In our paper , we firstly summarize the development of low rate video communication , before we implement h . 263 encoder to the adi ( analog devices incorporated ) evaluation board - - - - - adsp - bf535 ez - kit lite ; we make in - depth research about h . 263 本文首先概述了低码率视频通信的发展,然后对低比特率的视频编码标准h . 263进行了深入的研究;并在adi ( analogdevicesincorporated )公司的adsp - bf535ez - kitlite评估板上的实现了h . 263视频编解码器。
At last , a experiment about compensate the frequency response of speaker was completed . the main equipments of the experiment are tas3001evm evaluate broad and the msp430 mcu developed by flash emulator tool . the results of the experiment are matching the simulation , and the sound quality is improved greatly 最后是使用tas3001evm评估板和msp430单片机flash系列的fet开发工具制作出来的实验装置对扬声器进行频率响应补偿实验，实验结果显示与仿真结果相符，扬声器的音质得到在很大的改善。
Then describe three aspects of the key techniques of using linux as the development tools of embedded system including the real - time variant of linux ? ? rt linux and it ' s principle , implementation and the programming ; the network coding in linux kernel and the analysis of linux network device drivers and the online debug environment of linux kernel and rtlinux kernel . i have also involved the implementation of embed linux / rtlinux in a floppy to simulate the embedded environment . in the last part of this thesis , i give the suggestions and prospect of the development of a mature embedded system which have the most competition ability in china market base on the current work 紧接着，分两个方面论述使用linux进行嵌入式系统开发的便利，包括linux的实时变种? ? rtlinux的原理、实现方案和编程方法，并且编程实现了一个计算实时任务调度时间的软件； linux网络设备驱动程序的分析和利用到嵌入式系统中的方案；然后，以作者在黑龙江傲立信息有限公司课外实习期间的实际工作经历，介绍了基于lineo公司的ucsimm开发评估板进行嵌入式设备开发的一般过程。
Considering the developmental trend of the video compress and the demands of the people , this paper makes researches on the visual section of the mpeg - 4 standard , present an amendment to the ds search algorithm , and does some optimization to the module of compress which is utilized frequently by the encoder so that the encoder can accomplish real - time compression on adsp - blackfin535 evm board to the cif picture , the size of which is 352 by 288 因此,研究mpeg - 4视频编码标准并实现实时编解码具有重要意义,特别是在图像质量和实时性方面要求都很高的场合,例如电视会议、视频电话和iptv等。本文结合这种需求和趋势,研究了mpeg - 4sp编码原理,改进了ds算法。通过内存优化、结构优化和汇编级优化,最终实现了编码器在adsp - blackfin535评估板上的实时编码。
The device is so powerful that it can perform primary control in double - start positioning system . then we analyze the key technologies both hardware driver divice and software development in the embedded system design . the most important program run on the cpu is real time operation system ( rtos ) 实时操作系统( rtos )是嵌入式软件的核心部分，对于该系统我们选择了lynuxworks公司的bluecatlinux ，完成在评估板的ep7312微处理器上进行系统的安装、实现文件系统、外设的驱动、图形用户接口( gui )及其他应用程序软件的设计。
We realized the h . 264 coder on evm based on dsp tms320dm642 made by ti recently . firstly in the paper , we detail h . 264 standard after getting the knowledge about video compression . my classmate joined in the design and improvement of coder flow chart based on software jm73 , migrated and optimized the jm73 software to the tms320dm642 evm 本文在ti公司推出的600mhztms320dm642评估板( evm )上实现了符合h . 264标准的编码器,在视频压缩理论的基础上,对h . 264标准进行了比较详细的分析,而我的同学则对已有软件jm73基础上进行编码器软件流程的设计和改进,并将此软件向tms320dm642evm硬件平台上进行了移植和优化。
Second , porting ecos system is the cornerstone of ecos system , the job is according to target board programme that bottom hal ( hardware abstraction layer ) porting code and certain driver codes supportting devices of target board , then configures , complices , links and borns an ecos library file 本人还参与完成的一个基于ecos的voip终端的设计和实现。该终端是基于飞思卡尔公司的mcf5235evb评估板和本文成功移植的ecos嵌入式操作系统,并在其上移植sip等相关的应用协议栈。
The software design , which includes wavelet transform and cl1anged zero tree method , is accomplisi1ed with tc . then , debug of " i ' i company ' s ccs software is used to change tc progran1 to hardware program . wt620l board , wllose center ci1ip is tl ' s digital signal processor ( dsp ) tms320c620l , is used to run tl1e program 本方法从水声信道实际需要出发对零树法加以改变，并在tc环境下完成小波变换及改变的零树法的软件设计，在ti公司的ccs软件提供的debug环境下、闻亭公司以ti公司数字信号处理芯片( dsp ) tms320c6201为核心芯片的wt6201评估板上完成硬件程序运行。
In this paper , it was studied that how to use the universal serial bus ( usb ) evaluation card and some other hardware , combining the software , such as labview , vc + + 6 . 0 program language and others to make a usb data acquisition card . then , we made a single photon counter cell function analyzer using this card . it actualized automatic detection 本文主要研究通过usb ( universalserialbus ，通用串行总线)评估板等硬件、 labview 、 vc + + 6 . 0语言等软件平台开发研制了usb数据采集卡；并在此基础上设计、研制了超微弱发光单光子计数细胞功能分析仪，实现了相关检测的全程自动化测量。
