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Recommendation ITU-R BT.709-5 (04/2002) Parameter values for the HDTV standards for production and international programme exchange BT Series Broadcasting service (television)

ii Rec. ITU-R BT.709-5 Foreword The role of the Radiocommunication Sector is to ensure 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 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 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 patent information database can also be found. Series of ITU-R Recommendations (Also available online at http://www.itu.int/publ/R-REC/en) Title Satellite delivery Recording for production, archival and play-out; film for television Broadcasting service (sound) Broadcasting service (television) Fixed service Mobile, radiodetermination, amateur and related satellite services Radiowave propagation Radio astronomy Remote sensing systems Fixed-satellite service Space applications and meteorology Frequency sharing and coordination between fixed-satellite and fixed service systems Spectrum management Satellite news gathering Time signals and frequency standards emissions Vocabulary and related subjects Series BO BR BS BT F M P RA RS S SA SF SM SNG TF V Note: This ITU-R Recommendation was approved in English under the procedure detailed in Resolution ITU-R 1. © ITU 2009 Electronic Publication Geneva, 2009 All rights reserved. No part of this publication may be reproduced, by any means whatsoever, without written permission of ITU.

Rec. ITU-R BT.709-5 1 RECOMMENDATION ITU-R BT.709-5* Parameter values for the HDTV** standards for production and international programme exchange (Question ITU-R 27/11) Scope This Recommendation defines the image format parameters and values for HDTV. Part 1 of this Recommendation is not in current use and is included to capture historic evolution of the Recommendation. Part 2 of the Recommendation is widely deployed; implementers of broadcasting technologies should apply the values contained in Part 2. (1990-1994-1995-1998-2000-2002) The ITU Radiocommunication Assembly, considering that for many years HDTV programmes have been produced in several countries; a) that parameter values for HDTV production standards should have maximum commonality; b) that two HDTV scanning standards, 1125/60/2:1 and 1250/50/2:1, were previously c) developed for that purpose, having a significant number of parameters which have been agreed on a worldwide basis, and for which some equipment remains in use; that a HDTV common image format of 1 920 pixels by 1080 lines providing square pixel d) sampling and a number of interlace and progressive picture rates has been designed for digital television, computer imagery and other applications (in this Recommendation, the term pixel is used to describe a picture element in the digital domain); that the parameters defined for all these systems meet the quality goals set for HDTV; e) f) that film productions are an important programme source for HDTV broadcasting and, conversely, the use of HDTV production systems has significant benefits for film programme production; g) conversion to 525/625 television systems, has been successfully implemented; h) that high-quality conversion between the various HDTV systems, as well as down- that programmes produced and archived will not become obsolete using these standards, recommends that for HDTV programme production and international exchange, one of the systems 1 described in Part 2 of this Recommendation, should be used. * Radiocommunication Study Group 6 made editorial amendments to this Recommendation in 2009 in accordance with Resolution ITU-R 1. ** “A high-definition system is a system designed to allow viewing at about three 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 Rec. ITU-R BT.709-5 Signal parameter values for the 1125/60/2:1 system and the 1250/50/2:1 system Part 1 HDTV systems related to conventional television1 (The areas in bold characters in the Tables below denote parameter values which have been agreed to on a worldwide basis.) Opto-electronic conversion 1 Item 1.1 1.2 1.3 1.4 2 Item 2.1 2.2 2.3 2.4 Parameter Opto-electronic transfer characteristics before non-linear precorrection Overall opto-electronic transfer characteristics at source Chromaticity coordinates (CIE, 1931) Primary – Red (R) – Green (G) – Blue (B) Assumed chromaticity for equal primary signals (Reference white) ER = EG = EB Picture characteristics Value 1125/60/2:1 1250/50/2:1 Assumed linear for 1 ≥ L ≥ 0.018 for 0.018 > L ≥ 0 V = 1.099 L0.45 – 0.099 V = 4.500 L where: L: V: corresponding electrical signal luminance of the image 0 ≤ L ≤ 1 x 0.640 0.300 0.150 x 0.3127 y 0.330 0.600 0.060 y 0.3290 D65 Parameter 1125/60/2:1 Aspect ratio Sample per active line Sampling lattice Active lines per picture 1250/50/2:1 Value 16:9 1920 Orthogonal 1035 1152 1 This Part 1 specifies parameter values used in the early days of analogue high definition television implementation. It is provided here in recognition of the fact that it is no longer in use today, but vintage HDTV programs of historical values still exist in the form of analogue video tape recordings, that may occasionally need to be played back on appropriate equipment.

