CONTENTS

RECOMMENDATION  ITU-R  BR.1352-3     3
File format for the exchange of audio programme materials with metadata on information technology media     3
Scope     4
Annex 1  Specification of the broadcast wave format   A format for audio data files in broadcasting     5
1 Introduction  5
        1.1 Normative provisions  6
2 Broadcast wave format (BWF) file  7
        2.1 Contents of a broadcast wave format file  7
        2.2 Existing chunks defined as part of the RIFF standard  7
        2.3 Broadcast audio extension chunk  7
        2.4     Universal broadcast audio extension chunk  9
Appendix 1  to Annex 1 (Informative)  RIFF WAVE (.WAV) file format     12
1 Waveform audio file format (WAVE) 12
        1.1 WAVE format chunk  12
        1.2 WAVE format categories  13
2 PCM format 13
        2.1 Data packing for PCM WAVE files  14
        2.2 Data format of the samples  14
        2.3 Examples of PCM WAVE files  15
        2.4 Storage of WAVE data  15
        2.5 Fact chunk  15
        2.6 Other optional chunks  16
3 Other WAVE types  16
        3.1 General information  16
        3.2 Fact chunk  16
Appendix 2  to Annex 1 (Informative)  Specification of the format for <CodingHistory> field     17
Appendix 3  to Annex 1  (Informative)  Definition of the format for “Unique” Source Identifier (USID)  for use in the <OriginatorReference> field     19
Appendix 4  to Annex 1 (Informative)  Definition of an optional peak envelop Level chunk <levl -ck> to the BWF     20
1 Terminology  20
        1.1 Generation of peak values  20
 2     Peak envelope chunk  21
        2.1 Elements of the “levl” chunk  21
        2.2 Format of a peak point 23
        2.3     Multichannel peak files  23
        2.4     Synchronization with the audio file  24
        2.5 Byte order 24
Appendix 5  to Annex 1  (Informative)  Definition of an optional Link chunk <link-ck> to the BWF     24
Introduction     24
1 Terminology  24
2 Link chunk structure  25
       2.1 Overview   25
       2.2 XML data structure in <xmlData> variable data field  25
       2.3 DTD for XML structure of the <link> chunk  26
3 Renaming of linked files  26
       3.1 <link> chunk of “Sinatra_1.wav”  26
       3.2 <link> chunk of “Sinatra_2.wav”  27
       3.3 <link> chunk of “Sinatra_3.wav”  27
Appendix 6  to Annex 1  (Normative)  Filename conventions     27
1 General 27
 2     File-name length  27
 3     File-name extension  28
 4     File-name character set 28
1 Introduction  29
2 MPEG audio  29
        2.1 MPEG audio extension chunk  29
Appendix 1  to Annex 2 (Informative)  RIFF WAVE (.WAV) file format     31
1 MPEG-1 audio (audio-only) 31
        1.1 Fact chunk  31
        1.2 WAVE format header 31
        1.3 Flags used in data fields  36
        1.4 Audio data in MPEG files  37
                  1.4.1 MPEG audio frames  37
                  1.4.2 Encoding  37
                  1.4.3 Decoding  38
        1.5 Ancillary data  38
Annex 3  Specification of the BWF  A format for audio data files in broadcasting  METADATA SPECIFICATIONS     39
1 Introduction  39
2 Capturing report 40
        2.1 Syntax of the capturing report 41
3 CodingHistory field in the <bext> chunk  41
4 Quality Chunk  41
        4.1 Elements of the Quality Chunk  41
5 Examples of capturing reports  44
        5.1 Digitization process of analogue material 44
        5.2 Capturing process of a compact disc  47
        5.3 Capturing process of a DAT cassette  48