SIST ISO 15740:2011

INTERNATIONAL ISO
STANDARD 15740
Second edition
2008-05-01
Photography — Electronic still picture
imaging — Picture transfer protocol (PTP)
for digital still photography devices
Photographie — Imagerie des prises de vue électroniques — Protocole
de transfert d'images (PTP) pour les appareils photographiques
électroniques numériques
Reference number
©
ISO 2008
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ii © ISO 2008 – All rights reserved

Contents Page
Foreword. v
Introduction . vi
1 Scope . 1
2 Normative references . 1
3 Terms and definitions. 1
4 Digital still photography device model. 5
4.1 Overview . 5
4.2 Baseline requirements . 6
5 Data format specification. 7
5.1 General format . 7
5.2 Data types. 7
5.3 Simple types. 9
5.4 Arrays. 11
5.5 Datasets . 12
6 Image and data object formats. 21
6.1 Object usage . 21
6.2 Thumbnail formats. 23
6.3 ObjectFormatCodes. 24
6.4 Object format version identification . 24
6.5 Data object association. 24
7 Transport requirements . 27
7.1 Disconnection events. 27
7.2 Reliable, error-free channel . 27
7.3 Asynchronous event support. 27
7.4 Device discovery and enumeration . 27
7.5 Specific transports . 27
8 Persistent storage. 28
8.1 StorageID . 28
8.2 Data object referencing. 28
8.3 Receiver object placement . 29
9 Communication protocol . 30
9.1 Device roles. 30
9.2 Sessions . 30
9.3 Transactions. 30
9.4 Operation flow. 33
9.5 Vendor extensions. 33
10 Operations . 34
10.1 Operation overview. 34
10.2 Operation parameters. 34
10.3 OperationCode format. 35
10.4 OperationCode summary. 35
10.5 Operation descriptions. 35
11 Responses. 60
11.1 ResponseCode format. 60
11.2 ResponseCode summary. 61
11.3 Response descriptions . 62
12 Events. 66
12.1 Event usage . 66
12.2 Event types . 67
12.3 Event dataset. 67
12.4 EventCode format . 68
12.5 EventCode summary . 68
12.6 Event descriptions . 68
13 Device properties . 72
13.1 Device property usage. 72
13.2 Values of a device property . 72
13.3 Device property management requirements. 73
13.4 Device property identification. 73
13.5 Device property descriptions. 76
14 Streaming (PTP v1.1 only). 93
14.1 Streaming overview . 93
14.2 Stream transfer. 93
14.3 Multiplexing . 94
14.4 Discovering and configuring stream capabilities. 94
14.5 Data transfer mechanism . 94
14.6 Packet layout . 95
14.7 Frame layout. 96
14.8 Enumerating supported streams. 96
14.9 Retrieving stream information. 96
15 Conformance section . 96
Annex A (informative) Optional device features. 99
Annex B (normative) Object referencing and format codes . 101
Annex C (informative) Operation flow example scenarios. 103
Annex D (informative) Filesystem implementation examples. 107
Annex E (informative) Reference to OSI model . 110
Annex F (informative) SendObject implementation example. 113
Bibliography . 116

iv © ISO 2008 – All rights reserved

Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies
(ISO member bodies). The work of preparing International Standards is normally carried out through ISO
technical committees. Each member body interested in a subject for which a technical committee has been
established has the right to be represented on that committee. International organizations, governmental and
non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the
International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International Standards
adopted by the technical committees are circulated to the member bodies for voting. Publication as an
International Standard requires approval by at least 75 % of the member bodies casting a vote.
Attention i
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