1、 Recommendation ITU-R BT.1543-1 (06/2015) 1 280 720, 16:9 progressively-captured image format for production and international programme exchange in the 60 Hz environment BT Series Broadcasting service (television) ii Rec. ITU-R BT.1543-1 Foreword The role of the Radiocommunication Sector is to ensu
2、re the rational, equitable, efficient and economical use of the radio-frequency spectrum by all radiocommunication services, including satellite services, and carry out studies without limit of frequency range on the basis of which Recommendations are adopted. The regulatory and policy functions of
3、the Radiocommunication Sector are performed by World and Regional Radiocommunication Conferences and Radiocommunication Assemblies supported by Study Groups. Policy on Intellectual Property Right (IPR) ITU-R policy on IPR is described in the Common Patent Policy for ITU-T/ITU-R/ISO/IEC referenced in
4、 Annex 1 of Resolution ITU-R 1. Forms to be used for the submission of patent statements and licensing declarations by patent holders are available from http:/www.itu.int/ITU-R/go/patents/en where the Guidelines for Implementation of the Common Patent Policy for ITU-T/ITU-R/ISO/IEC and the ITU-R pat
5、ent information database can also be found. Series of ITU-R Recommendations (Also available online at http:/www.itu.int/publ/R-REC/en) Series Title BO Satellite delivery BR Recording for production, archival and play-out; film for television BS Broadcasting service (sound) BT Broadcasting service (t
6、elevision) F Fixed service M Mobile, radiodetermination, amateur and related satellite services P Radiowave propagation RA Radio astronomy RS Remote sensing systems S Fixed-satellite service SA Space applications and meteorology SF Frequency sharing and coordination between fixed-satellite and fixed
7、 service systems SM Spectrum management SNG Satellite news gathering TF Time signals and frequency standards emissions V Vocabulary and related subjects Note: This ITU-R Recommendation was approved in English under the procedure detailed in Resolution ITU-R 1. Electronic Publication Geneva, 2015 ITU
8、 2015 All rights reserved. No part of this publication may be reproduced, by any means whatsoever, without written permission of ITU. Rec. ITU-R BT.1543-1 1 RECOMMENDATION ITU-R BT.1543-1 1 280 720, 16:9 progressively-captured image format for production and international programme exchange in the 6
9、0 Hz environment (Question ITU-R 1/6) (2001-2015) Scope This Recommendation defines the digital image parameters for the 1 280 720, 16:9 progressively-captured image format for production and international programme exchange in the 60 Hz environment.1 Keywords Progressive, 1 280 720 The ITU Radiocom
10、munication Assembly, considering a) that digital content production will increasingly include a mixture of audio, video, data and interactive content; b) that digital production equipment is increasingly designed to operate with a variety of image formats including 1 280 720, 16:9, progressively-cap
11、tured (720/P); c) that production-quality conversion from progressive to other formats is easy to achieve; d) that 720/P format at 30/60 Hz provides a useful set of vertical-temporal/compressed bit rate options; e) that a 720/P production format offers an effective format for high vertical temporal
12、resolution carried within the commonly used 1.5 Gbit/s production serial digital interface; f) that a maximum of commonality with the parameter values of Recommendation ITU-R BT.709 is advantageous for interchange; g) that the 720/P format provides a set of spatial characteristics between Recommenda
13、tions ITU-R BT.601 and ITU-R BT.709, which is an efficient option for certain applications of acquisition, production and storage; h) that image format interoperability with computer applications is increasingly important, and the 720/P format is well matched to them, recommends 1 that, for producti
14、on and international programme exchange in the 60 Hz environment, in the 1 280 720 image format, the parameters in Annex 1 should be used. 1 Previous versions of this Recommendation that may contain historic information can be found on the ITU website. 2 Rec. ITU-R BT.1543-1 Annex 1 1 280 720 progre
15、ssive capture system Introduction This image format is defined to have common picture parameter values independent of the picture rate including the common system reference clock frequency of 74.25 MHz. The following picture rates are specified in this Annex: 60 Hz, 60/1.001 Hz, 30 Hz, 30/1.001 Hz.
16、Pictures are defined for progressive capture (P) only. 1 Opto-electronic conversion Item Parameter Value 1.1 Opto-electronic transfer characteristics before non-linear pre-correction Assumed linear 1.2 Overall opto-electronic transfer characteristics at source2 V 1.099 L0.45 0.099 for 1 L 0.018 V 4.
