The subject has mainly finished designing and debugging software and hardware of a / d decode module , fpga video processing module , video data frame deposit module , base clock produce module , d / a encode module , i2c bus control module , etc . a / d decode module gathers analog tv signals and realize video decode ; fpga video processing module deals with the data after decoding and produces systematic logic control signal ; video data frame deposit module offers the buffering area to a large n umber of high - speed video data ; base clock produce module through input basic video signal offers system accurate relevant synchronous signal ; under control of video processing module d / a decode module convert digital video data into compound tv signal which can be shown in tv directly ; i2c bus control module is used to initialize the chip of system by simulating i * c bus timing 本课题主要完成了a d解码模块、 fpga视频处理模块、视频数据帧存模块、基准时钟产生模块、 d a编码模块、 i ~ 2c总线控制模块等部分软、硬件设计及调试。其中a d解码模块采集模拟电视信号实现视频解码; fpga视频处理模块对解码后的数据进行去噪处理的同时还负责系统的逻辑控制;视频数据帧存模块为大量高速的视频数据提供缓冲区;基准时钟产生模块通过输入基准视频信号为系统提供精确的相关同步信号; d a编码模块在视频处理模块的控制下把数字视频数据转换成复合电视信号供显示用: i ~ 2c总线控制模块模拟i ~ 2c总线时序实现对系统中编、解码芯片的初始化。
基准: datum standard; criterion; r ...视频: video frequency; vision freq ...基准视频同步: reference video synchronization基准视线: basic line of sight标准视频: normal video准视频点播: near-video-on-demand (nvod); nvod near video on demand; nvod near video ondemand; ob nea video on demand; ob near video on demand; q-vod quasi video on demand; quasi-video on demand nvod基准视在功率: basic apparent power标准视频信号: video standard signal准视频点播服务: q-vod quasi video-on-demand发出标准视频信号的电视测试设备: phasmajector标准视程: standard visual range标准视窗: normal window标准视距: normal line of sight标准视力: standard vision标准视力表: standard visual acuity chart标准视图: normal view瞄准视差: sight parallax照准视线: collineation基准: 1.[测量学] (测量时的起算标准) datum2.(泛指标准) standard; criterion; reference; basic standard◇基准点 reference point; datum point; 基准色 reference colours视频: [物理学] video frequency (v.f.); vision frequency; visual frequency; video◇视频变频器[变换器] video converter; 视频电话 visual telephone; 视频放大 video amplification; 视频鉴别 video discrimination; 视频显示 video-frequency display; video-frequency presentation; vf presentation; 视频载波 video carrier; 视频装置 video-unit调准视线;使平行: collimate用于数字地面电视的数字视频广播基准系统: dvb-t光标对准视觉锐度: vernier acuity校准视差指示器: parallax correction finder游标对准视觉锐度: vernier acuity