1、 Recommendation ITU-R BT.709-6 (06/2015) Parameter values for the HDTV standards for production and international programme exchange BT Series Broadcasting service (television) ii Rec. ITU-R BT.709-6 Foreword The role of the Radiocommunication Sector is to ensure the rational, equitable, efficient a
2、nd 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 the Radiocommunication Sector are perfo
3、rmed 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 Annex 1 of Resolution ITU-R 1. Forms t
4、o 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 patent information database can also be fo
5、und. 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 (television) F Fixed service M Mobile, ra
6、diodetermination, 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 service systems SM Spectrum management
7、 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 2015 All rights reserved. No part of t
8、his publication may be reproduced, by any means whatsoever, without written permission of ITU. Rec. ITU-R BT.709-6 1 RECOMMENDATION ITU-R BT.709-6 Parameter values for the HDTV1 standards for production and international programme exchange (Question ITU-R 27/11) (1990-1994-1995-1998-2000-2002-2015)
9、Scope This Recommendation defines the image format parameters and values for HDTV2. Keywords HDTV (high definition television), Image format, EOTF (electro optical transfer function), OETF (optical electrical transfer function), PsF (progressive segmented frame) The ITU Radiocommunication Assembly,
10、considering a) that for many years HDTV programmes have been produced worldwide; b) that parameter values for HDTV production standards should have maximum commonality; c) that the parameters defined for all these systems meet the quality goals set for HDTV; d) that film productions are an important
11、 programme source for HDTV broadcasting and, conversely, the use of HDTV production systems has significant benefits for film programme production; e) that high-quality conversion between the various HDTV systems, as well as down-conversion to 525/625 television systems, has been successfully implem
12、ented; f) that programmes produced and archived will have a long shelf life, recommends that for HDTV programme production and international exchange, one of the systems described in this Recommendation, should be used. 1 “A high-definition system is a system designed to allow viewing at about three
13、 times the picture height, such that the system is virtually, or nearly, transparent to the quality of portrayal that would have been perceived in the original scene or performance by a discerning viewer with normal visual acuity”. Report ITU-R BT.801. 2 Previous versions of this Recommendation that
14、 may contain historic information can be found on the ITU website. 2 Rec. ITU-R BT.709-6 HDTV system with square pixel common image format Introduction The common image format (CIF) is defined to have common picture parameter values independent of the picture rate. The following picture rates are sp
15、ecified: 60 Hz, 50 Hz, 30 Hz, 25 Hz and 24 Hz. For the 60, 30 and 24 Hz systems, picture rates having those values divided by 1.001 are also specified. Pictures are defined for progressive (P) capture and interlace (I) capture. Progressive captured pictures can be transported with progressive (P) tr
16、ansport or progressive segmented frame (PsF) transport. Interlace captured pictures can be transported with interlace (I) transport. Refer to Attachment 2 for a description of segmented frame transport. This results in the following combinations of picture rates and transports: System Capture (Hz) T
17、ransport 60/P 60 or 60/1.001 progressive Progressive 30/P 30 or 30/1.001 progressive Progressive 30/PsF 30 or 30/1.001 progressive Segmented frame 60/I 30 or 30/1.001 interlace Interlace 50/P 50 progressive Progressive 25/P 25 progressive Progressive 25/PsF 25 progressive Segmented frame 50/I 25 int
18、erlace Interlace 24/P 24 or 24/1.001 progressive Progressive 24/PsF 24 or 24/1.001 progressive Segmented frame Rec. ITU-R BT.709-6 3 1 Opto-electronic conversion Item Parameter System Values 1.1 Opto-electronic transfer characteristics before non-linear pre-correction Assumed linear 1.2 Overall opto
19、-electronic transfer characteristics at source(1) V 1.099 L0.45 0.099 for 1 L 0.018 V 4.500 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
20、1.4 Assumed chromaticity for equal primary signals (Reference white) D65 x y ER EG EB 0.3127 0.3290 (1) In typical production practice the encoding function of image sources is adjusted so that the final picture has the desired look, as viewed on a reference monitor having the reference decoding fun
