1、BRITISH STANDARD BS EN 61603-8-1:2004 Transmission of audio and/or video and related signals using infrared radiation Part 8-1: Digital audio and related signals The European Standard EN 61603-8-1:2004 has the status of a British Standard ICS 33.160.99; 33.040.20 BS EN 61603-8-1:2004 This British St
2、andard was published under the authority of the Standards Policy and Strategy Committee on 30 April 2004 BSI 30 April 2004 ISBN 0 580 43725 6 National foreword This British Standard is the official English language version of EN 61603-8-1:2004. It is identical with IEC 61603-8-1:2003. It partially s
3、upersedes BS EN 61603-2:1997. The UK participation in its preparation was entrusted to Technical Committee EPL/100, Audio, video and multimedia systems, which has the responsibility to: A list of organizations represented on this committee can be obtained on request to its secretary. Cross-reference
4、s The British Standards which implement international or European publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Sta
5、ndards Online. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to th
6、e responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside fr
7、ont cover, the EN title page, pages 2 to 50, an inside back cover and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. Date CommentsEUROPEAN STANDARD EN 61603-8-1 NORME EUROPENNE EUROPISCHE NOR
8、M April 2004 CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B - 1050 Brussels 2004 CENELEC - All rights of exploitation in any form and by any me
9、ans reserved worldwide for CENELEC members. Ref. No. EN 61603-8-1:2004 E ICS 33.160.99; 33.040.20 Partly supersedes EN 61603-2:1997English version Transmission of audio and/or video and related signals using infrared radiation Part 8-1: Digital audio and related signals (IEC 61603-8-1:2003) Transmis
10、sion de signaux audio et/ou vido et de signaux similaires au moyen de rayonnement infrarouge Partie 8-1 : Signaux audio numrique et similaires (CEI 61603-8-1:2003) bertragung von Ton- und/oder Bildsignalen und verwandten Signalen mit Infrarotstrahlung Teil 8-1: Digitale Audiosignale und zugeordnete
11、Signale (IEC 61603-8-1:2003) This European Standard was approved by CENELEC on 2004-04-01. 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-da
12、te lists and 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
13、 the responsibility 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, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Gr
14、eece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. Foreword The text of document 100/628/FDIS, future edition 1 of IEC 61603-8-1, prepared by IEC TC 100, Audio, video
15、and multimedia systems and equipment, was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as EN 61603-8-1 on 2004-04-01. This European Standard replaces subclause 6.8.3 of EN 61603-2:1997. The following dates were fixed: latest date by which the EN has to be implemented at nat
16、ional level by publication of an identical national standard or by endorsement (dop) 2005-04-01 latest date by which the national standards conflicting with the EN have to be withdrawn (dow) 2007-04-01 Annex ZA has been added by CENELEC. _ Endorsement notice The text of the International Standard IE
17、C 61603-8-1:2003 was approved by CENELEC as a European Standard without any modification. _ Page2 EN6160381:2004CONTENTS 1 Scope.6 2 Normative references.6 3 Terms, definitions and abbreviations 6 4 System description.7 4.1 General.7 4.2 Area of application8 4.3 Band allocation.8 5 General character
18、istics.10 5.1 Environment conditions for operation 10 5.2 Partition of functions between elements of the systems.10 6 Specific requirements.10 6.1 Block diagram.10 6.2 Input and output11 6.3 Carrier.11 6.4 Sub-carrier11 6.5 Channel allocation.11 6.6 Block structure13 6.7 Source stream.13 6.8 Transmi