17、500 L for 0.018 L 0 where: L : luminance of the image 0 L 1 V : corresponding electrical signal 1.3 Chromaticity coordinates (CIE, 1931) x y Primary: Red (R) Green (G) Blue (B) 0.640 0.300 0.150 0.330 0.600 0.060 1.4 Assumed chromaticity for equal primary signals (reference white): D65 x y ER EG EB
18、0.3127 0.3290 2 Picture characteristics Item Parameter Value 2.1 Aspect ratio 16:9 2.2 Samples per active line 1 280 2.3 Sampling lattice Orthogonal 2.4 Active lines per picture 720 2.5 Pixel aspect ratio 1:1 (square pixels) 2 In typical production practice the encoding function of image sources is
19、adjusted so that the final picture has the desired look, as viewed on a reference monitor having the reference decoding function of Recommendation ITU-R BT.1886, in the reference viewing environment defined in Recommendation ITU-R BT.2035. Although some parameters listed in Recommendation ITU-R BT.2
20、035 are intended for HDTV signal viewing, scaled viewing distances for 1 280 720 image format should be used. Rec. ITU-R BT.1543-1 3 3 Signal format Item Parameter Value 3.1 Conceptual non-linear pre-correction of primary signals 0.45 (See Item 1.2) 3.2 Derivation of luminance signal YE YE 0.2126 RE
21、 0.7152 GE 0.0722 BE 3.3 Derivation of colour-difference signal (analogue coding) 8556.1 YBCB EEE 8556.1 9278.07152.02126.0 BGR EEE 5748.1 YRCR EEE 5748.1 0722.07152.07874.0 BGR EEE 3.4 Quantization of RGB, luminance and colour-difference signals(1), (2) 8216219IN T nRR ED 8216219IN T nGG ED 8216219
22、IN T nBB ED 8216219IN T nYY ED 82128224IN T nCBCB ED 82128224IN T nCRCR ED 3.5 Derivation of luminance and colour-difference signals via quantized RGB signals BGRY DDDD 0722.07152.02126.0I N T 122192248556.19278.08556.17152.08556.12126.0IN T nBGRCBDDDD 122192245748.10722.05748.17152.05748.17874.0IN
23、T nGRCRBDDDD (1) “n” denotes the number of the bit length of the quantized signal. (2) The operator INT returns the value of 0 for fractional parts in the range of 0 to 0.4999 . and +1 for fractional parts in the range of 0.5 to 0.9999 ., i.e. it rounds up fractions above 0.5. 4 Rec. ITU-R BT.1543-1
24、 4 Digital representation Item Parameter Value 4.1 Coded signal R, G, B or Y, CB, CR 4.2 Sampling lattice: R, G, B, Y Orthogonal, line and picture repetitive 4.3 Sampling lattice: CB, CR Orthogonal, line and picture repetitive co-sited with each other and with alternate(1) Y samples 4.4 Number of ac
25、tive samples per line: R, G, B, Y CB, CR 1 280 640 4.5 Coding format Linear 8 or 10 bits/component 4.6 Quantization levels: 8-bit coding 10-bit coding Black level: R, G, B, Y Achromatic: CB, CR Nominal peak: R, G, B, Y CB, CR 16 128 235 16 and 240 64 512 940 64 and 960 4.7 Quantization level assignm
26、ent: 8-bit coding 10-bit coding Video data Timing references 1 through 254 0 and 255 4 through 1 019 0-3 and 1 020-1 023 4.8 Filter characteristics(2): R, G, B, Y CB, CR See Fig. 1A See Fig. 1B (1) The first active colour-difference samples being co-sited with the first active luminance sample. (2)
27、These filter templates are defined as guidelines. Rec. ITU-R BT.1543-1 5 5 Picture capture characteristics Item Parameter Value 60/P, 59.94/P 30/P, 29.97/P 5.1 Order of sample presentation in a scanned system Left to right, top to bottom 5.2 Frame frequency (Hz) 60, 60/1.001 30, 30/1.001 5.3 Picture
28、 rate (Hz) 60, 60/1.001 30, 30/1.001 5.4 Samples per full line: R, G, B, Y CB, CR 1 650 825 3 300 1 650 5.5 Nominal channel bandwidths (MHz) (For R, G, B, Y components) 30 5.6 Sampling frequency (MHz): R, G, B, Y 74.25, 74.25/1.001 74.25, 74.25/1.001 5.7 Sampling frequency(1) (MHz) CB, CR 37.125, 37
29、.125/1.001 37.125, 37.125/1.001 (1) CB, CR sampling frequency is half of luminance sampling frequency. 6 Rec. ITU-R BT.1543-1 FIGURE 1A Filter characteristics for R, G, B and Y signals B T .1 5 4 3 - 0 1 AFre q u en cy (t imes )sa) T emp l at e fo r i n s ert i o n l o s sInsertionloss(dB)Fre q u en
