基于Hi3516A的H265码流实时传输系统设计

介绍了在海思Hi3616A开发平台下实现的一种H265码流实时传输系统。利用海思提供的媒体处理平台(MPP)采集高清摄像头感应到的视频图像并进行H265压缩编码,然后对LIVE555开源代码进行二次开发,实现播放H265实时码流的功能,将压缩编码后的数据发送出去。设计结果表明,系统传输高清视频图像延迟短,播放流畅,满足智能监控领域应用的要求。     

H.265——视频监控的下一个圣杯？

目前,大约有80％以上的视频芯片支持H.264编解码标准,作为继承技术,在一年半以前获得核准的H．265（又称高效率视频编码,HEVC）一直被视为是H．264理所当然的接班者,许多业内人士预测,H．265应该很快就能凭借着减少一半带宽需求,在对视频传输需求几乎呈指数级增长的广大消费市场和需要更高效图像质量的高清视频监控领域中崛起。     

H.265：引爆网络视频的高清时代

说起H．265可能很多人并不太了解其究竟为何物？但对于高清视频的全面普及所有人都趋之若鹜。在这个电视拼4K极清,网络视频拼超清,视频监控拼高清的“视频血拼”年代,人们都希望在不用大费周章增加带宽的前提下获得更高清更唯美的视频画质体验。对于这样的期待,未来H．265很可能帮大家实现。     

基于H.265标准的机载HDMI视频处理系统设计

基于H.265标准的机载HDMI视频信号处理系统具备多种视频预处理功能,有利于提高视频质量。与采用H.264标准的视频处理系统相比,该系统的频压缩效率显著提高,降低了机载HDMI视频对存储空间和传输带宽的要求,便于机载视频的存储和无线传输。     

基于WinCE平台的高清视频监控系统的实现

通过对高清视频监控的分析,在基于嵌入式的平台上,对前端高清网络摄像机的视频信息通过网络传输在终端的嵌入式服务器上通过IDE接口进行硬盘存储,并通过H.264的解码技术对视频流进行解码以实现视频信息在监控终端屏幕上的显示。     

视频编码新标杆——DivX 10试用与综评

软件一直以来,高画质、小体积、串流化是人们对理想高清视频的要求。然而,高画质与小体积却是一对与生俱来的矛盾。如何在高画质与小体积的博弈中寻求突破始终是高清视频编码的努力方向。日前,Rovi推出了新一代高清视频编码标准DivX10。新标准有何亮点？会带来什么新气象？让我们一探究竟。高质量编/解码作为前个免费创建和播放高效视频编码（HEVC/H.265）标准的视频软件,DivX 10推出的新HEVC编码方案的压缩率接近原H.264的两倍。这意味着由H.265编码的视频在同等清晰度下的体积可以减少到原H.264     

一种基于图像分割的视频传输方案

随着国家平安城市等大型项目的推进,以安防为目的的视频监控行业得到了快速发展,视频监控系统呈现出了高清化和网络化的发展趋势.在整个视频监控系统中,高清监控视频在网络中的传输成为了限制发展的瓶颈问题.本系统设计了一套用于高清监控视频在网络中传输的自适应系统,采用图像分割后区别压缩的机制进行视频传输.同时加强系统对于网络环境的适应能力,在系统中实时地估计网络状态,动态调整发送速率,充分利用了网络带宽,又避免使网络陷入拥塞,很好地解决了高清监控视频传输对网络带宽的需求和网络带宽不足之间矛盾,到达了高清监控的目的.     

如何播放H.265视频

正现在最流行的视频是H.265格式,与H.264相比,在同等画面品质下,码率仅为原来的一半,文件体积可缩小39%—44%,为网络传输4K高清节目带来了福音。但解码运算量比以前提高了一倍,所以需要更强劲的CPU。使用DirectShow技术播放视频时,首先下载解码器,这里使用视骏公司的免费产品。安装注册后,可在MONOGRAM GraphStudio的Filters管理中发现Lentoid HEVC Decoder,Lentoid HEVC Source这两个滤镜。开始编码前,在stdafx.h中     

Hi3507与流媒体服务器的视频监控系统设计

网络视频监控系统不仅要求采集的图像清晰度要高,而且对视频图像的压缩和传输都有很高的要求。本设计选取海思SoC Hi3507为主芯片,结合CMOS高清图像传感器OV2643、H.264编码技术和基于live555的流媒体服务器搭建了一个高清网络视频监控系统。实践表明,该系统不仅采集到的图像清晰流畅、实时性好,而且具有较高的性价比。     

富瀚微发布H-264高清网络摄像机和视频服务器解决方案

近日,上海富瀚微电子正式发布H．264高清网络摄像机和视频服务器解决方案．推出3款参考设计：高清枪式网络摄像机、高清视频会议摄像机和多通道网络视频服务器。其中．高清枪式网络摄像机采用高性能H．264视频编码ASIC芯片,视频压缩算法优越．压缩比高、处理灵活：功能齐全。     

Only connect: teaching, technology and telesis

Abstract This paper describes an approach to the design of interactive multimedia materials being developed in a European Community project. The developmental process is seen as a dialogue between technologists and teachers. This dialogue is often problematic because of the differences in training, experience and culture between them. Conditions needed for fruitful dialogue are described and the generic model for learning design used in the project is explained.     

