ITU-R QUESTION 15-26-2007 Large screen digital imagery (LSDI)《大屏幕数字成像》.pdf

1、-1- QUESTION ITU-R 15-2/61Large screen digital imagery (LSDI)2(2002-2003-2007) The ITU Radiocommunications Assembly, considering a) that new very high resolution, LSDI are being introduced in some countries, whereby dramas, plays, sporting events, concerts, cultural events, etc., photographed electr

2、onically or on film, can be delivered, and exhibited in high resolution quality in theatres, halls, and other venues equipped with digital imaging capabilities; b) that such practice has the potential to produce excellent picture quality, equal or superior to that available heretofore, and opens the

3、 possibility for program delivery in various digital forms for exhibition to large audiences; c) that such practice is reported to also offer significant benefits in terms of a faster, lower cost production/postproduction and distribution, including to smaller, less-developed markets; d) that high r

4、esolution, bright, large screen projection equipment is available from several international manufacturers; e) that it may be beneficial to develop a uniform or compatible hierarchy of technical standards for program recording, mastering3, exchange, delivery and exhibition, harmonized with those est

5、ablished for the recording and mastering, exchange and delivery of programs for other applications, since this can ease international program exchange; f) that the ITU-R has been studying extremely high resolution imagery under Question ITU-R 40/6 based on the concept of a tiered or hierarchical app

6、roach; g) that the introduction of digital technologies results in the converging of broadcast and telecommunication data channels, so that the secondary distribution of digital programs now also foresees the possible distribution of digital packetized data, in real-time and non-real-time, program-r

7、elated and non-program-related, to the general public as well as to individual recipients or groups of recipients; _ 1This Question should be brought to the attention of Working Parties 6B, 6E, 6M, 6Q and 6S. 2Large Screen Digital Imagery is a family of digital imagery systems applicable to programs

8、 such as dramas, plays, sporting events, concerts, cultural events, etc., from capture to large screen presentation in high resolution quality in appropriately equipped theatres, halls, and other venues. 3The term “mastering” indicates the set of those technical activities that lead to the finished

9、edited master of a program, which normally materializes the creative intent of its authors (see for instance Rec. ITU-R BR.1292). - 2 - h) that the definition of broadcasting included in the ITU Constitution (CS/A.1010)4from the regulatory point of view, makes no distinction between real-time and no

10、n-real-time service delivery, nor between interactive and non-interactive programming, nor among sound, television or other types of content, nor among analog, digital or digital packetized delivery; j) that various aspects of LSDI are within the scope of Study Group 6 as defined in Resolution ITU-R

11、 4-45, e.g.: acquisition, production, postproduction and mastering; storage and transfer to and from film for international exchange; encoding, encryption and assembling with control and metadata; delivery by terrestrial or satellite means; quality assessments of the proposed technical solutions; k)

12、 that some other aspects of LSDI are in the scope of ITU-T Study Group 9; the IEC and ISO; other international or regional standardizing bodies as well as other relevant fora; l) that, in view of its scope, Study Group 6 is well placed to act as a focal point to coordinate relevant studies among the

13、 various concerned ITU and non-ITU bodies; m) that studies on LSDI are important both for the theatre and for broadcasting, and the opening of some LSDI operational services makes it urgent for the ITU-R to initiate those studies; n) that although studies are currently being carried out in various c

14、ountries on all aspects of LSDI, those specifically related to motion pictures6are not yet fully completed, decides that the following Question should be studied 1 What are the picture and sound performance goals, in subjective and objective terms, of the LSDI applications that require the use of th

15、e higher members of the expanded LSDI hierarchy of image systems? 2 What methods are appropriate for the subjective and objective assessment of the sound and image quality of LSDI systems including those intended for applications that require the use of the higher members of the expanded LSDI hierar

16、chy of image systems? _ 4The definition of broadcasting given in the ITU Constitution (CS/A.1010) is broadcasting service: A radiocommunication service in which the transmissions are intended for direct reception by the general public. This service may include sound transmissions, television transmi

