Transmission of audio and/or video and related signals using infrared radiation - Part 8-1: Digital audio and related signals

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 describes systems with different economic uses of the available bandwidth in order to obtain minimum interference and maximum compatibility.

Übertragung von Ton- und/oder Bildsignalen und verwandten Signalen mit Infrarotstrahlung - Teil 8-1: Digitale Audiosignale und zugeordnete Signale

Transmission de signaux audio et/ou vidéo et de signaux similaires au moyen de rayonnement infrarouge - Partie 8-1: Signaux audio numérique et similaires

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 describes systems with different economic uses of the available bandwidth in order to obtain minimum interference and maximum compatibility.

Prenos avdio oziroma video in sorodnih signalov z infrardečim sevanjem - 8-1. del: Digitalni avdio signali in pripadajoči signali (IEC 61603-8-1:2003)

General Information

Status
Published
Publication Date
15-Apr-2004
Current Stage
6060 - Document made available
Start Date
16-Apr-2004
Completion Date
16-Apr-2004

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Standards Content (sample)

SLOVENSKI STANDARD
SIST EN 61603-8-1:2004
01-september-2004

3UHQRVDYGLRR]LURPDYLGHRLQVRURGQLKVLJQDORY]LQIUDUGHþLPVHYDQMHPGHO

'LJLWDOQLDYGLRVLJQDOLLQSULSDGDMRþLVLJQDOL ,(&

Transmission of audio and/or video and related signals using infrared radiation -- Part 8-

1: Digital audio and related signals
Übertragung von Ton- und/oder Bildsignalen und verwandten Signalen mit
Infrarotstrahlung -- Teil 8-1: Digitale Audiosignale und zugeordnete Signale
Transmission de signaux audio et/ou vidéo et de signaux similaires au moyen de
rayonnement infrarouge -- Partie 8-1 : Signaux audio numérique et similaires
Ta slovenski standard je istoveten z: EN 61603-8-1:2004
ICS:
33.160.99 Druga avdio, video in Other audio, video and
avdiovizuelna oprema audiovisual equipment
SIST EN 61603-8-1:2004 en

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
SIST EN 61603-8-1:2004
---------------------- Page: 2 ----------------------
SIST EN 61603-8-1:2004
EUROPEAN STANDARD EN 61603-8-1
NORME EUROPÉENNE
EUROPÄISCHE NORM April 2004
ICS 33.160.99; 33.040.20 Partly supersedes EN 61603-2:1997
English 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)
Transmission de signaux audio Übertragung von Ton- und/oder
et/ou vidéo et de signaux similaires Bildsignalen und verwandten Signalen
au moyen de rayonnement infrarouge mit Infrarotstrahlung
Partie 8-1 : Signaux audio numérique Teil 8-1: Digitale Audiosignale
et similaires und zugeordnete Signale
(CEI 61603-8-1:2003) (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-date 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 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, Greece, Hungary, Iceland, Ireland, Italy, Latvia,

Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden,

Switzerland and United Kingdom.
CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
Central Secretariat: rue de Stassart 35, B - 1050 Brussels

© 2004 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.

Ref. No. EN 61603-8-1:2004 E
---------------------- Page: 3 ----------------------
SIST EN 61603-8-1:2004
EN 61603-8-1:2004 - 2 -
Foreword

The text of document 100/628/FDIS, future edition 1 of IEC 61603-8-1, 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 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 national 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 IEC 61603-8-1:2003 was approved by CENELEC as a European

Standard without any modification.
__________
---------------------- Page: 4 ----------------------
SIST EN 61603-8-1:2004
- 3 - EN 61603-8-1:2004
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications

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.