19、ssion stream.18 6.9 Modulation 19 7 Characteristics and measurements.25 7.1 Test conditions25 7.2 Location25 7.3 Transmitting distance and directivity25 7.4 Spurious level.27 7.5 Accuracy of transmission-check frequency 27 8 Marking and contents of specifications .27 8.1 Marking.27 8.2 Contents of s
20、pecifications .27 Annex A (normative) Application of the transmission systems for digital audio and related signals using infrared radiation in the consumer audio mode.32 Annex B (normative) Application of the transmission systems for digital audio and related signals using infrared radiation in the
21、 professional audio mode.41 Annex ZA (normative) Normative references to international publications with their corresponding European publications .50 Page3 EN6160381:2004Figure 1 System concept .8 Figure 2 IEC 61603 band allocation .9 Figure 3 Band allocation 9 Figure 4 Transmitter 10 Figure 5 Chan
22、nel-coding block.11 Figure 6 Channel allocation .12 Figure 7 Block structure.13 Figure 8 Source stream14 Figure 9 Source_block stream14 Figure 10 Source_info stream 15 Figure 11 Block alignment16 Figure 12 Parity check matrix.17 Figure 13 Error correction code block 17 Figure 14 Transmission stream
23、18 Figure 15 The order bytes in Tr_section.19 Figure 16 Modulation block 20 Figure 17 Byte to symbol conversion20 Figure 18 XOR gates .21 Figure 19 Scramble pattern generator21 Figure 20 QPSK mapping.22 Figure 21 Baseband filter characteristics .23 Figure 22 Transmission chain 28 Figure 23 Location
24、for measurements 28 Figure 24 Transmitting distance.28 Figure 25 Angle of half optical radiant intensity28 Figure 26 Optical axis of the transmitter.29 Figure 27 Optical axis of the receiver.29 Figure 28 Characteristics of the transmitter29 Figure 29 Directivity characteristics of the transmitter 30
25、 Figure 30 Characteristics of the receiver30 Figure 31 Directivity characteristics of the receiver 31 Figure 32 Measuring system for spurious emission 31 Figure A.1 Source_info structure32 Figure A.2 crc_area .37 Figure A.3 Linear feedback shift register circuit .37 Figure A.4 Sub-frame structure of
26、 full-band mode 38 Figure A.5 Sub-frame structure of half-band mode.40 Figure B.1 Source_info structure41 Figure B.2 CRC area .45 Figure B.3 Linear feedback shift register circuit .46 Figure B.4 Sub-frame structure of full-band mode 46 Figure B.5 Sub-frame structure of half-band mode.49 Page4 EN6160
27、381:2004 Table 1 Analogue audio channel allocation 9 Table 2 Sub-carrier frequency11 Table 3 Maximum source stream bit rate12 Table 4 Bit rate of digital audio 12 Table 5 Byte values in a transmission_info .15 Table 6 Reed-Solomon code parameter .16 Table 7 Header bit field19 Table 8 Marking and con
28、tents of specifications 27 Table A.1 crc_flag34 Table A.2 Valid_flag.34 Table A.3 Data_type 34 Table A.435 Table A.5 Mode_extension_code .35 Table A.6 pro_flag .35 Table A.7 pcm_id.35 Table A.8 Copyright_flag36 Table A.9 Emphasis.36 Table A.10 fs_code36 Table A.11 Mode_extension_code .39 Table B.1 C
29、rc_flag .43 Table B.2 Valid_flag.43 Table B.3 Data_type 43 Table B.4 Coding_mode.43 Table B.5 Mode_extension_code .44 Table B.6 pro_flag .44 Table B.7 pcm_id.44 Table B.8 Emphasis.44 Table B.9 fs_code45 Table B.10 Mode_extension_code .48 Page5 EN6160381:2004TRANSMISSION OF AUDIO AND/OR VIDEO RELATED
30、 SIGNALS USING INFRARED RADIATION Part 8-1: Digital audio and related signals 1 Scope This part of IEC 61603 specifies the characteristics and measuring methods for digital audio signal transmission systems using infrared radiation with sub-carrier of the frequency ranges 3 MHz to 6 MHz. It describe
31、s systems with different economic uses of the available bandwidth in order to obtain minimum interference and maximum compatibility. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies.
