传输模块

• In the system , hardware : embedded micro - processor - arm9 s3c2410 , wireless communication module cc1000 , sound gathering module - microphone ( wm62a ) and high - precision , low - noise and low - power codec uda1380 . software : program all kinds of driver and application programmer in the linux environment
  本系统中,硬件方面:嵌入式处理器选用arm9s3c2410 ,无线传输模块选用cc1000 ,声音采集模块选用麦克wm - 62a和高精度、低噪声、低功率的音频编码解码芯片uda1380 。
• In this paper , the streaming media technology applied to network video monitor system are researched on the basis of video streaming . the emphases are put on system design , video captures and play , and the design of network transmission module and relevant software development method . in fact , uality of service of the network has unstable characteristics , we have analyzed qos guarantee strategy in video streaming transmission on network , and presents a integrated qos guarantee scheme which based on data encapsulation , buffer storage technology and congestion control on network . this scheme do its best to avoid the big delay or congestion on network based on make full use of network bandwidth , which can guarantee the best qos of the video transmission
  重点讨论了系统架构、视频捕获和播放、网络传输模块设计以及相关软件开发方法。同时,针对实际网络中存在的服务不稳定性特点,分析了视频流在网络传输过程中的qos保证技术,并在系统中提出了基于数据封装、缓存技术以及网络拥塞控制机制的综合qos解决方案。该方案使系统在充分利用网络带宽的情况下最大程度上避免出现大的延迟或拥塞,保证了视频传输的最佳服务质量。
• The module of user agent need accomplish these tasks of making the message , analyzing the information , user agent , negotiating about the media . the module of real - time transport need complete these tasks of converting the data , coding and decoding the data and receiving and sending the packet . the module of management of the system ' s source need manage the keyboard and display and so on
  用户代理模块需要完成消息的接收和发送、消息的生成、消息的分析、用户代理的事务状态机管理、呼叫双方媒体流协商的功能；实时传输模块需要完成数据转换、数据的编解码、数据包的生成和分解及数据包的发送和接收；系统资源管理模块需要管理系统的键盘、用户界面等。
• Applying bluetooth technology into data sample and wireless transmission module can replace the data transmission cables in system , and has merits of convenience handle and flexible application , besides it can apply to comraan occasion it can also apply to temporary monitor and factory field , so it will get great application in factorys and enterprises
  利用蓝牙技术构建数据采集无线传输模块，可以减少系统间的电缆连接，具有携带方便、应用灵活等优点，除了应用于各种普通场合外，还可以应用于各种临时监测和野外操作的场合，因此在工矿、企业具有广泛的应用前景。
• On physical layer , it consists of a variety of ne ( network elements ) with different functions connected by optical fibre cables . compared with pdh , sdh is more widely used in fibre optical communication system these days . the reasons of the wide applicability of sdh are : first , it provides worldwide standards for electrical interface and optical interface , which can promote multi - vendor interoperability ; second , it has the feature of synchronous multiplexing and flexible mapping mechanism , so it can use stm - 1 signal to bundle atm cells , fddi signals as well as pdh signals
  Sdh之所以具有强大的生命力和广泛的适应性,主要有两个原因:提供统一标准的光接口和电接口,使不同厂家设备实现横向兼容;采用同步复用方式和灵活的映射结构,以基本传输模块stm - 1为桥梁,与原有的pdh信号实现纵向的前向兼容,与atm 、 fddi等数字体制实现后向兼容。
• In this paper the framework of a remote education system is presented based on the study of history , function , importance and disadvantages of remote education . and then the core techniques used in this system , including the processing and transformation of text , audio and video as well as the research and implementation of web database techniques , are introduced in detail
  本文在对远程教育的发展历程、作用和意义、发展现状以及存在的不足等方面进行详细分析和研究的基础上,构建了一套基于web的远程教育系统的总体构架,并详细介绍了系统实现的核心技术,包括文字、音视频处理和传输模块、 web数据库端模块的研究和实现技术。
• On the basis of analyzing the old system and theory , the element circuits of wireless digital audio transceiver modules are designed in detail including the digital audio encoding and decoding circuits with the surrounding circuits , the fsk circuit based on pll frequency synthesizer , the power amplifier circuit , the frequency discrimination and agc circuit
  在分析原系统结构和理论的基础上,完成了整个无线数字音频传输模块各单元电路的设计。主要包括有数字音频编码和解码电路及外围电路的设计、基于锁相频率合成器理论的fsk电路设计、功率放大器的设计、鉴频与agc控制电路的设计。
• Based on the above presentation the data sample and wireless transmission module with bluetooth system scheme is put forward , which made up of the data acquisition chip aduc812 and bluetooth module rok101008 , detailedly describes the design of every part of hardware circuit , the software program flow , the bluetooth communication flow and the instruction analysis
  在此基础上提出了本课题利用数据采集芯片aduc812和蓝牙模块rok101008所研制的数据采集蓝牙无线传输模块的系统方案，详细地叙述了各部分硬件电路的设计、软件程序流程的设计和蓝牙通信流程及指令分析。
• In this article , first , we theoretically research the wireless sensor network and wireless sensor node , second , we design and implement the hardware and software of wireless communication module . finally , we design and implement the hardware and software architecture of sound gathering
  在本文中,首先对无线传感器网络及其节点进行了理论研究;然后详细分析了无线传输模块的软硬件结构,研究其具体实现过程;在本文的最后对声音采集模块的软硬件结构进行了分析和设计。