NOTE Where an international publication has been modified by common modifications, indicated by (mod), the relevant

EN/HD applies.
Publication Year Title EN/HD Year
1) 2)
IEC 60958-1 - Digital audio interface EN 60958-1 -
Part 1: General
1) 3)
IEC 60958-3 - Part 3: Consumer applications EN 60958-3 2003
1) 3)
IEC 60958-4 - Part 4: Professional applications (TA4) EN 60958-4 2003
IEC 61603-1 1997 Transmission of audio and/or video and EN 61603-1 1997
+ corr. May 1997 related signals using infra-red radiation
Part 1: General
IEC 61603-2 1997 Part 2: Transmission systems for audio EN 61603-2 1997
wide band and related signals
IEC 61937 2000 Digital audio - Interface for non-linear EN 61937 2000
PCM encoded audio bitstreams applying
IEC 60958
1) 3)
IEC 61938 - Audio, video and audiovisual systems - EN 61938 1997
Interconnections and matching values - + corr. February 1997
Preferred matching values of analogue
signals
Undated reference.
To be published.
Valid edition at date of issue.
---------------------- Page: 5 ----------------------
SIST EN 61603-8-1:2004
---------------------- Page: 6 ----------------------
SIST EN 61603-8-1:2004
INTERNATIONAL IEC
STANDARD 61603-8-1
First edition
2003-11
Transmission of audio and/or video and
related signals using infrared radiation –
Part 8-1:
Digital audio and related signals
© IEC 2003 ⎯ Copyright - all rights reserved

No part of this publication may be reproduced or utilized in any form or by any means, electronic or

mechanical, including photocopying and microfilm, without permission in writing from the publisher.

International Electrotechnical Commission, 3, rue de Varembé, PO Box 131, CH-1211 Geneva 20, Switzerland

Telephone: +41 22 919 02 11 Telefax: +41 22 919 03 00 E-mail: inmail@iec.ch Web: www.iec.ch

PRICE CODE
Commission Electrotechnique Internationale X
International Electrotechnical Commission
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For price, see current catalogue
---------------------- Page: 7 ----------------------
SIST EN 61603-8-1:2004
– 2 – 61603-8-1 © IEC:2003(E)
CONTENTS

FOREWORD .......................................................................................................................... 5

1 Scope .............................................................................................................................. 7

2 Normative references....................................................................................................... 7

3 Terms, definitions and abbreviations................................................................................ 7

4 System description .......................................................................................................... 8

4.1 General .................................................................................................................. 8

4.2 Area of application.................................................................................................. 9

4.3 Band allocation....................................................................................................... 9

5 General characteristics ...................................................................................................11

5.1 Environment conditions for operation.....................................................................11

5.2 Partition of functions between elements of the systems .........................................11

6 Specific requirements .....................................................................................................11

6.1 Block diagram........................................................................................................11

6.2 Input and output ....................................................................................................12

6.3 Carrier ...................................................................................................................12

6.4 Sub-carrier ............................................................................................................12

6.5 Channel allocation .................................................................................................12

6.6 Block structure.......................................................................................................14

6.7 Source stream .......................................................................................................14

6.8 Transmission stream .............................................................................................19

6.9 Modulation.............................................................................................................20

7 Characteristics and measurements .................................................................................26

7.1 Test conditions ......................................................................................................26

7.2 Location.................................................................................................................26

7.3 Transmitting distance and directivity......................................................................26

7.4 Spurious level........................................................................................................28

7.5 Accuracy of transmission-check frequency.............................................................28

8 Marking and contents of specifications............................................................................28

8.1 Marking .................................................................................................................28

8.2 Contents of specifications......................................................................................28

Annex A (normative) Application of the transmission systems for digital audio and

related signals using infrared radiation in the consumer audio mode .....................................33

Annex B (normative) Application of the transmission systems for digital audio and

related signals using infrared radiation in the professional audio mode .................................42

---------------------- Page: 8 ----------------------
SIST EN 61603-8-1:2004
61603-8-1 © IEC:2003(E) – 3 –

Figure 1 – System concept..................................................................................................... 9

Figure 2 – IEC 61603 band allocation....................................................................................10

Figure 3 – Band allocation.....................................................................................................10

Figure 4 – Transmitter...........................................................................................................11

Figure 5 – Channel-coding block ...........................................................................................12

Figure 6 – Channel allocation................................................................................................13

Figure 7 – Block structure .....................................................................................................14

Figure 8 – Source stream......................................................................................................15

Figure 9 – Source_block stream............................................................................................15

Figure 10 – Source_info stream ............................................................................................16

Figure 11 – Block alignment ..................................................................................................17

Figure 12 – Parity check matrix .............................................................................................18

