601

BROADCASTING DIVISION Application Note The digital Video Standard according to ITU-R BT. 601/656 Products: CCVS+COMPONENT GENERATOR SAF CCVS GENERATOR SFF DIGITAL VIDEO COMPONENT ANALYSER VCA 7BM19_0E ITU-R BT. 601 BROADCASTING DIVISION 2 Leveldiagram at the input of an A/D converter for the analogue component signals Y , CB , CR EY ECB ECR CR CB Y 255/1023 (FF.C h) 0/0 (00.0 h) 235/940 (EB.0 h) 16/64 (10.0 h) 1 0 +0.5 -0.5 255/1023 (FF.C h) 0/0 (00.0 h) 16/64 (10.0 h) 128/512 (80.0h) 240/960 (F0.0 h) 0 ITU-R BT. 601 BROADCASTING DIVISION 3 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 ITU-R BT. 601 BROADCASTING DIVISION 4 Data format and timing relationship with the analogue video signal E A V S A V Audio, EDH, Data (ANC) Videodata-MultiplexCB Y CR Y CB Y CR Y ............ E A V horizontal blanking analogue 0H 16 T (625) 8 T (525) 24 T (625) 32 T (525) 24 T (625) 32 T (525) 0H blanking interval digital 288 T (625) 276 T (525) digital line 1728 T (625) 1716 T (525) 4 T 4 T Video Data 1440 T ITU-R BT. 601 BROADCASTING DIVISION 5 structure of digital synchronizing signals code word bit number 9 8 7 6 5 4 3 2 1 0 first word ( FF.C) second word ( 00.0) third word ( 00.0) fourth word ( XY.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 ITU-R BT. 601 BROADCASTING DIVISION 6 Table of values for V, F in VBI interval to be marked line number system 525/60 system 625/50 digital vertical blanking interval field 1 start (V=1) 1 624 end (V=0) 10 23 field2 start (V=1) 264 311 end (V=0) 273 336 digital field field 1 start (F=0) 4 1 field 2 start (F=1) 266 313 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. ITU-R BT. 601 BROADCASTING DIVISION 7 Table of controlbits const. F V H P3 P2 P1 P0 const. const. XY.0 level dec. 1 0 0 0 0 0 0 0 0 0 80.0 128.0 active SAV 1 0 0 1 1 1 0 1 0 0 9D.0 151.0 1st field picture EAV 1 0 1 0 1 0 1 1 0 0 AB.0 171.0 VBI SAV 1 0 1 1 0 1 1 0 0 0 B6.0 182.0 EAV 1 1 0 0 0 1 1 1 0 0 C7.0 199.0 active SAV 1 1 0 1 1 0 1 0 0 0 DA.0 218.0 2nd field picture EAV 1 1 1 0 1 1 0 0 0 0 EC.0 236.0 VBI SAV 1 1 1 1 0 0 0 1 0 0 F1. 0 241.0 EAV BROADCASTING DIVISION 8 Signal Timing and Levels (parallel interface) data clock t d t T ECL level timing reference for data and clock Clock-to-data Timing (at source) -0.8 V -1.6 V -0.8 V -1.6 V > > > < < < clock period (625): T = 1/ (1728 x f H) = 37.037 ns clock period (525): T = 1/ (1716 x f H) = 37.037 ns clock pulse width: t = 18.52 ± 3 ns data timing - sending end: t d = 18.5 ± 3 ns f H = line frequency variation of data timing - sending end in SAF and SFF : 18.5 ± 10 ns ITU-R BT. 601 BROADCASTING DIVISION 9 Connector contact assignments The connector's contacts, numbered in the standard manner depicted below must be assigned in accordance with the following table Contact Assignment Contact Assignment 1 clock 14 clock return 2 system ground 15 system ground 3 data 9 (MSB) 16 data 9 return 4 data 8 17 data 8 return 5 data 7 18 data 7 return 6 data 6 19 data 6 return 7 data 5 20 data 5 return 8 data 4 21 data 4 return 9 data 3 22 data 3 return 10 data 2 23 data 2 return 11 data 1 24 data 1 return 12 data 0 25 data 0 return 13 chassis ground 1 2 3 4 5 6 7 8 9 1 0 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Connector containing male pins (plug) ITU-R BT. 601 BROADCASTING