21、ction of Recommendation ITU-R BT.1886, in the reference viewing environment defined in Recommendation ITU-R BT.2035. 2 Picture characteristics Item Parameter System Values 2.1 Aspect ratio 16:9 2.2 Samples per active line 1 920 2.3 Sampling lattice Orthogonal 2.4 Active lines per picture 1 080 2.5 P
22、ixel aspect ratio 1:1 (square pixels) 4 Rec. ITU-R BT.709-6 3 Signal format Item Parameter System Values3.1 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 0.7152 GE 0.0722 BE 3.3 Derivation of colour-difference signal (a
23、nalogue coding) 8556.1 EEE YBCB 8556.1 E9278.0E7152.0E2126.0 BGR 5748.1 EEE YRCR 5748.1 E0722.0E7152.0E7874.0 BGR 3.4 Quantization of RGB, luminance and colour-difference signals(1), (2) 8216219I N T nRR ED 8216219IN T nGG ED 8216219IN T nBB ED 8216219IN T nYY ED 82128224IN T nCBCB ED 82128224IN T n
24、CRCR ED 3.5 Derivation of luminance and colour-difference signals via quantized RGB signals BGRY DDDD 0722.07152.02126.0I N T 122192248556.1 9278.08556.1 7152.08556.1 2126.0 I N T nBGRCB DDDD 122192245748.1 0722.05748.1 7152.05748.1 7874.0I N T nGRCR BDDDD(1) “n” denotes the number of the bit length
25、 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. Rec. ITU-R BT.709-6 5 4 Digital representation Item Parameter System Values 4.1 C
26、oded 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 active samples per line R, G, B, Y CB, CR 1 920 960 4.5
27、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 assignment 8-bit coding 10-bit coding Video data Timing reference
28、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 Attachment 1 (1) The first active colour-difference samples being co-sited with the first active luminance sample. (2) These filter templates are defined as guidelines. 6 Rec. ITU-R BT.709
29、-6 5 Picture scanning characteristics Item Parameter System Values 60/P 30/P 30/PsF 60/I 50/P 25/P 25/PsF 50/I 24/P 24/PsF 5.1 Order of sample presentation in a scanned system Left to right, top to bottom For interlace and segmented frame systems, 1st active line of field 1 at top of picture 5.2 Tot
30、al number of lines 1 125 5.3 Field/frame/segment frequency (Hz) 60, 60/1.001 30, 30/1.001 60, 60/1.001 50 25 50 24, 24/1.001 48, 48/1.001 5.4 Interlace ratio 1:1 2:1 1:1 2:1 1:1 5.5 Picture rate (Hz) 60, 60/1.001 30, 30/1.001 50 25 24, 24/1.001 5.6 Samples per full line R, G, B, Y CB, CR 2 200 1 100
31、 2 640 1 320 2 750 1 375 5.7 Nominal analogue signal bandwidths(1) (MHz) 60 30 60 30 5.8 Sampling frequency R, G, B, Y (MHz) 148.5, 148.5/1.001 74.25, 74.25/1.001 148.5 74.25 74.25, 74.25/1.001 5.9 Sampling frequency(2) CB, CR (MHz) 74.25, 74.25/1.001 37.125, 37.125/1.001 74.25 37.125 37.125, 37.125
32、/1.001 (1) Bandwidth is for all components. (2) CB, CR sampling frequency is half of luminance sampling frequency. Rec. ITU-R BT.709-6 7 6 Analogue tri level sync signal The tri level sync signal may be used as a reference signal for synchronization of devices operating on this Recommendation. Item
33、Parameter System Values 60/P 30/P 30/PsF 60/I 50/P 25/P 25/PsF 50/I 24/P 24/PsF 6.1 Nominal level (mV) YBGR EEEE , Reference black: 0 Reference white: 700 (see Fig. 2B) 6.2 Nominal level (mV) RB CC EE , 350 (see Fig. 2B) 6.3 Form of synchronizing signal Tri-level bipolar (see Fig. 2A) 6.4 Line sync
34、timing reference OH (see Fig. 2A) 6.5 Sync level (mV) 300 2% 6.6 Sync signal timing Sync on all components (see Table 1, Figs 1 and 2) 6.7 Blanking interval (see Table 1, Figs 1 and 2) 8 Rec. ITU-R BT.709-6 TABLE 1 Level and line timing specification (See Figs 1 and 2) Symbol Parameter System Values
35、 60/P 30/P 30/PsF 60/I 50/P 25/P 25/PsF 50/I 24/P 24/PsF T Reference clock interval (s) 1/148.5, 1.001/148.5 1/74.25, 1.001/74.25 1/148.5 1/74.25 1/74.25, 1.001/74.25 a Negative line sync width(1) (T) 44 3 b End of active video(2) (T) 88 + 6 0 528 + 6 0 638 + 6 0 c Positive line sync width (T) 44 3
36、d Clamp period (T) 132 3 e Start of active video (T) 192 + 6 0 f Rise/fall time (T) 4 1.5 Active line interval (T) 1 920 + 0 12 Sm Amplitude of negative pulse (mV) 300 6 Sp Amplitude of positive pulse (mV) 300 6 V Amplitude of video signal (mV) 700 H Total line interval (T) 2 200 2 640 2 750 g Half
37、line interval (T) 1 100 1 320 1 375 h Vertical sync width (T) 1 980 3 880 3 1 980 3 880 3 1 980 3 880 3 k End of vertical sync pulse (T) 88 3 528 3 308 3 638 3 363 3 (1) “T ” denotes the duration of a reference clock or the reciprocal of the clock frequency. (2) A “line” starts at line sync timing r
38、eference OH (inclusive), and ends just before the subsequent OH (exclusive). Rec. ITU-R BT.709-6 9 FIGURE 1A Field/frame/segment synchronizing signal waveform OVBT.00709-1ANo.1121No.1125No.1No.2No.3No.4No.5No.6No.7No.42No.1123No.1124No.1125No.1No.2No.3No.4No.5No.6No.7No.21No.563No.560No.561No.562No.
