数字电视地面广播 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。 - 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。 - Dttb ( digital television terrestrial broadcasting ) is one of the present digital television broadcasting modes , whose transmission media is earth . after a decade of intense research and development , the standards of digital television satellite broadcasting and digital television cable broadcasting have been confirmed . but the standard of digital television terrestrial broadcasting is still in disputation , for its transmission environment is rather awful , its spectrum resource is very limited and its service required is disperse , so it is potential to be improved in many aspects
数字电视广播发展近十年来，卫星和有线电缆广播的基本传输体制已确定，而地面广播由于传输环境恶劣，频谱资源有限，应用需求分散，其标准在各国仍有极大的争议，因为目前没有一套标准能解决实际地面传输中的所有问题，因此数字电视地面广播在许多方面都有很大的改进潜力。