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对于系统芯片设计,IP的质量是至关重要的。要对口进行质量评估,首先要有一套相应的评测标准、评估方法学和评测流程。因此提出了一种基于第三方评测机构的IP核评测流程.从口核工业界标准,口核静态性能方面研究了口性能测试技术、相关算法和工具。 相似文献
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在SoC设计中,IP的使用可以缩短设计周期、降低设计风险,已经成为SoC设计不可缺少的部分.IP共性技术,包括IP保护、IP评测是IP核使用中面临的重要问题.针对以上两个问题提出了综合的解决方案,提出了在IP打包过程中对IP进行评测的方法,搭建了兼容主流EDA工具的IP打包评测平台,并在此平台上完成了一款8051核的打包评测. 相似文献
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《信息技术与标准化》2007,(6)
6信息技术与标准化2007年第6期(2007年4月19日)序号项目名称主要研究内容制定或修订主要起草单位完成年限技术归口领域:集成电路IP核本标准主要规定了软IP核、硬1IP文档结构指南IP核和模拟IP核从功能规范、设集成电路IP核信息产业部电子工业计、验证、测试、转让到集成等制定标准工作组2007年标准化研究所环节的文档编写结构指南。本标准主要规定了用于对软IP2IP核质量评测核和硬IP核进行自评和第3方质制定集成电路IP核2007年信息产业部电子工业量评测的内容和准则。标准工作组标准化研究所本标准描述了在产品测试时对嵌入在SoC内… 相似文献
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本文结合当前三网融合的形势和新的市场需求,分析了视频IP传输监测与测试的意义,并简要介绍了IP传输监测与测试的工作原理和IP传输质量测试标准,最后以NGB系统为例进行对监测功能与测试进行了详细的阐述。 相似文献
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集成电路IP技术标准 总被引:5,自引:0,他引:5
IP复用是SOCC设计的关键技术。为解决IP在SOC上的易集成性等问题,需要建立统一的标准和规范,因此,IP复用的基础是IP的标准化设计。文章介绍了国际上IP联盟/组织及IP标准的制定情况,研究了VSIA发布的IP标准和规范;从IP的可复用接口设计、IP可交付使用文档、IP保护三个方面集中介绍了VSIA制定的标准和规范。 相似文献
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Image quality assessment (IQA) is a fundamental problem in image processing. While in practice almost all images are represented in the color format, most of the current IQA metrics are designed in gray-scale domain. Color influences the perception of image quality, especially in the case where images are subject to color distortions. With this consideration, this paper presents a novel color image quality index based on Sparse Representation and Reconstruction Residual (SRRR). An overcomplete color dictionary is first trained using natural color images. Then both reference and distorted images are represented using the color dictionary, based on which two feature maps are constructed to measure structure and color distortions in a holistic manner. With the consideration that the feature maps are insensitive to image contrast change, the reconstruction residuals are computed and used as a complementary feature. Additionally, luminance similarity is also incorporated to produce the overall quality score for color images. Experiments on public databases demonstrate that the proposed method achieves promising performance in evaluating traditional distortions, and it outperforms the existing metrics when used for quality evaluation of color-distorted images. 相似文献
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针对片上网络性能评估的通用性问题,提出将OCP协议运用到片上网络性能评估平台中,设计与实现了一个具有OCP接口的片上网络资源节点,该资源节点通过OCP协议与片上网络路由节点进行通信。以资源节点为主要构成单元,构建了片上网络性能评估平台。该评估平台采用集成化的设计方式,将流量产生机制、接收机制和性能分析逻辑单元集成在资源节点内部,使得平台易于灵活配置。本文结合具体的片上网络实例验证了该平台的正确性。 相似文献
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在对标准Intel8086微处理器进行分析的基础上,本文介绍了一种与其指令集兼容、性能大幅提高的可重用16位微处理器IP软核的设计。从处理器体系结构的划分,到指令集的设计以及处理器内部各单元的设计,进行了比较详尽的阐述,并对该设计进行了软件仿真和硬件验证。该处理器采用缩短指令执行时钟周期、增加指令预取队列、改进总线接口时序和减少有效地址计算时间等系统架构的优化,使性能得到大幅度的提高;通过扩展指令集实现与标准8086、8088、80186和80188系列微处理器完全软件兼容。 相似文献
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目前,投影补偿算法已经取得了良好的研究成果,但大部分的投影图像色彩补偿研究,忽略了色彩传递函数建模过程中的光学部分,导致对色彩传递函数的建模精确度不高。同时,针对投影图像色彩补偿过程中,出现的加深网络导致提取特征信息丢失的现象,大多数的深度学习网络优化设计较少。基于以上问题,本文提出了一种基于注意力特征增强的投影图像光度补偿方法。该方法通过增加网络深度来提取带有彩色纹理投影表面的特征信息,同时采用深度学习来拟合复杂的复合辐射传递函数,以解决传统光度补偿方法存在的问题,提高了投影图像的质量和色彩,进一步消除了对高质量投影幕的依赖。本文所提方法的投影图像光度补偿结果,在峰值信噪比(PSNR)、均方根误差(RMSE)和结构相似性(SSIM)三项评价指标上,均好于其他对比算法,与CompenNet系列方法相比,本文所提方法在PSNR评价指标上最高提升5717、在RMSE评价指标上最高减少14968,在SSIM评价指标上最高提升2893。 相似文献
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Andreas Festag Holger Karl Adam Wolisz 《Wireless Communications and Mobile Computing》2007,7(3):319-339