Rec. ITU-R BT.709-5 3 Picture scanning characteristics Item Parameter 3.1 Order of sample scanning 3.2 3.3 3.4 3.5 3.6 Interlace ratio Picture rate (Hz) Total number of lines Field frequency (Hz) Line frequency (Hz) Value 1125/60/2:1 1250/50/2:1 Left to right, top to bottom 1st line of field 1 above 1st line of field 2 2:1 30 1125 60 25 1250 50 33 750 ± 0.001% 31 250 ± 0.0001% 3 4 Signal format The terms R, G, B, Y, CB, CR, are often used and are generally understood to refer to the signals ,GE′ respectively (i.e. they correspond to gamma pre-corrected signals). ,BE′ ,YE′ ,BCE′ RCE′ ,RE′ Item Parameter 4.1 Conceptual non-linear precorrection of primary signals 4.2 Derivation of luminance signal )1( YE′ 4.3 Derivation of colour-difference signal (analogue coding)(1) Value 1125/60/2:1 1250/50/2:1 γ = 0.45 (see item 1.2) YE′ = 0.2126 RE′ + 0.7152 GE′ + 0.0722 BE′ BE′ RE′ BCE′ = 0.5389 RCE′ = 0.6350 ( ( – – YE′ = 0.299 RE′ + 0.587 GE′ + 0.114 BE′ BE′ ( RE′ BCE′ = 0.564 RCE′ = 0.713 ( – – )YE′ )YE′ )YE′ )YE′ 4.4 Derivation of colour-difference signal (digital coding) CB, CR Digitally scaled from the values of item 4.3 (1) The coefficients for the equations have been calculated following the rules laid down in SMPTE RP177-1993.

4 Rec. ITU-R BT.709-5 Analogue representation 5 Levels are specified in millivolts (mV) measured across a matched 75 Ω termination. Parameter Value 1125/60/2:1 1250/50/2:1 Item 5.1 5.2 Nominal level (mV) ′ EEEE Y ′ G ′ R ′ B , , , Nominal level (mV) ′ ′ C E E C , B R 5.3 Form of synchronizing signal 5.4 Line sync timing reference Sync level (mV) Sync signal timing 5.5 5.6 5.7 5.8 5.9 Reference black: 0 Reference white: 700 (see Fig. 1) ± 350 (see Fig. 1) Tri-level bipolar (see Fig. 2) OH (see Fig. 2) ± 300 ± 2% (See Table 1 and Fig. 3) Sync on all components (See Fig. 4) – rise time 50 ± 10 ns (between 10-90%) – see also footnote (1) Inter-component timing accuracy Not applicable ± 2 ns Blanking interval (See Table 1 and Fig. 5) (See Tables 2 and 3) Nominal signal bandwidth (MHz) 30 (for all components) (1) When using R, G, B signals, the use of syncs on at least the green channel is advised; transmission of separate syncs is also acceptable. When using Y, CB, CR signals the Y signal at least carries sync.

mV +700 +300 0 –300 +350 +300 0 –300 –350 Rec. ITU-R BT.709-5 FIGURE 1 Sync level on component signals ER′ , EG′ , EB′ , EY′ 5 ′ , E ′CR ECB Blanking interval OH FIGURE 2 Form of synchronizing signal 0709-01 OH Tr Line sync timing reference (The waveform exhibits symmetry with respect to point Tr) 0709-02

Rec. ITU-R BT.709-5 Line synchronizing signal waveform for the 1125/60/2:1 system FIGURE 3 f f f 2 / V p S 2 / p S 2 / V m S 2 / m S a c b d OH Line sync timing references e 90% 10% t1 t2 f 0709-03 6

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