1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationAudio, video and multimedia systems General channelassignment of multichannel audioBS EN 62574:2011National forewordThis British Standard is the UK implementation of EN 62574:201
2、1. It is identical to IEC 62574:2011.The UK participation 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 pur
3、port to include all the necessary provisions of a contract. Users are responsible for its correct application. BSI 2011ISBN 978 0 580 75468 5 ICS 33.160.30Compliance with a British Standard cannot confer immunity from legal obligations.This British Standard was published under the authority of the S
4、tandards Policy and Strategy Committee on 31 July 2011.Amendments issued since publicationAmd. No. Date Text affectedBRITISH STANDARDBS EN 62574:2011EUROPEAN STANDARD EN 62574 NORME EUROPENNE EUROPISCHE NORM May 2011 CENELEC European Committee for Electrotechnical Standardization Comit Europen de No
5、rmalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Management Centre: Avenue Marnix 17, B - 1000 Brussels 2011 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 62574:2011 E English version Audio, video an
6、d multimedia systems - General channel assignment of multichannel audio (IEC 62574:2011) Systmes audio, vido et multimdia - Affectation gnrale des voies des systmes audio voies multiples (CEI 62574:2011) Audio-, Video- und Multimediasysteme - Allgemeine Zuordnung der Kanle von Mehrkanal-Tonsystemen
7、(IEC 62574:2011) This European Standard was approved by CENELEC on 2011-05-12. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and
8、 bibliographical references concerning such national standards may be obtained on application to the Central Secretariat or to any CENELEC member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the respons
9、ibility of a CENELEC member into its own language and notified to the Central Secretariat has the same status as the official versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic, Denmark, Estonia, Finland, France,
10、Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. ICS 33.160.30 BS EN 62574:2011EN 62574:2011 - 2 - Foreword The text of document 100/1706
11、/CDV, future edition 1 of IEC 62574, prepared by IEC TC 100, Audio, video and multimedia systems and equipment, was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as EN 62574 on 2011-05-12. Attention is drawn to the possibility that some of the elements of this document may b
12、e the subject of patent rights. CEN and CENELEC shall not be held responsible for identifying any or all such patent rights. The following dates were fixed: latest date by which the EN has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 20
13、12-02-12 latest date by which the national standards conflicting with the EN have to be withdrawn (dow) 2014-05-12 _ Endorsement notice The text of the International Standard IEC 62574:2011 was approved by CENELEC as a European Standard without any modification. _ BS EN 62574:2011 3 62574 IEC:2011 C
14、ONTENTS 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 Table 1 General c
15、hannel assignment table. 12 BS EN 62574:201162574 IEC:2011 4 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 fro
16、m each other. These can be unified to one common channel as-signment 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. BS EN 62574:2011 5 62574 IEC:2
17、011 AUDIO, VIDEO AND MULTIMEDIA SYSTEMS GENERAL CHANNEL ASSIGNMENT OF MULTICHANNEL 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
18、 assignments for source devices, digital audio interfaces and sink devices. This 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 specifi
19、ed, which can be used for all current multichannel formats. 2 Terms and definitions 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 midd
20、le layer. The other two planes are always indicated. See also Table 1. 2.1 top 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
21、 layer of three loudspeaker-layers located at the vertical centre of the TV screen, 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; louds
22、peaker channels of the bottom layer are annotated with the letters Bt 2.4 front 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 loud
23、speaker position located in the middle layer corresponding to the centre of the TV screen, as viewed from the seating area BS EN 62574:201162574 IEC:2011 6 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
24、 channel to compesate for low frequency band of each loudspeaker 2.8 low frequency effects 1 LFE1 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 als
25、o used, the LFE1 loudspeaker position is normally located far left front at the bottom layer. 2.9 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 loudspeake
26、r position located mid-way between the front centre and front left of the middle layer 2.12 front 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 2.1
