osi layers approach study
上传时间： 2017-06-14
上传用户：qw12
摘要 本研究计划之目的，在整合应用以ARM为基础的嵌入式多媒体实时操作系统于H.264/MPEG-4多媒体上。由于H.264是一种因应实时系统(RTOS)所设计的可扩展性串流传输(scalability stream media communication)的编码技术。H.264主要架构于细细粒可扩展(Fine Granula Scalability,FGS)的压缩编码机制。细粒度可扩展压缩编码技术是最新MPEG-4串流式传输标准，能依频寛的差异来调整传输的方式。细粒度扩展缩编码技术以编入可选择性的增强层(enhanced layers)于码中，来提高影像传输的质量。本计划主要在于设计一种简单有效的实时阶层可扩展的影像传输系统。在增强层编码及H.264的基本层(base layer)编码上使用渐进的细粒度可扩展编码(Progressive Fine Granularity Scalable,PFGS)能直接使用H.264的格式特色来实现FGS。同时加入了LB-LLF(Layer-Based Least-Laxity-Fir stscheduling algorithm)的排程算法，来增 进网路传输影像的质量。由实验结果显示本系统在串流影像质量PSNR值上确有较佳的效能。
上传时间： 2014-12-26
上传用户：mpquest
介绍一种基于CAN总线的牵引变电站自动化系统通讯规约的设计，CAN通讯规约采用标准帧，报文采用主动发送和发送查询两种处理形式。该设计在城市轻轨与地铁牵引变电站中的应用表明：可实现间隔层和通讯处理层的数据快速、可靠的交换，提高牵引变电站的安全性和稳定性 。 Abstract: This paper firstly presents a kind of design dealing with communicational protocol to the traction substation automation system based on CAN bus,and then comes up with the ideas that all frames of CAN communicational protocol should adopt the standard frame,and that messages be processed by two ways:sending initiatively and sending quiries.Subway and light rail application shows that the use of the CAN bus is possible to exchange data quickly and reliably between the layers of the middle and the communicational processing,hence to improve the safety and stability of traction substations.
上传时间： 2013-11-07
上传用户：bs2005
The super-junction structure, which has P-type pillar layers as shown left, realizes high withstand voltage and ON-resistance lower than the conventional theoretical limit of silicon.
上传时间： 2014-12-31
上传用户：qwer0574
This Delphi 4.0 example uses the MapX Ver 4.0 OCX Control. The main goal of this example is to show the use of the new object editing capabilities in MapX Ver 3.51. The program show how to perform functions such as adding a new layer adding lines and points, and editing a layers data.
标签： example 4.0 Control Delphi
上传时间： 2015-04-10
上传用户：lhc9102
Using a holistic approach to teaching developers the ins-and-outs of GNU/Linux programming using APIs, tools, communication, and scripting, this book introduces programmers to the environment from the lowest layers to the user layers.
标签： ins-and-outs programming developers holistic
上传时间： 2013-12-23
上传用户：kristycreasy
The Unisoft software module GERBER CONNECTION (CNC-BRIDGE). GERBER CONNECTION has all the features of VIEW-MARKUP and adds the ability to open multiple gerber file layers and add information to components. It is always the preference to use the CAD data vs. gerber data. If you do not have the CAD data then GERBER CONNECTION can help.
标签： CONNECTION GERBER CNC-BRIDGE software
上传时间： 2014-01-21
上传用户：13681659100
DirectFB is a thin library that provides hardware graphics acceleration, input device handling and abstraction, integrated windowing system with support for translucent windows and multiple display layers on top of the Linux Framebuffer Device.
标签： acceleration DirectFB hardware graphics
上传时间： 2014-06-30
上传用户：wangchong
A Cross-browser JavaScript DHTML Library which adds Drag Drop functionality and extended DHTML capabilities to layers and to any desired image, even those integrated into the text flow.
标签： DHTML Cross-browser functionality JavaScript
上传时间： 2014-01-07
上传用户：xmsmh
IEEE 802.16e-2005 IEEE Standard for Local and metropolitan area networks Part 16: Air Interface for Fixed and Mobile Broadband Wireless Access Systems Amendment for Physical and Medium Access Control layers for Combined Fixed and Mobile Operation in Licensed Bands.
标签： IEEE metropolitan Interface for
上传时间： 2016-10-02
上传用户：litianchu
