1、 IEC 62503Edition 1.0 2008-09INTERNATIONAL STANDARD Multimedia quality Method of assessment of synchronization of audio and video IEC 62503:2008(E)LICENSED TO MECON Limited.-RANCHI/BANGALOREFOR INTERNAL USE AT THIS LOCATION ONLY,SUPPLIED BY BOOK SUPPLY BUREAU.THIS PUBLICATION IS COPYRIGHT PROTECTED
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9、CHI/BANGALOREFOR INTERNAL USE AT THIS LOCATION ONLY,SUPPLIED BY BOOK SUPPLY BUREAU.IEC 62503Edition 1.0 2008-09INTERNATIONAL STANDARD Multimedia quality Method of assessment of synchronization of audio and video INTERNATIONAL ELECTROTECHNICAL COMMISSION MICS 33.160.01 PRICE CODEISBN 2-8318-9986-9 Re
10、gistered trademark of the International Electrotechnical Commission LICENSED TO MECON Limited.-RANCHI/BANGALOREFOR INTERNAL USE AT THIS LOCATION ONLY,SUPPLIED BY BOOK SUPPLY BUREAU.2 62503 IEC:2008(E)CONTENTS FOREWORD.3 INTRODUCTION.5 1 Scope.6 2 Normative reference.6 3 Terms and definitions.6 4 Ove
11、rview of methods of assessment.7 5 Subjective assessment of lip sync.7 5.1 Items to be assessed.7 5.2 Preparation of test video clips and test video sequence.8 5.2.1 Selection of content of a test video clip.8 5.2.2 Creation of a test video sequence.8 5.3 Procedures and condition for assessment of l
12、ip sync at the section 3-3.9 5.4 Reporting of the result of assessment.9 6 Data processing.10 6.1 Items to be assessed.10 6.2 Method of assessment.10 6.3 Reporting of the result of estimation.11 Bibliography.12 Figure 1 Overview.7 Figure 2 Preparation of test video clips with time shifted audio.8 Fi
13、gure 3 An example of subjective assessment of lip sync.10 Figure 4 Normalized response for grading impairment caused by lip sync mismatch.11 Table 1 Five-grade impairment scale and explanation of subjective opinion score.9 LICENSED TO MECON Limited.-RANCHI/BANGALOREFOR INTERNAL USE AT THIS LOCATION
14、ONLY,SUPPLIED BY BOOK SUPPLY BUREAU.62503 IEC:2008(E)3 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ MULTIMEDIA QUALITY METHOD OF ASSESSMENT OF SYNCHRONIZATION OF AUDIO AND VIDEO FOREWORD 1)The International Electrotechnical Commission(IEC)is a worldwide organization for standardization comprising all
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