Figure 13 – Error correction code block.................................................................................18

Figure 14 – Transmission stream ..........................................................................................19

Figure 15 – The order bytes in Tr_section .............................................................................20

Figure 16 – Modulation block ................................................................................................21

Figure 17 – Byte to symbol conversion..................................................................................21

Figure 18 – XOR gates..........................................................................................................22

Figure 19 – Scramble pattern generator ................................................................................22

Figure 20 – QPSK mapping...................................................................................................23

Figure 21 – Baseband filter characteristics............................................................................24

Figure 22 – Transmission chain.............................................................................................29

Figure 23 – Location for measurements ................................................................................29

Figure 24 – Transmitting distance .........................................................................................29

Figure 25 – Angle of half optical radiant intensity ..................................................................29

Figure 26 – Optical axis of the transmitter .............................................................................30

Figure 27 – Optical axis of the receiver .................................................................................30

Figure 28 – Characteristics of the transmitter ........................................................................30

Figure 29 – Directivity characteristics of the transmitter ........................................................31

Figure 30 – Characteristics of the receiver ............................................................................31

Figure 31 – Directivity characteristics of the receiver.............................................................32

Figure 32 – Measuring system for spurious emission ............................................................32

Figure A.1 – Source_info structure ........................................................................................33

Figure A.2 – crc_area............................................................................................................38

Figure A.3 – Linear feedback shift register circuit..................................................................38

Figure A.4 – Sub-frame structure of full-band mode ..............................................................39

Figure A.5 – Sub-frame structure of half-band mode .............................................................41

Figure B.1 – Source_info structure ........................................................................................42

Figure B.2 – CRC area..........................................................................................................46

Figure B.3 – Linear feedback shift register circuit..................................................................47

Figure B.4 – Sub-frame structure of full-band mode ..............................................................47

Figure B.5 – Sub-frame structure of half-band mode .............................................................50

---------------------- Page: 9 ----------------------
SIST EN 61603-8-1:2004
– 4 – 61603-8-1 © IEC:2003(E)

Table 1 – Analogue audio channel allocation.........................................................................10

Table 2 – Sub-carrier frequency ............................................................................................12

Table 3 – Maximum source stream bit rate ............................................................................13

Table 4 – Bit rate of digital audio...........................................................................................13

Table 5 – Byte values in a transmission_info........................................................................16

Table 6 – Reed-Solomon code parameter .............................................................................17

Table 7 – Header bit field ......................................................................................................20

Table 8 – Marking and contents of specifications ..................................................................28

Table A.1 – crc_flag ..............................................................................................................35

Table A.2 – Valid_flag ...........................................................................................................35

Table A.3 – Data_type...........................................................................................................35

Table A.4 ..............................................................................................................................36

Table A.5 – Mode_extension_code........................................................................................36

Table A.6 – pro_flag..............................................................................................................36

Table A.7 – pcm_id ...............................................................................................................36

Table A.8 – Copyright_flag....................................................................................................37

Table A.9 – Emphasis ...........................................................................................................37

Table A.10 – fs_code ............................................................................................................37

Table A.11 – Mode_extension_code......................................................................................40

Table B.1 – Crc_flag .............................................................................................................44

Table B.2 – Valid_flag ...........................................................................................................44

Table B.3 – Data_type...........................................................................................................44

Table B.4 – Coding_mode .....................................................................................................44

Table B.5 – Mode_extension_code........................................................................................45

Table B.6 – pro_flag..............................................................................................................45

Table B.7 – pcm_id ...............................................................................................................45

Table B.8 – Emphasis ...........................................................................................................45

Table B.9 – fs_code ..............................................................................................................46

Table B.10 – Mode_extension_code......................................................................................49

---------------------- Page: 10 ----------------------
SIST EN 61603-8-1:2004
61603-8-1 © IEC:2003(E) – 5 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
TRANSMISSION OF AUDIO AND/OR VIDEO AND RELATED SIGNALS
USING INFRARED RADIATION –
Part 8-1: Digital audio and related signals
AVANT-PROPOS

