数字视频格式及时序.doc

数字视频格式及时序从Consumer产品到Broadcast产品接触到的数字化的处理越来越多，模拟的越来越少。以前关注模拟视频的分析测试，现在则越来越多的要应对数字视频信号的处理。1：这里列出一些常用的数字视频格式及时序以做参考。NameHactVactHtotVtotSTF/sHSYNC/sMSa/sHbnkVbnkHS2HA480i60720480858525i29.9715734.2513.513845122576i50720576864625i251562513.514449132480p60720480858525p59.9431468.52713845122576p50720576864625p50312502714449132720p2412807204125750p23.9761798274.176284530260241800074.25720p2512807203960750p251875074.25268030260720p3012807203300750p29.9722477.574.176202030260302250074.25720p5012807201980750p503750074.2570030260720p6012807201650750p59.944495574.17637030260604500074.251080i501920108026401125i252812574.25720451921080i601920108022001125i29.9733716.2574.17628045192303375074.251080p241920108027501125p23.9762697374.17683045192242700074.251080p251920108026401125p252812574.25720451921080p301920108022001125p29.9733716.2574.17628045192303375074.251080p501920108026401125p5056250148.5720451921080p601920108022001125p59.9467432.5148.352280451926067500148.5符号 单位 描述Name n/a Industry standard concise name for format视频标准Hact pels Active Pixels Per Line水平有效像素Vact lines Active Lines per Frame每帧有效行数Htotpels Total Pixels Per Line每行总样本数Vtot lines Total Lines per Frame每帧总行数ST n/a Scan Type (i=interlaced, p=progressive)扫描类型（i-隔行扫描，p-逐行扫描）F/s F/s Frames per second帧频（Hz）HSYNC/sF/s HSYNC frequency/line pre second行频（Hz）MSa/s MHz Samples per second (i.e. pixel clock frequency)抽样频率Hbnk pels Blank Pixels per Line水平消隐间隔Vbnk lines Blank Lines per Frame垂直消隐间隔HS2HA pels HSYNC asserting edge to start of HACTIVE (in pels)有效起始像素/行同步信号有效触发沿到有效行之间的抽样时钟周期2:数字视频区分奇/偶场的办法除了用逻辑分析仪看SAV/EAV值外最简单的方法是比较VSYNC和HSYNC信号的相位。如图所示，奇场的VSYNC和HSYNC的触发沿是对齐的，而偶场的VSYNC距离HSYNC的触发沿的位置大概在行扫描周期一半的位置。3:1080i60和1080I/30两种表述方式的由来：其实这两种表述都指的是同一个视频格式：都是每秒60场（30帧）的隔行扫描。1080I/30 是European Broadcasting Union（EBU）组织的习惯表述方式，EBU习惯用帧频来表述。同理1080i50对应1080I/25也是