17、ssions or other types of transmission. This definition appears also as 1.38 in Art. 1 of the ITU Radio Regulations, and the scope of ITU-R Study Group 6 in Resolution ITU-R 4-4 provides details on it. 5Resolution ITU-R 4-4 Structure of Radiocommunication Study Groups. 6The term “motion pictures” (al

18、so called movies, features, etc.), is used to indicate content that is intended for first release in a cinema theatre setting. - 3 - 3 Which digital formats, standards and operating practices for program production, storage and international exchange should be recommended in order to reliably meet t

19、he performance goals of LSDI applications, including those intended for applications that require the use of the higher members of the expanded LSDI hierarchy of image systems? 4 Which information related to LSDI programs should be included as metadata through the mastering and carried through the d

20、igital distribution chain, and in which form? 5 Which methods can be recommended for the bit-rate-reduction encoding and for the encryption of LSDI programs? 6 Which methods can be recommended for conditional access and copy protection of LSDI programs? 7 Which methods can be recommended to adapt LS

21、DI programs for delivery by terrestrial emission? 8 Which methods can be recommended to adapt LSDI programs for delivery by satellite emission? 9 Which methods can be recommended for archiving of LSDI material? further decides 1 that co-operation between ITU-T Study Group 9 and ITU-R Study Group 6 i

22、s desirable in the selection of methods for the delivery of LSDI programs to their end users by television cable, fiber networks and telecommunications networks; 2 that co-operation with the ISO/IEC JTC1/SC29/WG11 (MPEG) is desirable in the selection of compression tools for the delivery of LSDI pro

23、grams to their end users; 3 that co-operation with ISO, IEC and the other international and regional standardizing bodies and fora (see examples in Annex 1) is desirable in the study of the LSDIs presentation environment objectives and the related methods and devices; 4 that co-operation with other

24、bodies such as those given as examples in Annex 1 is desirable in the selection of methods compatible with the end-to-end LSDI specifications currently being developed; 5 that the bodies selected for liaison should be chosen on a case-by-case basis depending on their relevance to the particular topi

25、c; 6 that SG 6 studies of the methods for the production, delivery and presentation of LSDI programs should rely, where appropriate, on the use of existing tools and toolkits; 7 that the LSDI studies should result in a set of Recommendations based on a hierarchy of levels of system performance that

26、harmonize where possible with existing systems for digital imagery; - 4 - 8 That while studies of LSDI may include characteristics7that are common to motion pictures8and in the purview of Study Group 6, Study Group 6 recognizes that aspects9specifically relating to motion pictures should be based on

27、 standards developed by the motion picture expert groups; 9 that the LSDI studies should be completed by the year 2010. Category: S2 Annex 1 Some bodies within and outside the ITU that could provide cooperation on LSDI studies The list below provides an indication of some entities within and outside

28、 the ITU that possess an expertise relevant to LSDI and could co-operate to LSDI studies within ITU-R Study Group 6. ITU bodies ITU-T Study Group 9 ITU-T Study Group 16 Some other international or regional standardizing bodies and fora ARIB Association of Radio Industries and Businesses ATSC Advance

29、d Television Systems Committee DVB Digital Video Broadcasting EDCF European Digital Cinema Forum IEC International Electrotechnical Commission ISO International Standards Organisation ISO/IEC JTC1/SC29/WG11 (MPEG) Moving Picture Experts Group SMPTE Society of Motion Picture and Television Engineers

30、_ 7Such as frame rates, colorimetry, resolution, and aspect ratios. 8The term “motion pictures” (also called movies, features, etc.), is used to indicate content that, which is intended for first release in a cinema theatre setting. 9Such as production, post-production, distribution, exhibition, tra

31、ilers, etc. - 5 - International or regional Unions and Associations of broadcasters WBU-TC Technical Committee of the World Broadcasting Unions Regional Unions and Associations of Broadcasters (ABU, ASBU, CBU, EBU, IAB, NABA, OTI, URTNA) Other bodies Associations of manufacturers Associations of program distributors Associations of theatre owners and operators (e.g., U. S. National Association of Theatre Owners (NATO), International Union of Cinemas (UNIC) and Motion Picture Theatre Owners Association of Canada (MPTAC), etc.).