DIVISION 10 Serial System Parameters ITEM 4 : 2 : 2 (D1) 4 x fSC PAL (D2) 4 x fSC NTSC (D2) total bit rate Mb / s 270.0 177.3 143.2 resolution 10 (8) bit / word channel coding scrambled NRZI by G(x) = ( x9 + x4 + 1) ( x + 1) serial sync word 3FF, 000, 000 hex (10 bit) order of transmission LSB first nominal signal level 800 mV ± 10% (terminated) code limitation 000 through 003 and 3FC through 3FF shall not appear in any data words ITU-R BT. 601 BROADCASTING DIVISION 11 serial 270 Mbit / sec Diagram of transmitter and receiver line p ar al le l/ se ri al D at a In p u t S ca m b le r N R Z/ N R ZI E C L O ut pu t 75 O hm 75 O hm c ab le eq ua lis er S ig n al - p ro ce ss o r N R ZI / N R Z D es cr am bl er O u tp u t B uf fe r se ri al / p ar al le l ITU-R BT. 601 BROADCASTING DIVISION 12 serial 270 Mbit / sec 2 2 2 1 1 1 x9 + x4 + 1 Output x + 1 Output x + 1 Output (complementary) 18 bit 18 bit 19 bit 19 bit 19 bit 19 bit Signal for Testing the Cable Equaliser Pathological Signals for 10 bit Serial Interface ITU-R BT. 601 BROADCASTING DIVISION 13 serial 270 Mbit /sec 1 1 1 x9 + x4 + 1 Output x + 1 Output x + 1 Output (complementary) 20 bit Signal for Testing the PLL in the Receiver 19 bit 19 bit 20 bit 20 bit 20 bit Pathological Signals for 10 bit Serial Interface ITU-R BT. 601 BROADCASTING DIVISION 14 SAF / SFF Signalgroup ITU-R BT. 601 (Option) Signaloverview according to ITU-R BT. 801 CCIR 601 1 GREY LEVEL 21 PATHOL.SIGNAL Y=088h C=100h 2 ALTERNATING BLACK/WHITE 22 PATHOL.SIGNAL Y=044h C=080h 3 EOL PULSE 23 PATHOL.SIGNAL Y=022h C=040h 4 BLACK/WHITE 24 PATHOL.SIGNAL Y=011h C=020h 5 RAMP YELLOW/GREY 25 PATHOL.SIGNAL Y=008h C=210h 6 RAMP GREY BLUE 26 PATHOL.SIGNAL Y=198h C=108h 7 RAMP CYAN GREY 27 PATHOL.SIGNAL Y=004h C=300h 8 RAMP GREY RED 28 PATHOL.SIGNAL Y=0CCh C=180h 9 RAMP CB Y CR Y 29 PATHOL.SIGNAL Y=066h C=0C0h 10 EOL BAR WHITE 30 PATHOL.SIGNAL Y=033h C=060h 11 EOL BAR BLUE 31 PATHOL.SIGNAL Y=019h C=230h 12 EOL BAR RED 32 PATHOL.SIGNAL Y=00Ch C=318h 13 EOL BAR YELLOW 33 PATHOL.SIGNAL Y=006h C=18Ch 14 EOL BAR CYAN 34 DIG.COL.BARS 100/0/100/0 15 SEQUENCE 1010 35 DIG.COL.BARS 100/0/75/0 16 SEQUENCE 11001100 36 RAMP Y 17 SEQUENCE 111000111000 37 RAMP Y CB CR 18 SDI CHECK FIELD 38 RAMP CB 19 PATHOL.SIGNAL Y=198h C=300h 39 RAMP CR 20 PATHOL.SIGNAL Y=110h C=200h ITU-R BT. 601 BROADCASTING DIVISION 15 Pathological Signals 1. Pathological Signals for Cable Equalizers in the Serial Digital Interface Possible word combinations to generate a stress pattern for cable equalization . Hex Validity No. chroma luminance 4 : 2 : 2 D1 1st sample 2nd sample 10 bit 8 bit 1 200 h 331 h yes no 2 300 h 198 h yes yes 3 180 h 0CC h yes yes 4 0C0 h 066 h yes no 5 060 h 033 h yes no 6 230 h 019 h yes no 7 318 h 0CC h yes yes 8 18C h 006 h yes no 2. Pathological Signals for Genlock of PLL in the Serial Digital Interface Possible word combinations to generate a stress pattern for genlock of PLL . Hex Validity No. chroma luminance 4 : 2 : 2 D1 1st sample 2nd sample 10 bit 8 bit 1 200 h 110 h yes yes 2 100 h 088 h yes yes 3 080 h 044 h yes yes 4 040 h 022 h yes no 5 020 h 011 h yes no 6 210 h 008 h yes yes 7 108 h 004 h yes yes ITU-R BT. 601 BROADCASTING DIVISION 16 SDI Check Pattern (serial digital interface) < >H active period 300, 198 (values in hex) C, Y (for