1、 International Telecommunication Union ITU-T J.601TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU (11/2005) SERIES J: CABLE NETWORKS AND TRANSMISSION OF TELEVISION, SOUND PROGRAMME AND OTHER MULTIMEDIA SIGNALS Transport of Large Screen Digital Imagery Transport of Large Screen Digital Imagery (LSDI)
2、 applications for its expanded hierarchy ITU-T Recommendation J.601 ITU-T Rec. J.601 (11/2005) i ITU-T Recommendation J.601 Transport of Large Screen Digital Imagery (LSDI) applications for its expanded hierarchy Summary This Recommendation defines technologies regarding transport of LSDI applicatio
3、ns for its expanded hierarchy. It supports the 3840 2160 and 7680 4320 formats in the expanded hierarchy of LSDI image formats. For transport of these LSDI signals, the following items are defined in this Recommendation: Compression coding schemes; Multiplexing and framing methods; Transmission prot
4、ocols over non-IP networks; Transmission protocols over IP networks. Source ITU-T Recommendation J.601 was approved on 29 November 2005 by ITU-T Study Group 9 (2005-2008) under the ITU-T Recommendation A.8 procedure. ii ITU-T Rec. J.601 (11/2005) FOREWORD The International Telecommunication Union (I
5、TU) is the United Nations specialized agency in the field of telecommunications. The ITU Telecommunication Standardization Sector (ITU-T) is a permanent organ of ITU. ITU-T is responsible for studying technical, operating and tariff questions and issuing Recommendations on them with a view to standa
6、rdizing telecommunications on a worldwide basis. The World Telecommunication Standardization Assembly (WTSA), which meets every four years, establishes the topics for study by the ITU-T study groups which, in turn, produce Recommendations on these topics. The approval of ITU-T Recommendations is cov
7、ered by the procedure laid down in WTSA Resolution 1. In some areas of information technology which fall within ITU-Ts purview, the necessary standards are prepared on a collaborative basis with ISO and IEC. NOTE In this Recommendation, the expression “Administration“ is used for conciseness to indi
8、cate both a telecommunication administration and a recognized operating agency. Compliance with this Recommendation is voluntary. However, the Recommendation may contain certain mandatory provisions (to ensure e.g. interoperability or applicability) and compliance with the Recommendation is achieved
9、 when all of these mandatory provisions are met. The words “shall“ or some other obligatory language such as “must“ and the negative equivalents are used to express requirements. The use of such words does not suggest that compliance with the Recommendation is required of any party. INTELLECTUAL PRO
10、PERTY RIGHTS ITU draws attention to the possibility that the practice or implementation of this Recommendation may involve the use of a claimed Intellectual Property Right. ITU takes no position concerning the evidence, validity or applicability of claimed Intellectual Property Rights, whether asser
11、ted by ITU members or others outside of the Recommendation development process. As of the date of approval of this Recommendation, ITU had not received notice of intellectual property, protected by patents, which may be required to implement this Recommendation. However, implementors are cautioned t
12、hat this may not represent the latest information and are therefore strongly urged to consult the TSB patent database. ITU 2006 All rights reserved. No part of this publication may be reproduced, by any means whatsoever, without the prior written permission of ITU. ITU-T Rec. J.601 (11/2005) iii CON
13、TENTS Page 1 Scope 1 2 References. 1 2.1 Normative references 1 2.2 Informative references 2 3 Terms and definitions . 2 4 Abbreviation . 2 5 Target application and system parameters 2 6 Compression coding scheme 3 7 Multiplexing or framing of compressed bit-streams for LSDI. 4 8 Transport over non-
14、IP networks . 4 9 Transport using Internet Protocols 4 9.1 Transport over UDP/IP. 4 9.2 Transport over TCP/IP . 5 Appendix I An example of a film-based system that gives viewers visual experiences of a high-sensation of reality 5 Appendix II Viewing angles for the hierarchy of LSDI systems 6 Appendi
15、x III A study of the psychological effects of wide-screen video systems for LSDI applications . 6 III.1 Introduction 6 III.2 Subjective evaluation experiments. 6 III.3 Results 7 III.4 Conclusion 8 Appendix IV The expanded hierarchy of the LSDI image formats 9 BIBLIOGRAPHY 11 ITU-T Rec. J.601 (11/200
16、5) 1 ITU-T Recommendation J.601 Transport of Large Screen Digital Imagery (LSDI) applications for its expanded hierarchy 1 Scope This Recommendation defines technologies regarding transport of LSDI applications for its expanded hierarchy. It supports the 3840 2160 and 7680 4320 formats in the expand