European Community policy and the market

Abstract This paper starts with some reflections on the policy considerations and priorities which are shaping European Commission (EC) research programmes. Then it attempts to position the current projects which seek to capitalise on information and communications technologies for learning in relation to these priorities and the apparent realities of the marketplace. It concludes that while there are grounds to be optimistic about the contribution EC programmes can make to the efficiency and standard of education and training, they are still too technology driven.     

一种自适应子融合集成多分类器方法

融合集成方法已经广泛应用在模式识别领域,然而一些基分类器实时性能稳定性较差,导致多分类器融合性能差,针对上述问题本文提出了一种新的基于多分类器的子融合集成分类器系统。该方法考虑在度量层融合层次之上通过对各类基多分类器进行动态选择,票数最多的类别作为融合系统中对特征向量识别的类别,构成一种新的自适应子融合集成分类器方法。实验表明,该方法比传统的分类器以及分类融合方法识别准确率明显更高,具有更好的鲁棒性。     

Avoiding semantic and temporal gaps in developing software intensive systems

Development of software intensive systems (systems) in practice involves a series of self-contained phases for the lifecycle of a system. Semantic and temporal gaps, which occur among phases and among developer disciplines within and across phases, hinder the ongoing development of a system because of the interdependencies among phases and among disciplines. Such gaps are magnified among systems that are developed at different times by different development teams, which may limit reuse of artifacts of systems development and interoperability among the systems. This article discusses such gaps and a systems development process for avoiding them.     

基于QTE的蒙古文显示机制研究与实现

蒙古语言是中国蒙古族使用的通用语言,由于蒙古文区别于其他文字的书写方式和其自身变形机制等特点,在很多通用的文字处理引擎中都不被支持。在嵌入式产品开发与应用领域中Linux加QTE已经成为流行方式。该文给出了一种在QTE环境上实现基于标准Unicode的蒙古文点阵显示和变形算法, 并自定义了支持蒙古文的QTE组件,扩展了QTE功能,为在Linux加QTE方式的嵌入式体系结构中处理蒙古文提供了一种解决方法。     

Designing economic np control charts: A programmed simulation approach

This paper presents control charts models and the necessary simulation software for the location of economic values of the control parameters. The simulation program is written in FORTRAN, requires only 10K of main storage, and can run on most mini and micro computers. Two models are presented - one describes the process when it is operating at full capacity and the other when the process is operating under capacity. The models allow the product quality to deteriorate to a further level before an existing out-of-control state is detected, and they can also be used in situations where no prior knowledge exists of the out-of-control causes and the resulting proportion defectives.     

基于AD9626的模拟信号采集存储卡设计

自然界的绝大部分信号都是以模拟的形式存在,因此模拟信号的采集转换存储在数字时代十分关键。文章讨论了在雷达信号处理领域基于AD9626的AD采集存储卡的设计原理、硬件结构和程序设计与芯片配置等问题,为今后相关领域的研究提供了可参考的方案。     

The development of robot art

Going through a few examples of robot artists who are recognized worldwide, we try to analyze the deepest meaning of what is called “robot art” and the related art field definition. We also try to highlight its well-marked borders, such as kinetic sculptures, kinetic art, cyber art, and cyberpunk. A brief excursion into the importance of the context, the message, and its semiotics is also provided, case by case, together with a few hints on the history of this discipline in the light of an artistic perspective. Therefore, the aim of this article is to try to summarize the main characteristics that might classify robot art as a unique and innovative discipline, and to track down some of the principles by which a robotic artifact can or cannot be considered an art piece in terms of social, cultural, and strictly artistic interest. This work was presented in part at the 13th International Symposium on Artificial Life and Robotics, Oita, Japan, January 31–February 2, 2008     

煤矿井下安全监控分站的设计及其仿真实现

为了设计一种具有低成本、低功耗、易操作、功能强且可靠性高的煤矿井下安全分站,针对煤矿安全生产实际,文章提出了采用MCS-51系列单片机为核心、具有CAN总线通信接口的煤矿井下安全监控分站的设计方案;首先给出煤矿井下安全监控分站的整体构架设计,然后着重阐述模拟量输入信号处理系统的设计过程,最后说明单片机最小系统及其键盘、显示、报警、通信等各个组成部分的设计;为验证设计方案的可行性与有效性,使用Proteus软件对设计内容进行仿真验证,设计的煤矿井下安全监控分站具有瓦斯、温度等模拟量参数超标报警功能和电机开停、风门开闭等开关量指示功能;仿真结果表明:设计的煤矿井下安全监控分站具有一定的实际应用价值.     

A human-computer interface for non-computer specialists

The COM teleconferencing system was designed to be easy to use for both beginners and people with much computer experience. A number of design choices in organizing the human-computer interface were considered very carefully. These design problems are not unique for teleconferencing applications, but will appear in many other developments of human-computer interfaces for non-computer specialists. This report discusses naming conventions, menu format, user commands, help facility and the treatment of ‘type ahead’ from the users.