ITU-R+BT.601 数字视频标准.pdf

发布时间：2022-05-29 发布人：admin 分类：说明书资料大小：0.78M 资料格式：pdf 举报版权申诉

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BROADCASTING DIVISION Application Note The digital Video Standard according to ITU-R BT. 601/656 Products: CCVS+COMPONENT GENERATOR CCVS GENERATOR DIGITAL VIDEO COMPONENT ANALYSER SAF SFF VCA 7BM19_0E

ITU-R BT. 601 Leveldiagram at the input of an A/D converter for the analogue component signals Y , CB , CR 1 EY 0 255/1023 (FF.C h) 235/940 (EB.0 h) Y 16/64 (10.0 h) 0/0 (00.0 h) +0.5 ECB ECR 0 -0.5 255/1023 (FF.C h) 240/960 (F0.0 h) 128/512 (80.0h) 16/64 (10.0 h) 0/0 (00.0 h) CB CR BROADCASTING DIVISION 2

ITU-R BT. 601 Example for digital synchronizing signals in the parallel interface (10 bit ) EAV SAV D0 D1 D2 D3 D4 D5 D6 D7 D8 D9 black points indicate the value 1 , white points 0 XY within EAV is DA.0 ( 11011010 00) XY within SAV is C7.0 ( 1100011100 ) this significates this line an active one in an even field BROADCASTING DIVISION 3

ITU-R BT. 601 Data format and timing relationship with the analogue video signal horizontal blanking analogue 0H 16 T (625) 8 T (525) 24 T (625) 32 T (525) 24 T (625) 32 T (525) E A V 4 T Audio, EDH, Data (ANC) S A V Videodata-Multiplex CB Y CR Y CB Y CR Y ............ E A V 4 T blanking interval digital 288 T (625) 276 T (525) digital line 1728 T (625) 1716 T (525) Video Data 1440 T BROADCASTING DIVISION 0H 4

ITU-R BT. 601 structure of digital synchronizing signals code word first word second word third word fourth word ( FF.C) ( 00.0) ( 00.0) ( XY.0) bit number 9 8 7 6 5 4 3 2 1 0 1 1 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 F V H P3 P2 P1 P0 0 0 F = 0 first field F = 1 second field V = 0 or 1 ( in VBI ) H = 0 in SAV H = 1 in EAV P0, P1, P2, P3 see table of control bits BROADCASTING DIVISION 5

ITU-R BT. 601 Table of values for V, F in VBI interval to be marked digital vertical blanking interval field 1 start end field2 start end (V=1) (V=0) (V=1) (V=0) digital field field 1 start field 2 start (F=0) (F=1) system 525/60 line number system 625/50 1 10 264 273 4 266 624 23 311 336 1 313 The values of V and F change within the transmission of the EAV signal at the start of each digital line. The line numbers count according to ITU-R BT. 470; the number of the digital line changes at the reference point 0H. BROADCASTING DIVISION 6

ITU-R BT. 601 Table of controlbits const. 1 1 1 1 1 1 1 1 F 0 0 0 0 1 1 1 1 V H P3 P2 P1 P0 const. 0 0 1 1 0 0 1 1 0 0 0 0 0 0 0 0 0 1 0 1 1 0 1 0 0 0 1 1 1 1 0 0 0 1 1 0 1 0 0 1 0 1 0 1 0 1 0 1 0 1 1 0 0 1 1 0 const. 0 0 0 0 0 0 0 0 XY.0 80.0 9D.0 AB.0 B6.0 C7.0 DA.0 EC.0 F1. 0 level dec. 128.0 151.0 171.0 182.0 199.0 218.0 236.0 241.0 1st field 2nd field active picture VBI active picture VBI SAV EAV SAV EAV SAV EAV SAV EAV BROADCASTING DIVISION 7

Signal Timing and Levels (parallel interface) timing reference for data and clock ECL level -0.8 V -1.6 V data -0.8 V -1.6 V clock < t d > < < t > T > Clock-to-data Timing (at source) clock period (625): clock period (525): clock pulse width: data timing - sending end: f H = line frequency T = 1/ (1728 x f H) = 37.037 ns T = 1/ (1716 x f H) = 37.037 ns t = 18.52 – 3 ns t d = 18.5 – 3 ns variation of data timing - sending end in SAF and SFF : 18.5 – 10 ns BROADCASTING DIVISION 8

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ITU-R+BT.601 数字视频标准.pdf

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