17、ed hierarchy of LSDI image formats. For transport of these LSDI signals, the following items are defined in this Recommendation: Compression coding schemes; Multiplexing and framing methods; Transmission protocols over non-IP networks; Transmission protocols over IP networks. 2 References 2.1 Normat
18、ive references The following ITU-T Recommendations and other references contain provisions which, through reference in this text, constitute provisions of this Recommendation. At the time of publication, the editions indicated were valid. All Recommendations and other references are subject to revis
19、ion; users of this Recommendation are therefore encouraged to investigate the possibility of applying the most recent edition of the Recommendations and other references listed below. A list of the currently valid ITU-T Recommendations is regularly published. The reference to a document within this
20、Recommendation does not give it, as a stand-alone document, the status of a Recommendation. 1 ITU-T Recommendation H.264 (2005), Advanced video coding for generic audiovisual services. ISO/IEC 14496-10:2005, Information technology Coding of audio-visual objects Part 10: Advanced Video Coding. 2 ITU-
21、T Recommendation H.222.0 (2000) | ISO/IEC 13818-1:2000, Information technology Generic coding of moving pictures and associated audio information: Systems. 3 ITU-T Recommendation J.120 (2000), Distribution of sound and television programs over the IP network. 4 ITU-T Recommendation J.127 (2004), Tra
22、nsmission protocol for multimedia webcasting over TCP/IP networks. 5 ISO/IEC 14496-15:2004, Information technology Coding of audio-visual objects Part 15: Advanced Video Coding (AVC) file format. 6 ISO/IEC 15444-1:2004, Information technology JPEG 2000 image coding system: Core coding system. 7 ISO/
23、IEC 15444-3:2002, Information technology JPEG 2000 image coding system Part 3: Motion JPEG 2000. 2 ITU-T Rec. J.601 (11/2005) 8 ISO/IEC 15444-3:2002/Amd.2:2003, Motion JPEG 2000 derived from ISO base media file format. 9 IETF RFC 3550 (2003), RTP: A Transport Protocol for Real-Time Applications. 10
24、IETF RFC 2250 (1998), RTP Payload Format for MPEG1/MPEG2 Video. 11 ITU-T Recommendation H.262 (2000) | ISO/IEC 13818-2:2000, Information technology Generic coding of moving pictures and associated audio information: Video. 12 ISO/IEC 14496-14:2003, Information technology Coding of audio-visual objec
25、ts Part 14: MP4 file format. 13 ITU-R Recommendation BT.1361 (1998), Worldwide unified colorimetry and related characteristics of future television and imaging systems. 2.2 Informative references ITU-T Recommendation J.600 (2004), Transport of Large Screen Digital Imagery (LSDI) applications that em
26、ploy MPEG-2 encoded HDTV signals. 3 Terms and definitions No new terms are defined in this Recommendation. 4 Abbreviation This Recommendation uses the following abbreviation: LSDI Large Screen Digital Imagery 5 Target application and system parameters The target application and system parameters ass
27、umed for this Recommendation are described in Appendices I and II. The psychological impact of wide-screen viewing of programs in these image formats are reported in Appendix III. Examples of the bit rates required to deliver those programs for contribution and for distribution purposes are provided
28、 in Appendix IV, based on the use of a toolset of compression algorithms scaled up from the ones currently specified in ITU-T Recs H.264 and H.262. ITU-T Rec. J.601 (11/2005) 3 6 Compression coding scheme Table 1 specifies compression coding schemes applicable to LSDI systems of the extended hierarc
29、hy. Table 1/J.601 Compression coding schemes Method Resolution Chroma format Maximumbit rate (Mbit/s) Maximum frame rate (fps) Lossless coding supportBits per componentPred. Type Hierarchical coding Num. of aux. plane A 3840 2160 4:2:2 240 30 (Note 1) No 10 I,P,B No 0 B 3840 2160 4:2:2 4:4:4 240 30
30、(Note 1) Yes 10, 12 I,P,B No 0 C 7680 4320 4:2:2 240 7.5 (Note 1) No 10 I,P,B No 0 D 7680 4320 4:2:2 4:4:4 240 7.5 (Note 1) Yes 10, 12 I,P,B No 0 E 3840 2160 7680 4320 4:2:2 4:4:4 Unlimited Unlimited Yes 38 I Yes 16381 F 3840 x 2160 7680 x 4320 4:2:2 300 30 (Note 1) No 8 I,P,B No 0 NOTE 1 ITU-T Recs
31、 H.264 and H.262 should define new, higher levels, that will support 7680 4320 with 60 frames/second frame rate. NOTE 2 Since ITU-T Recs H.264 and H.262 do not currently support signals in the 3840 2160 or 7680 4320 image formats, transmission of those formats can currently be implemented by dividin
32、g the image in 16 9 sub-rasters, each one of them in the 1920 1080 format, and each one separately encoded. Methods A to F are the ones identified below: Method Description A ITU-T Rec. H.264 High 4:2:2 profile level 5.1 B ITU-T Rec. H.264 High 4:4:4 profile level 5.1 C ITU-T Rec. H.264 High 4:2:2 p
33、rofile level 5.1 D ITU-T Rec. H.264 High 4:4:4 profile level 5.1 E ISO/IEC JPEG2000 F H.262 4:2:2 profile high level 4 ITU-T Rec. J.601 (11/2005) 7 Multiplexing or framing of compressed bit-streams for LSDI Table 2 defines multiplexing or framing methods of compressed bit-streams applicable to the L