30、 cy (t imes )sb ) Pas s b an d ri p p l e t o l eran ceFre q u en cy (t imes )sc) Pas s b an d g ro u p -d el ayInsertionloss(dB)Groupdelay()T0.1 5 T 0.2 2 T504030201000 0.40 0.50 0.60 0.73 1.0012 dB40 dB50 dB00.0500.050.400.1 dB00.1100.07500.0750.1100.27 0.40NOTE 1 s denotes luminance sampling freq
31、uency, the value of which is given in item 5.6. NOTE 2 Ripple and group delay are specified relative to the value at 100 kHz. Rec. ITU-R BT.1543-1 7 FIGURE 1B Filter characteristics for CB and CR signals B T . 1 5 4 3 - 0 1 BFreq u en cy (t i mes )sa) T emp l at e fo r i n s ert i o n l o s sFreq u
32、en cy (t i mes )sb ) Pas s b an d ri p p l e t o l era n ceFreq u en cy (t i mes )sc) Pas s b an d g ro u p -d el ay0 . 1 5 T 0 . 2 2 T504030201000 0 . 2 0 0 . 2 5 0 . 3 7 0 . 5 06 d B4 0 d B5 0 d B0 0 .0 50 . 0 50 . 2 00 . 1 d B0 0 .1 1 0 0 .0 7 50 . 0 7 50 . 1 1 00 . 1 4 0 . 2 00 . 3 000Groupdelay
33、()TInsertionloss(dB)Insertionloss(dB)NOTE 1 s denotes luminance sampling frequency, the value of which is given in item 5.6. NOTE 2 Ripple and group delay are specified relative to the value at 100 kHz. 8 Rec. ITU-R BT.1543-1 6 Analogue Tri Level Sync signal The trilevel sync signal may be used as a
34、 reference signal for synchronization of devices operating on this Recommendation. Item Parameter Value 6.1 Nominal level (mV): ,RE ,GE ,BE YE Reference black: 0 Reference white: 700 (See Fig. 2) 6.2 Nominal level (mV): ,BCE RCE 350 (See Fig. 2) 6.3 Form of synchronizing signal Tri-level bipolar (Se
35、e Fig. 4) 6.4 Line sync timing reference OH (See Fig. 4) 6.5 Sync level (mV) 300 2% 6.6 Sync signal timing Sync on all components (See Table 1, Figs 3 and 4) 6.7 Inter-component timing accuracy Not applicable 6.8 Blanking interval (See Table 2 and Fig. 3) 6.9 Total lines 750 FIGURE 2 Analogue levels
36、 and OH timing reference B T .1 5 4 3 - 0 2(mV )+ 7 0 0+ 3 0 00300+ 3 5 0+ 3 0 00300350Bl an k i n g i n t erv alO HE , E , E , E ,R G B YE E CC, B RRec. ITU-R BT.1543-1 9 TABLE 1 Level and line timing specification (See Figs 3 and 4) Symbol Parameter System values 60/P, 59.94/P 30/P, 29.97/P T Refe
37、rence clock interval (s) 1/74.25, 1.001/74.25 a Negative line sync width (T )(1) 40 3 b End of active video(2) (T ) 6 110 0 6 1 760 0 c Positive line sync width (T ) 40 3 d Clamp period (T ) 110 3 e Start of active video (T ) 6 260 0 f Rise/fall time (T ) 4 1.5 t2 t1 Symmetry of rising edge Symmetri
38、c about Tr Active line interval (T ) 0 1 280 12 Sm Amplitude of negative pulse (mV) 300 6 Sp Amplitude of positive pulse (mV) 300 6 V Amplitude of video signal (mV) 700 (1) T denotes the duration of a reference clock or the reciprocal of the clock frequency. (2) A line starts at line sync timing ref
39、erence OH (inclusive), and ends just before the subsequent OH (exclusive). 10 Rec. ITU-R BT.1543-1 TABLE 2 Frame timing specification (See Figs 3 and 4) Symbol Parameter System values 60/P, 59.94/P 30/P, 29.97/P H(1) Total line interval (T )(2) 1 650 3 300 h Vertical sync width (T ) 1 280 3 LT Top l
40、ine of picture No. 26 LB Bottom line of picture No. 745 WBL Frame blanking interval 30 H Start of frame No. 1 End of frame No. 750 (1) H denotes the duration of a line. A line starts at line sync timing reference OH (inclusive), and ends at just before the subsequent OH (exclusive). (2) T denotes th
41、e duration of a reference clock or the reciprocal of the clock frequency (see Table 1). FIGURE 3 Frame synchronizing signal waveform B T .1 5 4 3 - 0 3OVW B LV e r t i c a l i nt e r va lV e r t i c a l s yn c de t a i l5 HLBN o. 74 5N o. 1N o. 75 0 N o. 2 N o. 3 N o. 4 N o. 5 N o. 6 N o. 7LTN o. 26OHh1 l i neOHe Rec. ITU-R BT.1543-1 11 FIGURE 4 Line synchronizing signal waveform B T .1 5 4 3 - 0 4 a cb deOH90%Tr10%t1t2(T h e w av ef o rm ex h i b i t s s y mmet ry w i t h re s p ec t t o p o i n t T ) rS/2mSmV/2SpS/2p V/2_
