数字传输

Digital fountain is a packet oriented forward error correction technology for channels with erasures, which has obvious efficiency advantage in broadcast.

摘要数字喷泉是近年发展起来的一类基于删除信道、面向数据分组的前向纠错编码技术，在广播类传输中具有明显的效率优势。

Based on the careful reasearch on digital audio signal, MP3 file ,which has high qulity tone and high compression ratio, finally become the audio format that can be processed and transport by this system .

论文通过对数字音频的深入研究，确定具有低失真和高压缩率的MP3文件作为系统处理和传输的音频文件格式。

DIGITAL, 2 active probe connectors, foldaway backlit keyboard, Super broadband multi-frequency probes, cineloop, Computer platform, Image and patient data storage(HDD, USD, option: CD-RW, FDD)Digital Beam-former, image transferable via PC or internet, DICOM 3.0 port and software.

数字化，2个有源探测连接器，折叠式背光键盘，超宽带多频探头，回放功能，电脑平台，图像和病人数据保存（HDD、USD，选项：CD-RW、FDD）数字波束形成器，图像可通过PC或因特网传输，DICOM 3.0端口和软件。

A flexible buffer was placed between the over-sampler and DPLL.Not only was 10bits data recovery implemented,but also the frequency of sampling clock was reduced to 2.5 times of the data frequency.The phase verification for 10bit parallel data by DPLL increases the accuracy rate of judgment and improves the bit error rate.

通过在过采样电路和数字锁相环之间增加弹性缓冲电路，在实现10bit数据恢复的同时，使采样时钟频率减小为数据频率的2.5倍，DPLL同时对10bit并行的数据进行相位检测判断，提高了判断的正确率，使数据传输的误码率得到改善。

Voice requests could be fed into a personal digital assistant , for example, which could compress the speech for transmission via radio or other medium at 4 kilobits/sec across the Internet.

例如，声音请求可以送进&个人数字助理&，该装置对话音进行压缩，以便在Internet网上以4Kb/s的速度通过无线电或其它介质传输。

Using the carrier to carry digital information in modern communication is a wides cation, such as PSK and QAM technologies, both of them need the carrier with sin wave.

在现代通信中利用载波携带数字信息的传输应用广泛，如PSK、QAM等调制技术均要用到正弦形式的载波。

RT9641ACS Pinout: The RT9641ACS is a quad differential line receiver designed to meet the RS-422, RS-423, and Federal Standards 1020 and 1030 for balanced and unbalanced digital data transmis- sion, while retaining the low power characteristics of CMOS.

RT9641ACS引脚说明：该RT9641ACS是一款四差分线路接收器，旨在满足的RS - 422和RS - 423，1020和联邦标准和平衡和不平衡的数字数据传输，锡永1030，同时保留了CMOS低功耗特性。

Based on an analysis on the present situation and development of three kinds of signal systems (the point system based on interrogator responsor, the quasi moving block system based on digital track circuit and the moving block system based on wireless data transmission) in urban rail transit, some suggestions on the localization of signal system of urban rail transit are put forward.

在分析三种城市轨道交通信号系统制式(基于查询应答器的点式系统、基于数字轨道电路的准移动闭塞和基于无线数据传输的移动闭塞)的现状和发展基础上，对实现我国城市轨道交通信号系统国产化提出建议。

They also understood that as the sunspot numbers increased during the eleven-year solar cycle, the critical cutoff frequency for long distance transmission also increased.

他们并且了解当黑点数字增加了在11 年的太阳周期期间，重要截止频率为长途传输并且增加了。

It can increase the automatic degree to sedimentation test as well as improve its test accuracy by on-line error compensation. And have the ability of field-bus communication and data storage, so the information can be communicated for long-distance or stored for long-term. With the SIMATIC S200 series PLC as a core and mated with the field-bus communication module and related components, I bring forward a complete design of hardware, and design some related procedure of the PLC and monitor computer.

本文将介绍一种基于数字信号处理和现场总线技术的新型高速公路沉降仪，不仅提高了沉降测试的自动化程度，而且通过在线误差补偿手段提高了测试精度，并且具备现场总线通讯和强大的数据存储能力，可实现信号的远距离传输或长期存储。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了