications. The characteristics of the video codec are analyzed by using the profiling tool. The Hadamard function, which is the bottleneck of H.264, is identified not only by execution time but also another two attributes, such as cycle per loop and loop round. The Co-processor approach is applied to accelerate the Hadamard function by transforming it to hardware. Performance improvement, resource costs and energy consumption are compared and analyzed. Experimental results indicate that 76.5% energy deduction and 8.09X speedup can be reached after balancing these three key factors.
文摘视频SoC规模的飞速增长,给FPGA验证带来了很大的挑战,大容量的外部SDRAM以及更多的外设模块的采用,不但增加了硬件的复杂度,也给相应驱动程序的调试带来了很大的难度。为了全面有效地进行FPGA验证,提出了一种在SoC验证平台中利用ADSP-BF 537作为处理器的验证方案,并重点介绍了ADSP外部M em ory总线和SoC系统总线(AHB)转换模块的设计。该方案已成功运用于视频SoC的验证系统中,既降低了开发成本,又提高了系统验证的效率和功能的完整性。
文摘针对传统嵌入式系统难以处理和显示高速大数据量的红外图像的问题,介绍了基于Xilinx公司集成了双核ARM和FPGA的全可编程Zynq SOC的高速红外成像系统,其FPGA实现探测器图像采集、非均匀校正、VDMA视频流传输等功能,ARM处理器运行Linux系统,完成通过USB Wi Fi或千兆以太网的网络视频传输。实验结果显示该系统能够实现高速率、高分辨率的红外成像,功耗低,结构简单,通用性强。
