1、 IEC 62574 Edition 1.0 2011-04 INTERNATIONAL STANDARD NORME INTERNATIONALE Audio, video and multimedia systems General channel assignment of multichannel audio Systmes audio, vido et multimdia Affectation gnrale des voies des systmes audio voies multiples IEC 62574:2011 THIS PUBLICATION IS COPYRIGHT
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16、 csciec.ch Tl.: +41 22 919 02 11 Fax: +41 22 919 03 00 IEC 62574 Edition 1.0 2011-04 INTERNATIONAL STANDARD NORME INTERNATIONALE Audio, video and multimedia systems General channel assignment of multichannel audio Systmes audio, vido et multimdia Affectation gnrale des voies des systmes audio voies
17、multiples INTERNATIONAL ELECTROTECHNICAL COMMISSION COMMISSION ELECTROTECHNIQUE INTERNATIONALE M ICS 33.160.30 PRICE CODE CODE PRIX ISBN 978-2-88912-428-2 Registered trademark of the International Electrotechnical Commission Marque dpose de la Commission Electrotechnique Internationale 2 62574 IEC:2
18、011 CONTENTS FOREWORD . 3 INTRODUCTION . 5 1 Scope . 6 2 Terms and definitions . 6 3 General channel assignment 9 3.1 General . 9 3.2 Model 10 3.3 Channel maps and labels 12 Bibliography 13 Figure 1 Model of channel spaces 10 Figure 2 Top layer 11 Figure 3 Middle layer . 11 Figure 4 Bottom layer. 11
19、 Table 1 General channel assignment table. 12 62574 IEC:2011 3 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ AUDIO, VIDEO AND MULTIMEDIA SYSTEMS GENERAL CHANNEL ASSIGNMENT OF MULTICHANNEL AUDIO FOREWORD 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardizat
20、ion comprising 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 this end and in addition to other activities, IEC publishes Internatio
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29、to the Normative references cited in this publication. Use of the referenced publications is indispensable for the correct application of this publication. 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
30、 held responsible for identifying any or all such patent rights. International Standard IEC 62574 has been prepared by IEC technical committee 100: Audio, video and multimedia systems and equipment. The text of this standard is based on the following documents: CDV Report on voting 100/1706/CDV 100/
31、1773/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. 4 62574 IEC:2011 The committee has decided that the content
32、s of this publication will remain unchanged until the stability 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 reconfirmed, withdrawn, replaced by a revised edition, or amended. 62574 IEC:2011 5
33、INTRODUCTION There are many multichannel audio formats and there will be new formats. These formats have a specific channel assignment such as a channel mapping and channel labels, but the basic channel assignments are not so different from each other. These can be unified to one common channel assi
34、gnment as the general channel assignment. This general channel assignment provides audio devices and digital audio interfaces with the usage of unified channel assignments for any multichannel audio formats. 6 62574 IEC:2011 AUDIO, VIDEO AND MULTIMEDIA SYSTEMS GENERAL CHANNEL ASSIGNMENT OF MULTICHAN
35、NEL AUDIO 1 Scope This International Standard specifies the general channel assignment for multichannel audio formats. The general channel assignment as a channel mapping and labeling provides the unified usage of channel assignments for source devices, digital audio interfaces and sink devices. Thi
36、s standard excludes the specification of the exact position of each loudspeaker. It is aimed at consumer applications, but is not targeted for theatrical environments. Up to 32 labels for loudspeaker positions are specified, which can be used for all current multichannel formats. 2 Terms and definit
37、ions For the purposes of this document, the following terms and definitions apply. NOTE The general sequence of position labels is used: height, front/back, left/centre/right. Absence of a height letter indicates the middle layer. The other two planes are always indicated. See also Table 1. 2.1 top
38、layer top (highest) layer of three loudspeaker-layers located at the top of the screen, alternatively at the top of the room; loudspeaker channels of the top layer are annotated with the letters Tp 2.2 middle layer middle layer of three loudspeaker-layers located at the vertical centre of the TV scr
39、een, alternatively at the same height as the height of viewers ear 2.3 bottom layer bottom (lowest) layer of three loudspeaker-layers located at the bottom of the TV screen, alternatively at floor level of the room; loudspeaker channels of the bottom layer are annotated with the letters Bt 2.4 front
40、 left FL loudspeaker position located at far left and centred vertically of the middle layer 2.5 front right FR loudspeaker position located at far right and centred vertically of the middle layer 2.6 front centre FC loudspeaker position located in the middle layer corresponding to the centre of the
41、 TV screen, as viewed from the seating area 62574 IEC:2011 7 2.7 low frequency effects LFE carry only sound effects in low frequency band, generally below 120 Hz; the LFE channel is not used as a subwoofer channel to compesate for low frequency band of each loudspeaker 2.8 low frequency effects 1 LF
42、E1 LFE loudspeaker position located at the bottom layer NOTE When mono LFE is used, it is conveyed in the LFE1 channel and the LFE1 loudspeaker position at the bottom layer is not defined. When LFE2 is also used, the LFE1 loudspeaker position is normally located far left front at the bottom layer. 2
43、.9 back left BL loudspeaker position located at far left back of the middle layer 2.10 back right BR loudspeaker position located at far right back of the middle layer 2.11 front left centre FLc loudspeaker position located mid-way between the front centre and front left of the middle layer 2.12 fro
44、nt right centre FRc loudspeaker position located mid-way between the front centre and front right of the middle layer 2.13 back centre BC loudspeaker position located at centre back of the middle layer 2.14 low frequency effects 2 LFE2 LFE loudspeaker position located at the bottom layer and normall
45、y far right front, when LFE1 is used 2.15 side left SiL loudspeaker position located on the left of the middle layer 2.16 side right SiR loudspeaker position located on the right of the middle layer 8 62574 IEC:2011 2.17 top front left TpFL loudspeaker position located at far left front of the top l
46、ayer 2.18 top front right TpFR loudspeaker position located at far right front of the top layer 2.19 top front centre TpFC loudspeaker position located at centre front of the top layer 2.20 top centre TpC loudspeaker position located at the centre of the top layer directly above the seating area 2.2
47、1 top back left TpBL loudspeaker position located at far left back of the top layer 2.22 top back right TpBR loudspeaker position located at far right back of the top layer 2.23 top side left TpSiL loudspeaker position located on the left of the top layer 2.24 top side right TpSiR loudspeaker positi
48、on located on the right of the top layer 2.25 top back centre TpBC loudspeaker position located at centre back of the top layer 2.26 bottom front centre BtFC loudspeaker position located at centre front of the bottom layer 2.27 bottom front left BtFL loudspeaker position located at far left front of
49、 the bottom layer 62574 IEC:2011 9 2.28 bottom front right BtFR loudspeaker position located at far right front of the bottom layer 2.29 front left wide FLw loudspeaker position located at front left end in the room in the middle layer 2.30 front right wide FRw loudspeaker position located at front right end in the room in the middle layer 2.31 left surround LS array of loudspeakers positioned along
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