1、 Recommendation ITU-R BS.2019(08/2012)Audio system for the production and international exchange of 3DTV programmes for broadcastingBS SeriesBroadcasting service (sound)ii Rec. ITU-R BS.2019 Foreword The role of the Radiocommunication Sector is to ensure the rational, equitable, efficient and econom
2、ical 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 W
3、orld 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
4、 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. Seri
5、es 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, radiodeterm
6、ination, 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 SNG Sate
7、llite 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, 2012 ITU 2012 All rights reserved. No part of this publi
8、cation may be reproduced, by any means whatsoever, without written permission of ITU. Rec. ITU-R BS.2019 1 RECOMMENDATION ITU-R BS.2019 Audio system for the production and international exchange of 3DTV programmes for broadcasting (2012) Scope This Recommendation specifies the audio system that shou
9、ld be used worldwide for the production1and international exchange of the audio component of 3DTV2programmes for broadcasting; this Recommendation does not apply to the audio for UHDTV 3DTV systems. The ITU Radiocommunication Assembly, considering a) that programme producers and broadcasters are pro
10、ducing 3DTV programmes for domestic broadcasting and for international programme exchange; b) that there is a need for a set of ITU-R specifications to be used worldwide in the production of 3DTV programmes, in order to facilitate their international exchange; c) that 3DTV broadcasters, programme pr
11、oducers and distributors need to preserve the value and quality of their programmes for television broadcast use and therefore have an interest in protecting their programmes from technical obsolescence; d) that consequently the audio system to be used worldwide, now and in the foreseeable future, f
12、or the production and international exchange of the audio component of 3DTV programmes for broadcasting should provide the highest audio quality that current systems already widely implemented in the world can achieve; e) that Recommendation ITU-R BS.775 Multichannel stereophonic sound system with a
13、nd without accompanying picture, specifies a universal stereophonic audio system (the 5.1 system), which provides high audio quality, high flexibility and a realistic surround sound effect and is currently in widespread use for the production and international exchange of television programmes; this
14、 system has three front channels and two rear/side channels together with an optional low frequency effects (LFE) channel, and this system provides the highest audio quality of current broadcast systems; f) that Recommendation ITU-R BS.775 also specifies ways to downmix or upmix audio signals in tho
15、se cases when presentation of a smaller or a larger number of audio channels is required, recommends 1 that audio produced for 3DTV programmes should preferably use the 5.1 audio system specified in Recommendation ITU-R BS.775 for the production and international exchange of 3DTV programmes; 1This R
16、ecommendation uses the term “production” in the sense that it includes the adaptation of the content for the final playout (tailoring). Acquisition (recording) and pre-mastering are not restricted from using a larger number of channels. 2In the context of this Recommendation the term 3DTV is used to
17、 convey a stereoscopic image or image pair. 2 Rec. ITU-R BS.2019 2 that, when there is sufficient bandwidth available, the audio channels of the 5.1 channel audio produced for 3DTV programmes should be exchanged as uncompressed, independent full-quality channels, and that when bandwidth constraints
18、necessitate exchange in a bit rate reduced representation, any audio coding system used should meet the requirements of Recommendation ITU-R BS.1548; 3 that when the optional LFE channel of the 5.1 audio system is used for the production and international exchange of 3DTV programmes, usage of that c
19、hannel should comply with the practices specified in Recommendation ITU-R BS.775; 4 that the choices made for the various audio parameters among those specified in Recommendation ITU-R BS.775 (e.g. number of the sound channels, etc.) should be reported in the metadata that accompanies the programme. _
