1、 IEC 62375 Edition 1.0 2004-02 INTERNATIONAL STANDARD NORME INTERNATIONALE Video systems (625/50 progressive) Video and accompanied data using the vertical blanking interval Analogue interface Systmes vido (625/50 progressif) Donnes vido et donnes associes utilisant lintervalle de suppression de tra
2、me Interface analogique IEC 62375:2004 THIS PUBLICATION IS COPYRIGHT PROTECTED Copyright 2004 IEC, Geneva, Switzerland All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopy
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16、 1.0 2004-02 INTERNATIONAL STANDARD NORME INTERNATIONALE Video systems (625/50 progressive) Video and accompanied data using the vertical blanking interval Analogue interface Systmes vido (625/50 progressif) Donnes vido et donnes associes utilisant lintervalle de suppression de trame Interface analo
17、gique INTERNATIONAL ELECTROTECHNICAL COMMISSION COMMISSION ELECTROTECHNIQUE INTERNATIONALE P ICS 33.160.40 PRICE CODE CODE PRIX ISBN 978-2-83220-240-1 Registered trademark of the International Electrotechnical Commission Marque dpose de la Commission Electrotechnique Internationale Warning! Make sur
18、e that you obtained this publication from an authorized distributor. Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agr. 2 62375 IEC:2004 CONTENTS FOREWORD . 3 1 Scope . 5 2 Normative references . 5 3 Terms, definitions, symbols and abbreviated terms . 5
19、3.1 Terms and definitions 5 3.2 Symbols and abbreviated terms. 5 4 Defined signal 6 5 Construction of identification signal 6 5.1 Position . 6 5.2 Clock frequency 6 5.3 Signal amplitude 7 5.4 Modulation coding . 7 5.5 Preamble . 7 5.6 Data bits 7 6 Information content of data bits 9 6.1 Data group 1
20、, Aspect ratio . 9 6.2 Data group 2, Reserved 10 6.3 Data group 3, Subtitles 10 6.4 Data group 4, Surround sound and CGMS-A . 11 Annex A (informative) Rules of operation 12 Annex B (informative) Recommendation . 13 Annex C (informative) Guideline . 14 Bibliography 15 62375 IEC:2004 3 INTERNATIONAL E
21、LECTROTECHNICAL COMMISSION _ VIDEO SYSTEMS (625/50 PROGRESSIVE) VIDEO AND ACCOMPANIED DATA USING THE VERTICAL BLANKING INTERVAL ANALOGUE INTERFACE FOREWORD 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising all national electrotechnical
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34、 IEC:2004 International Standard IEC 62375 has been prepared by IEC technical committee 100: Audio, video and multimedia systems and equipment. This bilingual version (2012-08) corresponds to the monolingual English version, published in 2004-02. The text of this standard is based on the following d
35、ocuments: CDV Report on voting 100/689/CDV 100/754/RVC Full information on the voting for the approval of this standard can be found in the report on voting indicated in the above table. The French version of this standard has not been voted upon. This publication has been drafted in accordance with
36、 the ISO/IEC Directives, Part 2. The committee has decided that the contents of this publication will remain unchanged until 2006. At this date, the publication will be reconfirmed; withdrawn; replaced by a revised edition, or amended. 62375 IEC:2004 5 VIDEO SYSTEMS (625/50 PROGRESSIVE) VIDEO AND AC
37、COMPANIED DATA USING THE VERTICAL BLANKING INTERVAL ANALOGUE INTERFACE 1 Scope This International Standard specifies the method of transfer of aspect ratio information code, copy control information code and other codes in the vertical blanking interval of the luminance signal. This International St
38、andard is applicable to the transfer of video related information with the video signal through the baseband analogue signal of 625-line/50-frame progressive scan video system between digital and analogue video equipments. 2 Normative references The following referenced documents are indispensable f
39、or the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ITU-R BT.1358: Studio parameters of 625 and 525 line progressive scan television systems 3 Terms, defin
40、itions, symbols and abbreviated terms 3.1 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1.1 letterbox picture display format to display a picture with an aspect ratio greater than the screen, in such a way that empty (black) lines are added to
41、conform to the screen 3.1.2 full format picture display format with full screen size conforming to its scanning format 3.1.3 CGMS-A copy generation management system on analogue video interface, for use in digital video recorders and digital video equipments 3.2 Symbols and abbreviated terms 0 hfall
42、ing sync edge a aspect ratio F Sclock frequency LSB Least Significant Bit MSB Most Significant Bit NRZ Non-Return-to-Zero T ddata bit period T ssampling period 6 62375 IEC:2004 4 Defined signal The signal defined in this standard is defined for use with systems complying with ITU-R BT.1358. 5 Constr
43、uction of identification signal 5.1 Position The identification signal bits shall be transmitted as a data burst in the first part of line 43. The position of the beginning of the bits shall be 5,5 s 0,125 s from 0 hof the horizontal sync, as indicated in Figure 1. This figure is intended to illustr
44、ate the position of the signalling bits in line 43. In each frame, line 43 shall be occupied with this identification signal. Peak white level Sync. level 500 mV 25 mV 13,7 s b 19,2 s 5,25 s a 5,5 s 0,125 s 0,75 s 0 h IEC 064/04Key a: Period from sync to the start point of the video effective area.
45、b: For optimum decoder performance, it is recommended that this period be free from other signals. Figure 1 Position of identification signal bits in line 43 5.2 Clock frequency The clock frequency shall be: F s= 10 MHz 1 kHz The sampling period shall be: T s= 100 ns 62375 IEC:2004 7 5.3 Signal ampl
46、itude The signal amplitude with respect to maximum video signal amplitude of 700 mV shall be: 500 mV 25 mV 5.4 Modulation coding Bi-phase coding shall be used in accordance with Figure 2. Duration of one data bit: T d+ 1 + 1 1 1 0 T d + 1 + 1 1 1 1 0 0 0 1 1 NRZ-Level Bi-Phase Level 1 T s T d IEC 06
47、5/04Figure 2 Example of bi-phase-L coding The data bits shall be inserted in bi-phase-L, in which one data bit period equals 2 3 clock periods, whereby T d= 6 T s5.5 Preamble The preamble contains a run-in and a start code. The preamble shall be in accordance with Table 1. 5.6 Data bits There shall
48、be 14 bits in total. 1 out of these 14 bits shall be allocated to the error detection code. There shall be 13 data-bits available for transmission of information. 8 62375 IEC:2004 Table 1 Identification signal bits transmission scheme Identification signal bits transmission Insertion: line 43 Coding
49、: Bi-phase modulation coding Clock: 10 MHz (T s= 100 ns) Run-in Start code Group 1 aspect ratio Group 2 reserved Group 3 subtitles Group 4 others 29 elements based on 10 MHz 24 elements based on 10 MHz 24 elements based on 10 MHz 24 elements based on 10 MHz 18 elements based on 10 MHz 18 elements based on 10 MHz bit numbering 0 1 2 3 LSB MSB per info bit (note) “0“ = 000 111 “1
