IEC TS 62312-1-1:2008

IEC/TS 62312-1-1
Edition 1.0 2008-03
TECHNICAL
SPECIFICATION
Guideline for synchronization of audio and video –
Part 1-1: Measurement methods for synchronization of audio and video
equipment and systems – General

IEC/TS 62312-1-1:2008(E)
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IEC/TS 62312-1-1
Edition 1.0 2008-03
TECHNICAL
SPECIFICATION
Guideline for synchronization of audio and video –
Part 1-1: Measurement methods for synchronization of audio and video
equipment and systems – General

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
PRICE CODE
N
ICS 33.160.01 ISBN 2-8318-9647-9

– 2 – TS 62312-1-1 © IEC:2008(E)

CONTENTS
FOREWORD.3

INTRODUCTION.5

1 Scope.6

2 Normative references .6

3 Terms and definitions .6

4 Measuring conditions.6

4.1 General conditions .6
4.1.1 Power supplies .6
4.1.2 Environmental conditions.7
4.2 Specific conditions .7
4.3 General settings .7
4.4 Specific settings .7
5 Measurement methods .8
5.1 General block diagram .8
5.2 Test signal source and test signal .8
5.2.1 General .8
5.2.2 Signal generator .8
5.2.3 Test disc.8
5.3 EUT.9
5.3.1 Equipment .9
5.3.2 Compound equipment.10
5.4 Measuring instruments .11
5.4.1 General .11
5.4.2 Measurement of signal .11
5.4.3 Measurement of reproduced signal.11
5.4.4 Specific requirement.12

Annex A (informative) Assessment of the result of measurement .13

Bibliography.14

Figure 1 – General block diagram for measurement .8
Figure 2 – Audio and video device .9
Figure 3 – Source device .10
Figure 4 – Display device.10
Figure 5 – Recorder device.10
Figure 6 – Compound equipment .11
Figure 7 – Measurement of reproduced signal .12

TS 62312-1-1 © IEC:2008(E) – 3 –

INTERNATIONAL ELECTROTECHNICAL COMMISSION

____________
GUIDELINE FOR SYNCHRONIZATION OF AUDIO AND VIDEO –

Part 1-1: Measurement methods for synchronization

of audio and video equipment and systems –

General
FOREWORD
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all national electrotechnical committees (IEC National Committees). The object of IEC is to promote
international co-operation on all questions concerning standardization in the electrical and electronic fields. To
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2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
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8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
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9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of
patent rights. IEC shall not be held responsible for identifying any or all such patent rights.

The main task of IEC technical committees is to prepare International Standards. In
exceptional circumstances, a technical committee may propose the publication of a technical
specification when
• the required support cannot be obtained for the publication of an International Standard,
despite repeated efforts, or
• the subject is still under technical development, or where, for any other reason, there is
the future but no immediate possibility of an agreement on an International Standard.
Technical specifications are subject to review within three years of publication to decide
whether they can be transformed into International Standards.
IEC 62312-1-1, which is a technical specification, has been prepared by IEC technical
committee 100: Audio, video and multimedia systems and equipment.

– 4 – TS 62312-1-1 © IEC:2008(E)

The text of this technical specification is based on the following documents:

Enquiry draft Report on voting

100/1270/DTS 100/1316/RVC
Full information on the voting for the approval of this technical specification can be found in

the report on voting indicated in the above table.

This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.

The list of all the parts of IEC 62312, under the general title Guideline for synchronization of
audio and video, can be found on the IEC website.
The committee has decided that the contents of this publication will remain unchanged until
the maintenance result date indicated on the IEC web site under "http://webstore.iec.ch" in
the data related to the specific publication. At this date, the publication will be
• transformed into an International standard,
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
A bilingual version of this publication may be issued at a later date.

TS 62312-1-1 © IEC:2008(E) – 5 –

INTRODUCTION
Audio and video equipment processes or reproduces the input signals of audio and video,

then outputs these signals in various forms. Audio and video equipment needs time to

process or reproduce the input signal. This time depends on the signal format, the

architecture of equipment and the design of equipment. Hence audio and video equipment

may have different output delays for audio and video signals, and this causes unsynchronised

audio and video outputs.
This Technical Specification is the general part of the measurement method for that time

difference between audio and video outputs. The other subparts of IEC/TS 62312-1 describe

specific measurement methods for specific audio and video equipment.

– 6 – TS 62312-1-1 © IEC:2008(E)

GUIDELINE FOR SYNCHRONIZATION OF AUDIO AND VIDEO –

Part 1-1: Measurement methods for synchronization

of audio and video equipment and systems –

General
1 Scope
This part of 62312 gives guidelines for methods of synchronization of audio and video.
This Technical Specification describes general measurement methods for the synchronization
of audio and video equipment.
2 Normative references
The following referenced documents are indispensable for 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.
IEC/TS 62312-2, Guideline for synchronization of audio and video – Part 2: Methods for
synchronization of audio and video systems
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply. Also the terms
and definitions given in IEC 62312-2 apply.
3.1
EUT
equipment under test
4 Measuring conditions
4.1 General conditions
4.1.1 Power supplies
4.1.1.1 Voltage
The supplied AC power voltage shall be the fixed value of the region where the equipment
under test is used. The supplied DC power voltage shall be the fixed value specified by the
manufacturer. The toleran
...