ITU-R BT 601-7-2011 Studio encoding parameters of digital television for standard 4 3 and wide-screen 16 9 aspect ratios《标准比例4 3和宽屏比例16 9数字电视的演播室编码参数》.pdf
《ITU-R BT 601-7-2011 Studio encoding parameters of digital television for standard 4 3 and wide-screen 16 9 aspect ratios《标准比例4 3和宽屏比例16 9数字电视的演播室编码参数》.pdf》由会员分享,可在线阅读,更多相关《ITU-R BT 601-7-2011 Studio encoding parameters of digital television for standard 4 3 and wide-screen 16 9 aspect ratios《标准比例4 3和宽屏比例16 9数字电视的演播室编码参数》.pdf(19页珍藏版)》请在麦多课文档分享上搜索。
1、 Recommendation ITU-R BT.601-7(03/2011)Studio encoding parameters of digital television for standard 4:3 and wide-screen 16:9 aspect ratiosBT SeriesBroadcasting service(television)ii Rec. ITU-R BT.601-7 Foreword The role of the Radiocommunication Sector is to ensure the rational, equitable, efficien
2、t 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 pe
3、rformed 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. Form
4、s 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
5、 found. Series 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,
6、 radiodetermination, 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 managem
7、ent SNG Satellite 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, 2011 ITU 2011 All rights reserved. No part o
8、f this publication may be reproduced, by any means whatsoever, without written permission of ITU. Rec. ITU-R BT.601-7 1 RECOMMENDATION ITU-R BT.601-7 Studio encoding parameters of digital television for standard 4:3 and wide-screen 16:9 aspect ratios (Question ITU-R 1/6) (1982-1986-1990-1992-1994-19
9、95-2007-2011) Scope This Recommendation also covers the pixel characteristics that represent a 525- or 625-line interlace digital television image. This Recommendation specifies methods for digitally coding video signals. It includes a 13.5 MHz sampling rate for both 4:3 and 16:9 aspect ratio images
10、 with performance adequate for present transmission systems. The ITU Radiocommunication Assembly, considering a) that there are clear advantages for television broadcasters and programme producers in digital studio standards which have the greatest number of significant parameter values common to 52
11、5-line and 625-line systems; b) that a worldwide compatible digital approach will permit the development of equipment with many common features, permit operating economies and facilitate the international exchange of programmes; c) that an extensible family of compatible digital coding standards is
12、desirable. Members of such a family could correspond to different quality levels, different aspect ratios, facilitate additional processing required by present production techniques, and cater for future needs; d) that a system based on the coding of components is able to meet these desirable object
13、ives; e) that the co-siting of samples representing luminance and colour-difference signals (or, if used, the red, green and blue signals) facilitates the processing of digital component signals, required by present production techniques, recommends that the following be used as a basis for digital
14、coding standards for television studios in countries using the 525-line system as well as in those using the 625-line system. 1 Extensible family of compatible digital coding standards 1.1 The digital coding should allow the establishment and evolution of an extensible family of compatible digital c
15、oding standards. It should be possible to interface simply between any members of the family. 1.2 The digital coding should be based on the use of one luminance and two colour-difference signals (or, if used, the red, green and blue signals). 2 Rec. ITU-R BT.601-7 1.3 The spectral characteristics of
16、 the signals must be controlled to avoid aliasing whilst preserving the passband response. Filter specifications are shown in Appendix 2. 2 Specifications applicable to any member of the family 2.1 Sampling structures should be spatially static. This is the case, for example, for the orthogonal samp
17、ling structures specified in this Recommendation. 2.2 If the samples represent luminance and two simultaneous colour-difference signals, each pair of colour-difference samples should be spatially co-sited. If samples representing red, green and blue signals are used they should be co-sited. 2.3 The
18、digital standard adopted for each member of the family should permit worldwide acceptance and application in operation; one condition to achieve this goal is that, for each member of the family, the number of samples per line specified for 525-line and 625-line systems shall be compatible (preferabl
19、y the same number of samples per line). 2.4 In applications of these specifications, the contents of digital words are expressed in both decimal and hexadecimal forms, denoted by the suffixes “d” and “h” respectively. To avoid confusion between 8-bit and 10-bit representations, the eight most-signif
20、icant bits are considered to be an integer part while the two additional bits, if present, are considered to be fractional parts. For example, the bit pattern 10010001 would be expressed as 145dor 91h, whereas the pattern 1001000101 would be expressed as 145.25dor 91.4h. Where no fractional part is
21、shown, it should be assumed to have the binary value 00. 2.5 Definition of the digital signals Y, CR, CB, from the primary (analogue) signals ER , EG and EB This paragraph describes, with a view to defining the signals Y, CR, CB, the rules for construction of these signals from the gamma pre-correct
22、ed primary analogue signals ER , EG and EB . The signals are constructed by following the three stages described in 2.5.1,2.5.2 and2.5.3. The method is given as an example, and in practice other methods of construction from these primary signals or other analogue or digital signals may produce ident
23、ical results. An example is given in 2.5.4. 2.5.1 Construction of luminance (EY ) and colour-difference (ER EY ) and (EB EY ) signals The construction of luminance and colour-difference signals is as follows: EY = 0.299 ER + 0.587 EG + 0.114 EB then: BGRBGRBYBEEEEEEEEE += 886.0587.0299.0114.0587.029
24、9.0)( and BGRBGRBYBEEEEEEEEE = 114.0587.0299.0114.0587.0299.0)( Taking the signal values as normalized to unity (e.g. 1.0 V maximum levels), the values obtained for white, black and the saturated primary and complementary colours are shown in Table 1. Rec. ITU-R BT.601-7 3 TABLE 1 Normalized signal
- 1.请仔细阅读文档,确保文档完整性,对于不预览、不比对内容而直接下载带来的问题本站不予受理。
- 2.下载的文档,不会出现我们的网址水印。
- 3、该文档所得收入(下载+内容+预览)归上传者、原创作者;如果您是本文档原作者,请点此认领!既往收益都归您。
下载文档到电脑,查找使用更方便
10000 积分 0人已下载
下载 | 加入VIP,交流精品资源 |
- 配套讲稿:
如PPT文件的首页显示word图标,表示该PPT已包含配套word讲稿。双击word图标可打开word文档。
- 特殊限制:
部分文档作品中含有的国旗、国徽等图片,仅作为作品整体效果示例展示,禁止商用。设计者仅对作品中独创性部分享有著作权。
- 关 键 词:
- ITURBT60172011STUDIOENCODINGPARAMETERSOFDIGITALTELEVISIONFORSTANDARD43ANDWIDESCREEN169ASPECTRATIOS 标准

链接地址:http://www.mydoc123.com/p-790839.html