27、4 low frequency effects 2 LFE2 LFE loudspeaker position located at the bottom layer and normally 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 BS EN
28、62574:2011 7 62574 IEC:2011 2.17 top front left TpFL loudspeaker position located at far left front of the top layer 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 2.2
29、0 top centre TpC loudspeaker position located at the centre of the top layer directly above the seating area 2.21 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 l
30、eft TpSiL loudspeaker position located on the left of the top layer 2.24 top side right TpSiR loudspeaker position 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 a
31、t centre front of the bottom layer 2.27 bottom front left BtFL loudspeaker position located at far left front of the bottom layer BS EN 62574:201162574 IEC:2011 8 2.28 bottom front right BtFR loudspeaker position located at far right front of the bottom layer 2.29 front left wide FLw loudspeaker pos
32、ition 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 the left side of the middle layer starting approximately 1/3 of the d
33、istance from the screen to the back wall 2.32 right surround RS array of loudspeakers positioned along the right side of the middle layer starting approximately 1/3 of the distance from the screen to the back wall 2.33 left surround direct LSd loudspeaker position located on the left wall of the mid
34、dle layer for localized directionality as opposed to the diffuse array 2.34 right surround direct RSd loudspeaker position located on the right wall of the middle layer for localized directionality as opposed to the diffuse array 2.35 top left surround TpLS array of loudspeakers positioned along the
35、 right side of the top layer starting approximately 1/3 of the distance from the screen to the back wall 2.36 top right surround TpRS array of loudspeakers positioned along the right side of the top layer starting approximately 1/3 of the distance from the screen to the back wall 3 General channel a
36、ssignment 3.1 General The channel assignment specifies the channels of multichannel audio, the loudspeaker assignment is the loudspeaker position of its channels. BS EN 62574:2011 9 62574 IEC:2011 3.2 Model Figure 1 shows the model of channel assignment spaces with the three layers, and a listener i
37、s located in the centre of the bottom layer. The middle layer is located at the vertical centre of the picture screen or, alternatively, at the same height as the height of a listeners ear. This model specifies the general channel assignments in these three layers, which are the top layer, the middl
38、e layer and the bottom layer. Each layer specifies channels in its layer. Figure 1 Model of channel spaces Figure 2 shows the top layer with its channel assignments, Figure 3 shows the middle layer with its channel assignments, and Figure 4 shows the bottom layer with its channel assignments. Top la
39、yer Middle layer Bottom layer IEC 627/11 BS EN 62574:201162574 IEC:2011 10 Figure 2 Top layer Figure 3 Middle layer Figure 4 Bottom layer TpFL TpFC TpFR TpSiL TpLS TpBL TpBC TpBR TpRS TpSiR TpC Top layer FLw FL FLc FC FRc FR FRw SiL LS BL BC BR RS SiR LSd RSd Middle BtFL BtFC BtFR LFE1 LFE2 Bottom l
40、ayerIEC 628/11 IEC 629/11 IEC 630/11 BS EN 62574:2011 11 62574 IEC:2011 3.3 Channel maps and labels Table 1 shows the definition of channel maps and labels of the general channel assignments. The channel label has an ID name as abbreviation label for each channel label. Each name is case sensitive.
41、Table 1 General channel assignment table Channel number Channel label ID name Full name of ID 1/2 FL/FR Front Left/Front Right 3/4 FC/LFE1 Front Centre/Low Frequency Effects-1 5/6 BL/BR Back Left/Back Right 7/8 FLc/FRc Front Left centre/Front Right centre 9/10 BC/LFE2 Back Centre/Low Frequency Effec
42、ts-2 11/12 Sil/SiR Side Left/Side Right 13/14 TpFL/TpFR Top Front Left/Top Front Right 15/16 TpFC/TpC Top Front Centre/Top Centre 17/18 TpBL/TpBR Top Back Left/Top Back Right 19/20 TpSiL/TpSiR Top Side Left/Top Side Right 21/22 TpBC/BtFC Top Back Centre/Bottom Front Centre 23/24 BtFL/BtFR Bottom Fro
43、nt Left/Bottom Front Right 25/26 FLw/FRw Front Left wide/Front Right wide 27/28 LS/RS Left Surround/Right Surround 29/30 LSd/RSd Left Surround direct/Right Surround direct 31/32 TpLS/TpRS Top Left Surround/Top Right Surround BS EN 62574:201162574 IEC:2011 12 Bibliography SMPTE 2036-2-2008, Ultra Hig
44、h Definition Television Audio Characteristics and Audio Channel Mapping for Program Production _ BS EN 62574:2011This page deliberately left blankBSI is the independent national body responsible for preparing British Standardsand other standards-related publications, information and services. It pre
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