cable equalizer) 200, 110 (values in hex) C, Y (for PLL) ITU-R BT. 601 BROADCASTING DIVISION 17 frequency jitter 0 max Quartz PLL LC PLL 1 KHz 200 KHz 10 KHz 2 MHz up to 270 MHz PLL follows the datajitter, no errors occur within a jitter range of some clock periods ( UI * ) PLL follows only partwise the datajitter, a rest- jitter remains, errors occur while reclocking the data this frequency range is outside the PLL locking bandwidth and therefore is this jitter not trans- ferred to the regenerated clock > Jitter of a Serial Digital Interface Signal frequency jitter 0 max Quartz PLL LC PLL 1 KHz 200 KHz 10 KHz 2 MHz up to 270 MHz > ^ < 0.5 UI* * UI = Unit Interval (clock period), at 270 Mbit/s 1UI = 3.7 ns ITU-R BT. 601 BROADCASTING DIVISION 18 Technical Data for Option S.F - Z1 Standard ITU-R BT. 601 / 656 (4:2:2) SMPTE 125M / 259 M Systems 625 lines/50 Hz and 525 lines/60 Hz Signals according to ITU-R BT. 801 pathological signals for SDI all SAF/SFF signals Parallel output 27 Msamples/sec level ECL level rise/fall time (20/80%) < 5 ns clockpulse width 18.5 ns ± 3ns delay clock/data 18.5 ns ± 3 ns clock/data shifting ± 10 ns connector 25 pin SUB D (ISO 2110 - 1980) Serial output 270 Mbit / sec acc. D1 format level VPP = 800 mV ± 10% @ 75 W rise/fall time (20/80%) 0.75....1.5 ns output impedance 75W return loss ³ 15 dB within 10... 270 MHz connector BNC ITU-R BT. 601 BROADCASTING DIVISION 19 The SAF/SFF option "CCIR 601" has advanced possibilities: l parallel and two serial outputs with 8 / 10 bit resolution and 27 Msamples / sec and 270 Mbit / sec l the 10 th bit has additional funktion in all three components Y, Cb, Cr : - toggle bit for quantization noise measuring - settable to 0 or 1 for measuring the scaling factor mV / LSB l adjustable rise / fall times of signaltransitions allow precise measurement of luma / chroma delay l output and variation in amplitude, timing and phase of all SAF / SFF testsignals ( testpatterns, ZONE PLATES, linearities...) including the self generated ones l special ITU-R BT. 601 testsignals are - signals according to ITU-R BT. 801 - all pathlogical signals l no PC needed for changing the signals´ - amplitude in Y, Cb, Cr independently from eachother - timing with the PHASE/TIME menu or using features of SIGNAL EDIT So you are able to test DSP machines ( trick mixers, frame stores ...) also at the limits of the system. ITU-R BT. 601 BROADCASTING DIVISION 20 l the amplitude limits are - max. 254 dec / FE hex for 8 bit 1019 dec / 3FB hex for 10 bit - min. 1 dec / 01 hex for 8 bit 4 dec / 04 hex for 10 bit l editing the H frequency allows changing the number of auxilliary data between EAV and SAV to check the sychronizing digital equipment. l the onscreen comparision of the digital signal and the composite or component signal shows immediately defects and differences of the DSP l the vertical blanking interval ( VBI ) is not influenced by the coding according to ITU-R BT. 601; the inserted VITS are part of the digital data. This is most useful for testing the influence of DSP in digital machines in the VBI. Additional Information Our Application Notes are regularly revised and updated. Check for any changes at http://www.rohde-schwarz.com. Please send any comments or suggestions about this Application Note to: