数字传输

"As compared with the application of analog channel transmission, the application of digital channel transmission is advantageous as follows:"

与采用模拟信道传输相比，采用数字信道传输有以下主要优点

Then the digital signal is processed in digital field. At last DPTV converts the digital signal into analog signal and display.

数字处理电视是在模拟广播电视传输体制下，将接收到的模拟电视信号转换成数字信号，经过数字处理后再转换为模拟信号并显示输出。

Digital baseband transmission system is an important component of communications transmission systems.

数字基带传输系统是通信传输系统中的重要组成部分。

Improve pixel camera, the digital interpolation to increase ordinary resolution would be tantamount to fraud, in the definition and image quality without any improvement; On the other hand to improve the image quality and resolution, the amount of data is bound to geometry class increase the number of not only USB protocol can not keep up the speed of data transmission, data transmission networks also can not keep up.

摄像头提高像素的话，一般通过数字插值提高分辨率，这就等于弄虚作假，在清晰度和图像质量方面没有任何改进；另一方面若要提高图像质量，提高分辨率，数据量就必然几何级数地增加，不但USB协议的数据传输速度跟不上，网络数据的传输更跟不上。

The enhanced direct memory access is an important technology used for fast speed data transfer in data signal processor.EDMA is able to move data block independent of CPU, and this capability meets real-time image processing.

增强型直接内存存取是数字信号处理器中用于快速数据交换的重要技术，具有独立于CPU 的后台批量数据传输的能力，能够满足实时图像处理中高速数据传输的要求。

Discontinuous transmission is an important function in mobile communication.

1引言非连续传输技术(Discontinuous Transmission，简称DTx)又称话音激活技术，是数字蜂窝移动通信系统十分重要的功能之一，它通过动态检测输入端的有话音时段和无话音时段，改变话音编码速率，以达到降低无话音时段的信息传输流量，同时自动调整发射机的开和关，即只在输入端有话音

With rapid advancements of digital video, however, there is lots of digital video systems having different spatio-temporal sampling ratio, having different standards and different formats, having different display equipment, in order to carry out different formats conversion.

随着数字视频技术迅速发展，产生了各种数字视频系统，具有不同的时空分辨率要求，导致了不同的格式的存贮，传输和显示数字视频的标准出现。

Companies specializing in digital network monitoring, digital video and data communications product research and development and production, successful research and development Tigereye series, Cerberus series of MPEG-1, MPEG-4, H.264 network monitoring systems and digital audio and video acquisition card, SupeScan power, the environment and image monitoring system, JS series Guangduan Ji, data multiplexer, data-machine, E1/10Base-T/V3.5 converters, optical transceiver, communications transmission Access and interface protocol converter products.

公司专业从事数字网络监控、数字视频和通信数据产品的研发与生产，成功地研发Tigereye系列、Cerberus系列MPEG-1、MPEG-4，H.264数字网络监控系统及音视频采集卡，SupeScan动力、环境及图像监控系统，JS系列光端机、数据复用器、数据交叉机、E1/10Base-T/V3.5转换器、光纤收发器等，通信传输接入、接口协议转换器产品。

Meanwhile, there need a further study in digital TV MUDS transmission system in countryside and outlying district.

本文结合四川宜宾广播电视局的数字电视MUDS系统及工程项目情况，提出了一个实际的应用解决方案，为边远地区和分散的农村地区的数字电视系统的实施提供一个理想传输的选择平台，解决了边远地区和分散的农村地区的用户收看数字电视节目的困难。

This thesis presents the design and implementation of a web digital vidicon. The web digital vidicon is an important part of the digital video surveillance system, which is based on the technology of embedded system, and it implements video capture, compression and network transmission.

本论文设计并实现了一种网络数字摄像机方案，网络数字摄像机是数字视频监控系统的主要部分，它结合了嵌入式系统技术，完成前端的视频采集和压缩功能，并能利用网络的优势进行视频网络传输。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。