ITU-R REPORT BT 2003-1994 THE HARMONIZATION OF HDTV STANDARDS BETWEEN BROADCAST AND NON-BROADCAST APPLICATIONS (54 pp)《高清晰度电视标准在广播和非广播应用软件程序 n间的平衡》.pdf
《ITU-R REPORT BT 2003-1994 THE HARMONIZATION OF HDTV STANDARDS BETWEEN BROADCAST AND NON-BROADCAST APPLICATIONS (54 pp)《高清晰度电视标准在广播和非广播应用软件程序 n间的平衡》.pdf》由会员分享,可在线阅读,更多相关《ITU-R REPORT BT 2003-1994 THE HARMONIZATION OF HDTV STANDARDS BETWEEN BROADCAST AND NON-BROADCAST APPLICATIONS (54 pp)《高清晰度电视标准在广播和非广播应用软件程序 n间的平衡》.pdf(54页珍藏版)》请在麦多课文档分享上搜索。
1、-1- Rep. ITU-R BT.2003 REPORT ITU-R BT.2003 THE HARMONIZATION OF HDTV STANDARDS BETWEEN BROADCAST AND NON-BROADCAST APPLICATIONS (1 994) SECTION 1 1. Introduction This Report concerns the studies of the ITU-R, pursuant to Decision ITU-R 91, with regard to the harmonization of standards for HDTV in b
2、roadcasting and production and the standards for non-broadcast uses of HDTV*. In particular, these studies focus on: application in non-broadcast uses and the possible impacts that broadcast forms of HDTV might have on the standards and practices to be developed for non-broadcast uses in the ISO, th
3、e IEC, and the ITU-T; the constraints that might exist for the development of standards for broadcast HDTV due to non-broadcast uses. This activity will be useful input to Task Group 11/1, Working Parties 1 lD, 10-1 lR, 10-1 lS, and possibly to other groups of the ITU-R; the areas where commonality
4、between the standards for broadcast and non-broadcast uses of HDTV might be beneficial and the possible impacts of this commonality; possible areas where important differences between the standards for broadcast and non- broadcast uses may exist and possible ways to minimize their impacts. In the st
5、udies of harmonization, a number of important concerns have been identified; Selection of the parameter values for television systems may fall into two classes: (a) image-related parameters of the optical/electronic interface in the camera or the electronic/optical interface in the display. Recommen
6、dation ITU-R BT.709 is an example of this class of specification; transmission-related parameters of the encoded, filtered, redundancy-reduced description of the image, from which it may be reconstructed, albeit, less than perfectly. Harmonization activities may be different in the two areas as the
7、first relies more on fundamental, immutable concepts, while the second is constrained by service objectives and contemporary technology; (b) harmonization activities should recognize that many aspects of the work relate to basic facts, which cannot be harmonized. What is then required is an architec
8、tural structure for television images that is harmonious in respect of spatial, colorimetric and temporal characteristics, into which specific systems can be nested; * Further details of the development of standards for broadcast HDTV may be found in Recommendations lTU-R BT.709, lTU-R BT.710, ITU-R
9、 BR.713, ITU-R BR.714 and lTU-R BR.716, and Reports ITU-R BT.801,lTU-R B0.1075, lTU-R BT.1217,lTU-R CMTT.1239 and in the activities of ITU-R Task Group 11/1 and Working Parties 11/A and 11B. -2- Rep. ITU-R BT.2003 other aspects of a television system may be optimized for specific applications, indus
10、tries or contemporary technologies and their harmonization may not be helpful. Conversely, harmonization of the characteristics of the delivery mechanisms (e.g., terrestrial, satellite, cable, fibre, disc, tape) to the consumers television receiver would be beneficial; some aspects of a television s
11、ystem may not be interesting from a harmonization viewpoint, not having consequences beyond specific applications or industries; a major concern of harmonization must be the transfer of images between systems and applications. In the interchange, lack of harmonization or lack of definitions can resu
12、lt in unsatisfactory results; harmonization of standards for television and imagery may lead to economic advantages derived from commonality of equipment or components, economies of scale or other factors. The equitable distribution of these advantages may be an important factor in the acceptance of
13、 the standards; the development of standards for television and imagery may be rendered more efficient and rapid with appropriate degrees of harmonization, through the coordination of activities and the reduction of redundant effort. It is to be noted that, although the main focus of the harmonizati
14、on activity concerns television and image systems at high resolutions (HDTV/HRI), increasingly, the harmonization activity impacts television and image systems at lower levels of resolution and quality. This is particularly the case for those systems based on digital technology. SECTION 2 2. The ran
15、ge of HDTV and high-resolution imagery uses, the organizations responsible for standards and their development HDTV and high-resolution imagery (HRI) techniques have been developed to improve the quality of todays television broadcasting (production and emission), but applications of HDTV now exist
16、in many other non-broadcast areas. The following have been indicated in contributions (see Bibliography). -3- Rep. ITU-R BT.2003 I TABLE 1 SECTOR APPLICATION Education Teaching and training Advertising identify common goals, areas for coordination and possible gaps/overlaps in work programmes or sch
17、edule conflicts/misalignment; and consider proposals for joint work, coordination, liaison, etc. -4- Rep. ITU-R BT.2003 A significant output of this meeting was the conclusion that a strong liaison is needed between the ISO/IEC JTCl/SC2/WGll, ITU-T WP XV-1, and ITU-R Working Party 11B with regard to
18、 the matter of video coding, especially as it concerns equipment for home use. was held in Tokyo in September 1991 11/9-1241. The meeting was attended by representatives of the IEC/ISO JTC-1, the ITU-T and the ITU-R (SG 11, CMTT), and was a follow-up to an earlier informal gathering of similar repre
19、sentatives. The primary purpose of the meeting was to closely coordinate two areas: standardization of network issues, to ensure similar availability timeframes and technical attributes; and standardization across different video services and coding groups, to ensure consistency in technical base an
20、d service area to maximize commonality of systems and increase interworking capability. Toward these ends, the groups represented at the meeting offered reports of current and future activities in these areas, as well as indications regarding the timeframe of standards related to video network, serv
21、ice and coding. Several matters requiring attention, including matters for ITU-R Study Group 1 1, were identified at the meeting, and a plan of action to address them was agreed upon. The range of applications for high-resolution image technology is very wide, and HDTV, as defined in Report ITU-R BT
22、.801 in both psychophysical and objective terms, might be considered to be a set of specific applications of this technology. In addition, an ITU Coordination meeting on Integrated Video Services in Broadband ISDN -5- Rep. ITU-R BT.2003 TABLE 2 Activity relationship between IEC/ISO organizations and
23、 the ITU-R The harmonization of work in the different international standards organizations which are considering HDTV requires coordination. Each organization should work within its own area of interest. Thus, it will be necessary to establish joint mechanisms or a work assignment process in areas
24、where overlapping or uncertainty of responsibility exists. It is essential to this coordination task that multilateral liaison and effective sharing of appropriate common information be established. It is noted that practical limits may exist outside which harmonization may be ineffective. * Colorim
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