数字电视地面 meaning in Chinese
dttb
Examples
- Dvb - t ( digital video broadcasting ) specification is one of the dttb standards . it has better results in digital television program terrestrial reception test and has good appraisement in digital television broadcasting industry
Dvb - t ( digitalvideobroadcasting )是目前国际认可的数字电视地面广播标准之一，也是广播电视业及多国数字地面电视接收测试中评价最高的地面电视广播标准。 - In this paper , we first introduce the development of high definition television in our country and the principle of cofdm technique , followed by comparing the two channel transmission standards between atsc and dvb - t for digital terrestrial television
本文介绍了高清晰度数字电视在国内的发展状况，并将国际上的两大数字电视地面广播信道传输标准atsc和dvb - t进行了比较，在此基础上进一步阐明cofdm传输系统的原理和特点。 - Onjanuary22nd , 2005 , the “ zhongshi number one ” digital television ground transmission chip , independently researched by microelectronic research institute of fudan university and produced by shanghai hongli semiconductor and smi , passed the technical evaluation hosted by ministry of education and participated by academicians from chinese academy of sciences and chinese academy of engineering
2005年1月22日，由复旦大学微电子研究院自主设计、上海宏力半导体和中芯国际本土制造的“中视一号”数字电视地面传输芯片，通过了由国家教育部主持、中国工程院和中国科学院院士参与的技术鉴定。 - This thesis based on europe dvb - t cofdm ( coded orthogonal frequency division multiplexing ) system , does a lot of research from the development , the technique instrument of dttb to the whole dvb - t system structure and system flow . then brings forward its own ideas and optimizing advices after the stimulation of normal dvb - t system . firstly the thesis describes the needed conditions , the technical difficulties and the present problems of dttb
本课题就是基于欧洲dvb - tcofdm系统技术，从当前数字电视地面广播的发展，数字电视地面广播标准的技术手段到完整的dvb - t系统流程，做了一定的研究工作，并根据标准dvb - t系统做了建模仿真和分析，提出了对dvb - t系统的认识和优化设想。 - And pays emphasis on analyzing the system structure and system flow , the core techniques , the channel characteristic and parameters of dvb - t system . the system adopts some core techniques such as cofdm , a lot of tps ( transmission parameter signalling ) insert and guard interval , and so on . so it can withstand high - level ( up to odb ) , long delay static and dynamic multipath distortion
论文首先描述了数字电视地面广播的需求条件，技术难点和目前存在的问题，并重点分析了dvb - t系统结构流程，核心技术及系统信道特性和参数，该系统采用了cofdm (编码正交频分多路复用) ，大量导频信号插入和保护间隔技术等核心技术，使之能抵抗高电平( 0db ) ，长延时的静态和动态多径失真，有利于数字和模拟电视的混合传输，它的多载波调制模式功能和性能在移动和便携接收、同频网等方面具有独特的优势。