39、564No.565No.566No.567No.568No.569No.584Firstfield/segmentFirstfield/segmentFirstfield/segmentsynctimingreferenceProgressiveProgressivefirstsegmentProgressivesecondsegmentInterlacefirstfieldInterlacesecondfield5H1/2H1/2H23H5H5H22H45H10 Rec. ITU-R BT.709-6 FIGURE 1B Detail of field/frame/segment synch
40、ronizing signal waveform BT.00709-1BInterlacefield1lineProgressivesegmentProgressive1lineffhdOHOHkacdkfffffffhdghOHOHkRec. ITU-R BT.709-6 11 FIGURE 2A Line synchronizing signal waveform B T . 020709- A(T h e w a v e fo rm e x h i b i t s s y mm e t ry w i t h re s p e c t t o p o i n t T )rf f fV/2S
41、mSm/2SpV/2ba cdeOH90%10%fSp/2Tr12 Rec. ITU-R BT.709-6 FIGURE 2B Sync level on component signals B T . 20 7 0 9 - 0 BBl an k i n g i n t erv al+ 7 0 0+ 3 0 00300+ 3 5 0+ 3 0 00300350OHmVEC B , E C RER, EG , EB , EYRec. ITU-R BT.709-6 13 Attachment 1 (Informative) Filter templates Figures in this Atta
42、chment are suggested filter templates intended to remove alias components. FIGURE A1-1 Guideline filter characteristics for R, G, B and Y signals (informative) B T . 1 - 0 10 7 0 9 - AInsertionloss(dB)a) T emp l at e fo r i n s ert i o n l o s sFreq u en cy (t i mes )fsInsertionloss(dB)0 . 1 d Bb )
43、Pas s b an d ri p p l e t o l era n cec) Pas s b an d g ro u p -d el ay0 . 0 5 0 .0 50 . 1 5 T 0 . 2 2 TFreq u en cy (t i mes )fsGroupdelay()T 0 .1 1 00 . 0 7 5 0 .0 7 50 . 2 7 0 . 4 00 . 4 00 . 4 0 0 . 5 0 0 . 6 0 0 . 7 3 1 . 0 0Freq u en cy (t i mes )fs0 . 1 1 05 0 d B4 0 d B1 2 d B504030201000000
44、0Note 1 s denotes luminance sampling frequency, the value of which is given in item 5.7. Note 2 Ripple and group delay are specified relative to the value at 100 kHz. 14 Rec. ITU-R BT.709-6 FIGURE A1-2 Guideline filter characteristics for CB and CR signals (informative) B T . A 1- 020709-Insertionlo
45、ss(dB)a) T emp l at e fo r i n s ert i o n l o s sFreq u en cy (t i mes )fsInsertionloss(dB)0 . 1 d Bb ) Pas s b an d ri p p l e t o l eran cec) Pas s b an d g ro u p -d el ay0 . 0 5 0 .0 50 . 1 5 T 0 . 2 2 TFreq u en cy (t i mes )fsGroupdelay()T 0 .1 1 00 . 0 7 5 0 .0 7 50 . 1 4 0 . 2 00 . 2 00 . 2
46、 0 0 . 2 5 0 . 3 0 0 . 3 7 0 . 5 0Freq u en cy (t i mes )fs0 . 1 1 05 0 d B4 0 d B6 d B5040302010000000Note 1 s denotes luminance sampling frequency, the value of which is given in item 5.8. Note 2 Ripple and group delay are specified relative to the value at 100 kHz. Rec. ITU-R BT.709-6 15 Attachme
47、nt 2 (Informative) Segmented frame (See Note 1) NOTE 1 The term segmented frame in the context of this Recommendation is intended to indicate that a picture has been captured in a progressive mode, and transported as two segments. One segment containing the odd lines of the progressive image, the se
48、cond segment containing the even lines of the progressive image. 1 Background The television systems in current use have typically used interlace capture (acquisition) and transmission. The frame/field rates of these systems have been 50/60 Hz, a rate that when presented on cathode ray tube (CRT) display devices did not require any associated picture flicker correction. Current Television systems support both interlace and progressive capture and display technology with wide deployment of flat panel displays capable of displaying imag