To solve the IP mobility problem, the use of multicast has been proposed in a number of different approaches, applying multicast in different characteristic ways. We provide a systematic discussion of fundamental options for multicast‐based mobility support and the definition and experimental performance evaluation of selected schemes. The discussion is based on an analysis of the architectural, performance‐related, and functional requirements. By using these requirements and selecting options regarding network architecture and multicast protocols, we identify promising combinations and derive four case studies for multicast‐based mobility in IP‐based cellular networks. These case studies include both the standard any‐source IP multicast model as well as non‐standard multicast models, which optimally utilize the underlying multicast. We describe network architecture and protocols as well as a flexible software environment that allows to easily implement these and other classes of mobility‐supporting multicast protocols. Multicast schemes enable a high degree of flexibility for mobility mechanisms in order to meet the service quality required by the applications with minimal protocol overhead. We evaluate this overhead using our software environment by implementing prototypes and quantifying handoff‐specific metrics, namely, handoff and paging latency, packet loss and duplication rates, as well as TCP goodput. The measurement results show that these multicast‐based schemes improve handoff performance for high mobility in comparison to the reference cases: basic and hierarchical Mobile IP. Comparing the multicast‐schemes among each other the performance for the evaluated metrics is very similar. As a result of the conceptual framework classification and our performance evaluations, we justify specific protocol mechanisms that utilize specific features of the multicast. Based on this justification, we advocate the usage of a source‐specific multicast service model for multicast‐based mobility support that adverts the weaknesses of the classical Internet any‐source multicast service model. Copyright © 2006 John Wiley & Sons, Ltd. 相似文献
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In reliability engineering, there always exist uncertainties caused by the scarcity of data and information. Various metrics are developed to measure reliability under uncertainty, including evidence-theory-based reliability, interval-analysis-based reliability, fuzzy-interval-analysis-based reliability, posbist reliability and belief reliability. As these five metrics are difficult to be fully understood, it is hard to select the most appropriate one for a specific condition. This paper will propose an uncertain evaluating model to conduct an objective evaluation on these uncertainty metrics. An evaluating index system is established from the aspects of capabilities and adaptabilities. Uncertainty theory is adopted to deal with subjective uncertainties in the quantification process of the index system. Then an evaluating method based on uncertain data envelopment analysis is proposed to provide decision-makers with a succinct result for a given operational context. Finally, the evaluating method is illustrated with a numerical example, which shows that final metric choices vary with different requirements. 相似文献
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IP网络性能特征模型分析 总被引:3,自引:0,他引:3
以Internet为代表的IP网络正日益成为一种重要的通信基础设施,但在当前的Internet上支持实时媒体应用仍然是一个难点。为了能够在尽力而为的IP网络上支持多媒体的应用,需要深入地理解网络性能特征。网络性能特征的研究包括对网络进行测量、建模和分析,定量或定性地得出网络的性能指标,从而有效地对网络进行预测、控制和使用。本文对已有的网络性能方面的研究成果进行归纳、总结和验证,得出了IP网络通信平台的基本性能特征模型。 相似文献