DD-IEC-TS-62312-2-2007.pdf
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1、DRAFT FOR DEVELOPMENT DD IEC/TS 62312-2:2007 Guideline for synchronization of audio and video Part 2: Methods for synchronization of audio and video systems ICS 33.160.01 ? Licensed Copy: London South Bank University, London South Bank University, Sat Sep 01 03:19:54 GMT+00:00 2007, Uncontrolled Cop
2、y, (c) BSI DD IEC/TS 62312-2:2007 This Draft for Development was published under the authority of the Standards Policy and Strategy Committee on 31 August 2007 BSI 2007 ISBN 978 0 580 58186 1 National foreword This Draft for Development is the UK implementation of IEC/TS 62312-2:2007. This publicati
3、on is not to be regarded as a British Standard. It is being issued in the Draft for Development series of publications and is of a provisional nature. It should be applied on this provisional basis, so that information and experience of its practical application can be obtained. Comments arising fro
4、m the use of this Draft for Development are requested so that UK experience can be reported to the international organization responsible for its conversion to an international standard. A review of this publication will be initiated not later than 3 years after its publication by the international
5、organization so that a decision can be taken on its status. Notification of the start of the review period will be made in an announcement in the appropriate issue of Update Standards. According to the replies received by the end of the review period, the responsible BSI Committee will decide whethe
6、r to support the conversion into an international Standard, to extend the life of the Technical Specification or to withdraw it. Comments should be sent to the Secretary of the responsible BSI Technical Committee at British Standards House, 389 Chiswick High Road, London W4 4AL. The UK participation
7、 in its preparation was entrusted to Technical Committee EPL/100, Audio, video and multimedia systems and equipment. A list of organizations represented on this committee can be obtained on request to its secretary. This publication does not purport to include all the necessary provisions of a contr
8、act. Users are responsible for its correct application. Amendments issued since publication Amd. No. DateComments Licensed Copy: London South Bank University, London South Bank University, Sat Sep 01 03:19:54 GMT+00:00 2007, Uncontrolled Copy, (c) BSI TECHNICAL SPECIFICATION IEC TS 62312-2 First edi
9、tion 2007-06 Guideline for synchronization of audio and video Part 2: Methods for synchronization of audio and video systems Reference number IEC/TS 62312-2:2007(E) DD IEC/TS 62312-2:2007 Licensed Copy: London South Bank University, London South Bank University, Sat Sep 01 03:19:54 GMT+00:00 2007, U
10、ncontrolled Copy, (c) BSI CONTENTS INTRODUCTION.3 1 Scope.4 2 Normative references .4 3 Terms and definitions .4 4 System model.5 4.1 Audio video system .5 4.2 Latency and delay .5 4.3 System model .5 4.4 Audio and video device .6 4.5 Controller 7 4.6 Source device and display device7 4.7 Controller
11、 function of audio and video device 8 5 Methods for synchronization.9 5.1 Information for synchronization9 5.1.1 Time-code information.9 5.1.2 Latency information .9 5.2 Methods for synchronization9 5.2.1 General .9 5.2.2 Method with time-code information 11 5.2.3 Method with latency information 12
12、5.3 Method with IEC 60958-3 12 5.4 Method with IEC 61883-6 12 5.5 Method with other interface specifications .13 Bibliography14 Figure 1 System model 5 Figure 2 Audio and video device 6 Figure 3 Information and control in audio and video device7 Figure 4 Source device 8 Figure 5 Display device8 Figu
13、re 6 Audio amplifier.8 Figure 7 Controller function of audio and video device .9 Figure 8 Additional delay .10 Figure 9 Multiple reproductions11 DD IEC/TS 62312-2:2007 2 Licensed Copy: London South Bank University, London South Bank University, Sat Sep 01 03:19:54 GMT+00:00 2007, Uncontrolled Copy,
14、(c) BSI INTRODUCTION Audio, video and multimedia systems and equipment have begun to use digital technologies. Digital systems or equipment may cause delay of audio and video signals because digital signal processing causes latency and delay. The unevenness of the delay between audio and video may c
15、ause synchronization problems. For instance, a digital broadcasting system uses signal compression of audio and video. A receiver has signal decoders, and this may cause unevenness of the delay between audio and video. Digital video signal processing of display causes a significant delay in the repr
16、oduction time of the video image. Another example is an audio video system consisting of a digital media player, an audio amplifier and display. A digital media player outputs audio and video signals separately to the amplifier and display through digital interfaces. This may cause synchronization p
17、roblems of audio and video when each processing time of the equipment is different. To solve synchronization problems, this technical specification gives guidelines for general methods for the synchronization of audio and video. DD IEC/TS 62312-2:2007 3 Licensed Copy: London South Bank University, L
18、ondon South Bank University, Sat Sep 01 03:19:54 GMT+00:00 2007, Uncontrolled Copy, (c) BSI GUIDELINE FOR SYNCHRONIZATION OF AUDIO AND VIDEO Part 2: Methods for synchronization of audio and video systems 1 Scope The IEC 62312 series gives guidelines for methods of synchronization of audio and video.
19、 This part of IEC 62312 describes the system model and general methods for the synchronization of audio and video. The methods exclude the synchronization of the signal source and the spatial delay of audio reproduction. 2 Normative references The following referenced documents are indispensable for
20、 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 60958-1, Digital audio interface Part 1: General IEC 60958-3, Digital audio interface Part 3: Consume
21、r applications IEC 61883-6, Consumer audio/video equipment Digital interface Part 6: Audio and music data transmission protocol 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 latency inevitable delay of signal that is caused by principle or
22、unavoidable signal processing 3.2 delay general meaning of delay other than latency, including delay that is caused by functional signal processing and delay that is set intentionally 3.3 latency information information of the sum value of latency and delay 3.4 time stamp quantized timing in which a
23、n event occurs on the basis of a reference clock DD IEC/TS 62312-2:2007 4 Licensed Copy: London South Bank University, London South Bank University, Sat Sep 01 03:19:54 GMT+00:00 2007, Uncontrolled Copy, (c) BSI 4 System model 4.1 Audio video system An audio video system consists of audio and video
24、devices and these devices may include digital signal processing that causes latency and delay. Each device is connected to the other device by analogue or digital signal interfaces. The final outputs from the audio video system to the user are reproduction of audio with speakers and visual image wit
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