32、 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: Consumer applications IEC 60958-4, Digital Audio Interface Part 4: Professional applications IE
33、C 61603-1:1997, Transmission of audio and/or video and related signals using infrared radiation Part 1: General IEC 61603-2:1997, Transmission of audio and/or video and related signals using infrared radiation Part 2: Transmission systems for audio wide band and related signals IEC 61937:2000, Digit
34、al audio Interface for non-linear PCM encoded audio bitstreams applying IEC 60958 IEC 61938, Audio and audiovisual systems Interconnections and matching values Preferred matching values of analogue signals 3 Terms, definitions and abbreviations 3.1 Terms and definitions For the purposes of this part
35、 of IEC 61603, the definitions given in Part 1 together with the following apply. 3.1.1 source stream source_block stream with a corresponding source_info stream and transmission_info stream 3.1.2 block_structure structure of data and parties for transmission Page6 EN6160381:2004 3.1.3 Tr_section in
36、terleaved stream from the block_structure 3.2 Abbreviations For the purposes of this part of IEC 61603, the following abbreviations apply. IR infrared (see IEC 61603-1) PD photo diode O/E optical/ electrical Tx transmitter/ radiator Rx receiver QPSK quadrature phase shift keying DQPSK differential e
37、ncoded QPSK Transmission_info transmission information CRC cyclic redundancy check source_info source information Sync Gen. sync pattern generator Header Gen. header generator GF galois field RS Reed-Solomon code ECC error correction code 4 System description 4.1 General This part of 61603 defines a
38、n application using digital audio signals based on the digital audio interface, IEC 60958, for professional and consumer applications. This includes an ability to transmit non-linear PCM data formatted according to IEC 61937. The digital audio bitstream transmission systems that are the subject of t
39、his document are characterized by the following features: used for interface with infrared radiation, harmonized with IEC 60958; harmonized with IEC 61937; used for multi-channel transmission in future; signal block structure; error correction; frequency range: 3 MHz to 6 MHz; channel coding; low sp
40、urious (band-pass filter). This standard gives the detailed specifications of the digital audio signal transmission. Infrared digital audio signal transmission is used in a frequency range of 3 MHz to 6 MHz as specified in IEC 61603-2. It shares this range with analogue audio applications, so that c
41、are should be taken to avoid interference with any such applications being used simultaneously. Page7 EN6160381:2004This system supports a full-band mode that carries all the data on the IEC 60958 interface at sample rates of 48 kHz and below. It also supports a half-band mode carrying two streams e
42、ach of two 16-bit audio channels without the capacity for all the associated validity data, user data, or channel status data defined in IEC 60958. Some of those data are carried elsewhere in the system. Depending on the applicable bit rate, two different channel bandwidths are possible. One is call
43、ed the full-band mode, which carries 2 channels, 32-slot bit stream with the bandwidth of 3 MHz wide, the other is called the half-band mode, which carries 2 channels, 16-slot bit stream with the bandwidth of 1,5 MHz wide. Both the full-band mode and half-band mode are based on IEC 60958-1, IEC 6095
44、8-3, IEC 60958-4 and IEC 61937. The system concept is shown in Figure 1. Digital audio equipmentTransmitter Infrared radiator Infrared Infrared detectorReceiver Digital audio equipment IEC 2495/03Figure 1 System concept 4.2 Area of application This digital audio signal transmission system using infr
45、ared radiation is mainly used for transmitting digital audio signals from a CD player, DAT player or MD player, etc. to headphones, speakers and infrared receivers, etc. 4.3 Band allocation In IEC 61603-2, the band allocation for high quality audio transmission ranges from 2 MHz to 6 MHz is as shown
46、 in Figure 2. Page8 EN6160381:2004 Remotecontrol High speed remote controlsystem system / Data transmission0, 04 0,1 1 2 6 10 30 MHz Sub-carrierAudio transmission / Conference High-fidelity Video transmissionsystems (analogue and digital) audio transmission IEC 2496/03Figure 2 IEC 61603 band allocat
47、ion There are 8 channels in this band, named H1 through H8, for analogue audio signals, as defined in Table 1. In general, wireless loudspeaker or wireless headphone systems use H1 and H2 for left and right channels, so this format for digital audio uses channel allocation from H3 to H8. Table 1 Ana
48、logue audio channel allocation Name Sub-carrier H1 H2 H3 H4 H5 H6 H7 H8 2,3 MHz 2,8 MHz 3,2 MHz 3,7 MHz 4,3 MHz 4,8 MHz 5,2 MHz 5,7 MHz Figure 3 shows the channel allocation for this digital audio format together with analogue channel allocation. High-fidelity audio transmission Digital audio transmission 23456 M H z Sub-carrier H1 H2 H3 H4 H5 H6 H7 H8 IEC 2497/03Figure 3 Band allocation Page9 EN6160381:2004 5 General characteristics 5.1 Environment conditions for operation The environmental conditions for the equipmen
