DVB中时钟恢复系统的设计与实现  

Design and implementation of clock recovery system in DVB

作　　者：高夫[1] 杜学亮[1] 金西[1] 

机构地区：[1]中国科学技术大学物理系微电子学教研室,合肥230026

出　　处：《电子测量技术》2007年第12期137-140,147,共5页Electronic Measurement Technology

摘　　要：介绍了一种数字视频广播DVB中时钟恢复系统的实现方法。本设计采用了一种数模混合的锁相环技术,该技术通过使用直接数字频率合成器及数字滤波器、借助SystemView建模,成功地恢复了系统时钟。所设计的用于测试的硬件系统,利用恢复的系统时钟实现了DVB中音频流和视频流的同步播放,充分证明了本设计的可行性和正确性。本设计采用的锁相环技术避免了使用压控振荡器,减少了芯片管脚,降低了设计成本。An implementation method of clock recovery system in DVB is introduced. By using the technology of mixedsignal PLL, which includes direct digital synthesizer, digital filter and SystemView modeling, this scheme is successfully used in resuming the system clock. The feasibility and correctness of this design is proved by synchronous playing of audio stream and video stream based on DVB in testing hardware system by using the resumed system clock. This technology of mixed-signal PLL, avoiding using VCO, decreases the number of pins and lowers the cost of design.

关 键 词：DVB时钟恢复系统 锁相环 系统时钟 

分 类 号：TN949.197[电子电信—信号与信息处理]