Foreground moving object detection is an important process in various computer vision applications such as intelligent visual surveillance, HCI, object-based video compression, etc. One of the most successful moving o...Foreground moving object detection is an important process in various computer vision applications such as intelligent visual surveillance, HCI, object-based video compression, etc. One of the most successful moving object detection algorithms is based on Adaptive Gaussian Mixture Model （AGMM）. Although ACMM-hased object detection shows very good performance with respect to object detection accuracy, AGMM is very complex model requiring lots of floatingpoint arithmetic so that it should pay for expensive computational cost. Thus, direct implementation of the AGMM-based object detection for embedded DSPs without floating-point arithmetic HW support cannot satisfy the real-time processing requirement. This paper presents a novel rcal-time implementation of adaptive Gaussian mixture model-based moving object detection algorithm for fixed-point DSPs. In the proposed implementation, in addition to changes of data types into fixed-point ones, magnification of the Gaussian distribution technique is introduced so that the integer and fixed-point arithmetic can be easily and consistently utilized instead of real nmnher and floatingpoint arithmetic in processing of AGMM algorithm. Experimental results shows that the proposed implementation have a high potential in real-time applications.展开更多
Si P微系统是一种高度集成化的系统,其内部可能集成1个或多个DSP、NOR Flash和DDR存储器、AI加速芯片等,有些复杂的微系统还集成了FPGA芯片。由于内部集成了多个微组件,芯片之间相互连接,传统的测试单一微组件的方法并不适用于微系统的...Si P微系统是一种高度集成化的系统,其内部可能集成1个或多个DSP、NOR Flash和DDR存储器、AI加速芯片等,有些复杂的微系统还集成了FPGA芯片。由于内部集成了多个微组件,芯片之间相互连接,传统的测试单一微组件的方法并不适用于微系统的测试。提出了一套DSP微组件测试方法,该系统包括1块专门的测试板、可调试的电脑测试环境和JTAG通信。与单一的DSP裸芯测试相比,它可以快速稳定地实现DSP微组件的性能测试,满足大批量生产测试的需求。展开更多
就电动机变频调速自动控制系统的设计与实现展开研究。首先,给出了电动机变频调速自动控制系统整体框架,并详细阐述了数字信号处理器(Digital Signal Processor,DSP)技术。在软件设计部分,针对DSP技术存在控制复杂度高的问题,引入比例-...就电动机变频调速自动控制系统的设计与实现展开研究。首先,给出了电动机变频调速自动控制系统整体框架,并详细阐述了数字信号处理器(Digital Signal Processor,DSP)技术。在软件设计部分,针对DSP技术存在控制复杂度高的问题,引入比例-积分-微分(Proportional-Integral-Derivative,PID)控制策略简化控制流程,并提出了基于模糊控制的电动机变频调速自动控制方法,以实现更精确的变频调速控制。系统应用测试结果表明,新系统控制误差低至1.2%,波动范围小且故障率低至0.01次/h,使得系统稳定性指数(System Stability Index,SSI)仅为0.95,说明本研究为电动机变频调速领域的自动化和智能化提供了有价值的参考。展开更多
针对视频信号处理需求,设计一种基于数字信号处理器(Digital Signal Processor,DSP)的高清远程视频通信监控系统。首先从系统架构、DSP选择与配置、视频信号采集与预处理等方面进行详细设计,其次介绍DSP的编程与实现及系统集成与调试过...针对视频信号处理需求,设计一种基于数字信号处理器(Digital Signal Processor,DSP)的高清远程视频通信监控系统。首先从系统架构、DSP选择与配置、视频信号采集与预处理等方面进行详细设计,其次介绍DSP的编程与实现及系统集成与调试过程,最后结合仿真与性能分析,验证了系统在实际应用中的可行性与优越性。展开更多
随着广播电视行业的快速发展,音频信号的质量成为提升视听体验的关键因素。传统音频处理方法已无法满足现代广播电视系统对音频清晰度、动态范围及噪声控制的高要求,数字信号处理(Digital Signal Processing,DSP)技术以其强大的计算能...随着广播电视行业的快速发展,音频信号的质量成为提升视听体验的关键因素。传统音频处理方法已无法满足现代广播电视系统对音频清晰度、动态范围及噪声控制的高要求,数字信号处理(Digital Signal Processing,DSP)技术以其强大的计算能力和灵活的处理方式成为解决此问题的有效手段。重点研究DSP技术在广播电视音频信号处理中的优化措施,探讨优化噪声抑制算法、动态范围压缩、增强音频均衡处理以及集成回声消除算法等技术的融合应用。这些技术的有效结合能够显著减少噪声对音频质量的干扰,精确检测音频信号的动态变化,确保音频信号的均衡,并有效消除音频信号中的回声。展开更多
基金supported by Soongsil University Research Fund and BK 21 of Korea
文摘Foreground moving object detection is an important process in various computer vision applications such as intelligent visual surveillance, HCI, object-based video compression, etc. One of the most successful moving object detection algorithms is based on Adaptive Gaussian Mixture Model （AGMM）. Although ACMM-hased object detection shows very good performance with respect to object detection accuracy, AGMM is very complex model requiring lots of floatingpoint arithmetic so that it should pay for expensive computational cost. Thus, direct implementation of the AGMM-based object detection for embedded DSPs without floating-point arithmetic HW support cannot satisfy the real-time processing requirement. This paper presents a novel rcal-time implementation of adaptive Gaussian mixture model-based moving object detection algorithm for fixed-point DSPs. In the proposed implementation, in addition to changes of data types into fixed-point ones, magnification of the Gaussian distribution technique is introduced so that the integer and fixed-point arithmetic can be easily and consistently utilized instead of real nmnher and floatingpoint arithmetic in processing of AGMM algorithm. Experimental results shows that the proposed implementation have a high potential in real-time applications.
文摘就电动机变频调速自动控制系统的设计与实现展开研究。首先,给出了电动机变频调速自动控制系统整体框架,并详细阐述了数字信号处理器(Digital Signal Processor,DSP)技术。在软件设计部分,针对DSP技术存在控制复杂度高的问题,引入比例-积分-微分(Proportional-Integral-Derivative,PID)控制策略简化控制流程,并提出了基于模糊控制的电动机变频调速自动控制方法,以实现更精确的变频调速控制。系统应用测试结果表明,新系统控制误差低至1.2%,波动范围小且故障率低至0.01次/h,使得系统稳定性指数(System Stability Index,SSI)仅为0.95,说明本研究为电动机变频调速领域的自动化和智能化提供了有价值的参考。
文摘针对视频信号处理需求,设计一种基于数字信号处理器(Digital Signal Processor,DSP)的高清远程视频通信监控系统。首先从系统架构、DSP选择与配置、视频信号采集与预处理等方面进行详细设计,其次介绍DSP的编程与实现及系统集成与调试过程,最后结合仿真与性能分析,验证了系统在实际应用中的可行性与优越性。
文摘随着广播电视行业的快速发展,音频信号的质量成为提升视听体验的关键因素。传统音频处理方法已无法满足现代广播电视系统对音频清晰度、动态范围及噪声控制的高要求,数字信号处理(Digital Signal Processing,DSP)技术以其强大的计算能力和灵活的处理方式成为解决此问题的有效手段。重点研究DSP技术在广播电视音频信号处理中的优化措施,探讨优化噪声抑制算法、动态范围压缩、增强音频均衡处理以及集成回声消除算法等技术的融合应用。这些技术的有效结合能够显著减少噪声对音频质量的干扰,精确检测音频信号的动态变化,确保音频信号的均衡,并有效消除音频信号中的回声。
