IEC INTERNATIONAL STANDARD 62297-1 First edition 2005-05 Triggering messages for broadcast applications Part 1: Format IEC Referencenumber IEC 62297-1:2005(E) Publication numbering As from 1 January 1997 all IEC publications are issued with a designation in the 60000 series.For example, IEC 34-1is now referred to as IEC 60034-1. Consolidated editions The IEc is now publishing consolidated versions of its publications. For example. edition numbers 1.0, 1.1 and 1.2 refer, respectively,to the base publication, the amendments 1 and 2. FurtherinformationonIECpublications The technical content of IEC publications is kept under constant review by the IEC, this.publication, including itsvalidity, is available in the IEc Catalogue of publications (see below) in addition to new editions, amendments and corrigenda. information on the subjects under consideration and work in progress undertaken by the technical committee which has prepared this publication, as well as the list of publications issued, is also available from the following: IEc Web Site (www.iec.ch) Catalogue of IEC publications The on-line catalogue on the IEC web site (www.iec.ch/searchpub) enables you to search by a variety of criteria including text searches, technical committees and date of publication. On-line information is also available on recently issued publications, withdrawn and replaced publications, as well as corrigenda. IEC Just Published This summary of recently issued publications (www.iec.ch/online news/ justpub) is also available by email.Please contact the Customer Service Centre (see below) forfurther information. Customer Service Centre If you have any questions regarding this publication or need further assistance. please contact the Customer Service Centre: Email: [email protected] Tel: +41 22 919 02 11 +41229190300 Fax: IEC INTERNATIONAL STANDARD 62297-1 First edition 2005-05 Triggeringmessages for broadcast applications Part 1: Format IEC 2005—Copyright-all rightsreserved mechanical, including photocopying and microfilm, without permission in writing from the publisher. International Electrotechnical Commission, 3, rue de Varembe, PO Box 131, CH-1211 Geneva 20, Switzerland Telephone: +41 22 919 02 11 Telefax: +41 22 919 03 00 E-mail: [email protected] Web: www.iec.ch s IEC PRICECODE Commission Electrotechnique Internationale International Electrotechnical Commission MexAyHapoAHag3nekTpoTexHwyeckag KomwcCg Forprice, see current cafalogue 62297-1@IEC:2005(E) 2 CONTENTS FOREWORD. INTRODUCTION. Scope. 6 2 Normativereferences .6 3 Terms, definitions and abbreviations 3.1 Definitions. 6 3.2 Abbreviations 8 Trigger message 4 4.1 General 9 4.1.1 Viewerinteraction. 4.1.2 Priority ratings. 4.1.3 Character coding . 4.1.4 Future compatibility 4.2 4.2.1 Trigger message and event message life cycle 4.2.2 Event message preparation life cycle.. 4.2.3 Application life cycle. 11 4.3 Syntax of trigger message.. 4.3.1 General. 13 4.3.2 Trigger text length . 13 4.3.3 Syntax of trigger text 4.3.4 Trigger repetition.. 17 AnnexA(informative)Recommendations. 18 AnnexB(informative)Codeof practice 19 Bibliography. Figure1-Triggermessagesand eventmessages lifecycle. 10 Figure 2 - TriggerObject life cycle .. Figure3-ApplicationObject lifecycle Figure B.1-lcon bitmap tailored for a display with a resolution of 640 by 480 ..20 Table 1 - Syntax of trigger_message 13 Table 2 - Syntax of trigger_text .. .13 - 3 - 62297-1IEC:2005(E) INTERNATIONALELECTROTECHNICALCOMMISSION TRIGGERINGMESSAGESFORBROADCASTAPPLICATIONS Part 1: Format FOREWORD The International Electrotechnical Commission (IEC)is a worldwide organization for standardization comprising 11 all national electrotechnical committees (IEC National Committees). The object of IEC is to promote Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as "IEC Publication(s)"). .Their preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with may