34、SDI systems of the extended hierarchy considered in this Recommendation. Table 2/J.601 Multiplexing or framing methods Method Upper layer Lower layer Note H.222.0 (TS Packet) 2 H.262 11 H.264 1 M-JPEG2000 6 7 Independent RTP 9 H.222.0 UDP/IP TCP/IP Payload format is defined in 10 ISO File format 5 H
35、.264 J.127 4 HTTP/TCP/IP FTP/TCP/IP etc. ISO File format 7 8 M-JPEG2000 J.127 4 HTTP/TCP/IP FTP/TCP/IP etc. ISO file format 12 H.262 J.127 4 HTTP/TCP/IP FTP/TCP/IP etc. 8 Transport over non-IP networks ITU-T Rec. H.222.0 (MPEG-2 TS) should be used as a multiplexing method for transport over non-IP n
36、etworks. Any lower layer protocol other than IP and/or any lower medium can be used for this transport mode. 9 Transport using Internet Protocols 9.1 Transport over UDP/IP ITU-T Rec. H.222.0 (MPEG-2 TS) should be used as a multiplexing method also for transport over IP networks. ITU-T Rec. J.120 sho
37、uld be used for LSDI transport over UDP/IP networks. ITU-T Rec. J.120 uses SDP as presentation description, RTSP as session control, and RTP as media packet format. Transmission of SDP is outside the scope of this Recommendation, TCP/IP should be used for RTSP session control and UDP/IP should be us
38、ed for RTP packet transmission. RTP is defined in 9 and its framing format is defined in 10 (See Section 2). Only H.222.0 (MPEG-2 Transport Stream) is defined as an upper layer of the RTP packet in this Recommendation. Therefore, payload type 33 (MP2T) should be used. ITU-T Rec. J.601 (11/2005) 5 9.
39、2 Transport over TCP/IP In this Recommendation, ISO file formats for H.264, for H.262 and for Motion JPEG2000 should be used as a multiplexing format for LSDI transport over TCP/IP. This Recommendation defines two transport modes over TCP/IP. For the progressive download mode, ITU-T Rec. J.127 shoul
40、d be used for LSDI over TCP/IP networks. ITU-T Rec. J.127 uses XHTML description for presentation description, HTTP for session control and does not specify multiplexing format for the media. For the file downloading mode, any other file transmission protocols such as FTP or HTTP may be used; this d
41、epends on availability and is outside the scope of this Recommendation. Appendix I An example of a film-based system that gives viewers visual experiences of a high-sensation of reality This appendix provides a graphical representation of the area of application of this Recommendation (see Figure I.
42、1), based on the horizontal viewing angle subtended by the presentation screen at the position of the viewers. The application is designed on the basis of viewing angles that are typical of IMAX and OMNIMAX theatres. Figure I.1/J.601 Horizontal viewing angle of the IMAX system 6 ITU-T Rec. J.601 (11
43、/2005) Appendix II Viewing angles for the hierarchy of LSDI systems This appendix indicates the horizontal viewing angles and the viewing distances (relative to picture heights) for which the higher formats were designed, which are covered in this Recommendation for the extended hierarchy of the LSD
44、I family of systems (see Table II.1). Table II.1/J.601 Horizontal viewing angle for the hierarchy of LSDI systems LSDI system 1920 1080 3840 2160 7680 4320 Viewing distance (relative to picture height) 3 1.5 0.75 Viewing angle (degrees) 31 58 96 These values are calculated based on the shortest dist
45、ance at which scanning lines cannot be perceived by people with visual acuity of 1.0. Appendix III A study of the psychological effects of wide-screen video systems for LSDI applications III.1 Introduction This appendix describes the psychological evaluation results of “sensation of reality“ of LSDI
46、 covering from HDTV format to expanded format. The results would contribute towards determining system parameter values such as display size, viewing distance and spatial resolution. III.2 Subjective evaluation experiments A single stimulus method with a seven-grade categorical scale (1 = no presenc
47、e at all; 7 = very strong presence) was used for evaluating the “sensation of reality“ of images projected on a screen. The size of images was varied by changing the number of scanning lines from 1000 to 4000. The viewing distance was determined to be the point at which viewers with normal vision co
48、uld no longer discern the scanning line structure. This corresponds to three times the picture height when the image size is 1920 1080. The viewing angle varies between 33 and 100 degrees according to the image size. Table III.1 lists the experimental conditions. Forty-one non-expert subjects evalua
49、ted five still landscape pictures listed in Table III.2. They were photographed from different camera angles of 60 and 100 degrees to see the effect of spatial distortion resulting from the mismatch between the screen-viewing angle and camera angle, which can result in a reduced “sensation of reality“. ITU-T Rec. J.601 (11/2005) 7 Table III.1/J.601 Experimental conditions Scanning lines 1000 1143 1333 1600 2000 2667 3200 3556 4000 Pict
