【作者】 刘光远；

【导师】 李德华；

【作者基本信息】 华中科技大学 ， 模式识别与智能系统， 2008， 硕士

【摘要】 随着科学技术的发展和人们生活水平的提高,数字化是广播电视发展的必然趋势,而高清晰度数字电视又是数字电视发展的必然趋势。我国在过去几十年的时间里,积累了上亿小时的SDTV的节目,其中不乏一些有重要价值的视频文件,这些节目,大部分还要播出,因此,在电视台广播节目的时候,要把这些节目转换为HDTV格式。另外大量新闻节目拍摄在相当长时间内还必须采用SDTV方式,然后转为HDTV格式才能在电视台播放。标清电视信号转高清电视信号转换卡就是在这一时代背景下产生的。它的主要功能是实时的将SDI接口输入的标准清晰度电视信号转换成高清晰度电视信号。采用加拿大Gennum公司的GF9351芯片来处理整个系统。该芯片系统集成度高,能做到视频的缩放、亮度、色度、对比度的调整合噪声消除。我们以GF9351芯片为处理核心,开发了一种基于图像处理片上系统的实时视频处理转换卡,该转换卡能实时的将PAL制标准清晰度数字电视信号转换为高清晰度数字电视信号,而且成本低,设计周期短,给产品设计提供了有利的条件。本文对转换卡的硬件设计进行了详细的介绍,包括所使用的主要处理芯片。给出了整体硬件方案,包括串/并转换、音频提取、标清到高清视频转换、音视频的合成以及输出并/串转换。分析了版图设计中的分层情况,布局、布线问题,以及制板过程中所涉及的高速数字电路设计中的主要问题。最后,分析了应用软件系统以及用来初始化GF9351处理器的VIPER软件。更多还原

【Abstract】 As the developing of technology and the improving of the people’s standard of living,the television system is changing from annlog TV system to digital TV system.In the near future,High Definition Television(HDTV) will surely take place of Standard Definition Television(SDTV).So we need a equipment to convert SDTV programs to HDTV programs.The format conversion board for SDTV to HDTV come into reality under this background mentioned above.Its main function is that it can change the format of the SDTV signals into HDTV signals through SDI(Serial Digital Interface) interface,then the signals will be stored in HDTV video recorder.SDI is interface that transports every bit of data through one channel.The receiving port should extract the clock signal in data streams,because SDI don’t transport the clock signal separately.The SDI signal receiving chip produced by Gennum corps can do this work very well.In this thesis,we studied the method for convert SDTV signals to HDTV signals.And we used a Gennum’s GF9351 as a core image processor to develop a video format conversion system.It focuses on the study of a 10-bit image processing system-on-chip,and then developed a real-time video processing system.It can convert PAL SDTV signals to HDTV signals.This thesis introduces the hardware design of the conversion board in detail.Include the main processing chip,the technology in High-speed digital circuit design which is necessary for the PCB.更多还原