1) La Commission Electrotechnique Internationale (CEI) est une organisation mondiale de normalisation

composée de l'ensemble des comités électrotechniques nationaux (Comités nationaux de la CEI). La CEI a

pour objet de favoriser la coopération internationale pour toutes les questions de normalisation dans les

domaines de l'électricité et de l'électronique. A cet effet, la CEI – entre autres activités – publie des Normes

internationales, des Spécifications techniques, des Rapports techniques, des Spécifications accessibles au

public (PAS) et des Guides (ci-après dénommés "Publication(s) de la CEI"). Leur élaboration est confiée à des

comités d'études, aux travaux desquels tout Comité national intéressé par le sujet traité peut participer. Les

organisations internationales, gouvernementales et non gouvernementales, en liaison avec la CEI, participent

également aux travaux. La CEI collabore étroitement avec l'Organisation Internationale de Normalisation (ISO),

selon des conditions fixées par accord entre les deux organisations.

2) Les décisions ou accords officiels de la CEI concernant les questions techniques représentent, dans la mesure

du possible, un accord international sur les sujets étudiés, étant donné que les Comités nationaux de la CEI

intéressés sont représentés dans chaque comité d’études.

3) Les Publications de la CEI se présentent sous la forme de recommandations internationales et sont agréées

comme telles par les Comités nationaux de la CEI. Tous les efforts raisonnables sont entrepris afin que la CEI

s'assure de l'exactitude du contenu technique de ses publications; la CEI ne peut pas être tenue responsable

de l'éventuelle mauvaise utilisation ou interprétation qui en est faite par un quelconque utilisateur final.

4) Dans le but d'encourager l'uniformité internationale, les Comités nationaux de la CEI s'engagent, dans toute la

mesure possible, à appliquer de façon transparente les Publications de la CEI dans leurs publications

nationales et régionales. Toutes divergences entre toutes Publications de la CEI et toutes publications

nationales ou régionales correspondantes doivent être indiquées en termes clairs dans ces dernières.

5) La CEI n’a prévu aucune procédure de marquage valant indication d’approbation et n'engage pas sa

responsabilité pour les équipements déclarés conformes à une de ses Publications.

6) Tous les utilisateurs doivent s'assurer qu'ils sont en possession de la dernière édition de cette publication.

7) Aucune responsabilité ne doit être imputée à la CEI, à ses administrateurs, employés, auxiliaires ou

mandataires, y compris ses experts particuliers et les membres de ses comités d'études et des Comités

nationaux de la CEI, pour tout préjudice causé en cas de dommages corporels et matériels, ou de tout autre

dommage de quelque nature que ce soit, directe ou indirecte, ou pour supporter les coûts (y compris les frais

de justice) et les dépenses découlant de la publication ou de l'utilisation de cette Publication de la CEI ou de

toute autre Publication de la CEI, ou au crédit qui lui est accordé.

8) L'attention est attirée sur les références normatives citées dans cette publication. L'utilisation de publications

référencées est obligatoire pour une application correcte de la présente publication.

9) L’attention est attirée sur le fait que certains des éléments de la présente Publication de la CEI peuvent faire

l’objet de droits de propriété intellectuelle ou de droits analogues. La CEI ne saurait être tenue pour

responsable de ne pas avoir identifié de tels droits de propriété et de ne pas avoir signalé leur existence.

International Standard IEC 61603-8-1 has been prepared by technical area 3, Infrared

systems and applications, of IEC technical committee 100: Audio, video and multimedia

systems and equipment.
This part of IEC 61603 replaces 6.8.3 of IEC 61603-2.
The text of this standard is based on the following documents:
FDIS Report on voting
100/628/FDIS 100/706/RVD

Full information on the voting for the approval of this standard can be found in the report on

voting indicated in the above table.
---------------------- Page: 11 ----------------------
SIST EN 61603-8-1:2004
– 6 – 61603-8-1 © IEC:2003(E)

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

The committee has decided that the contents of this publication will remain unchanged until

2005. At this date, the publication will be
• reconfirmed;
• withdrawn;
• replaced by a revised edition, or
• amended.
---------------------- Page: 12 ----------------------
SIST EN 61603-8-1:2004
61603-8-1 © IEC:2003(E) – 7 –
TRANSMISSION OF AUDIO AND/OR VIDEO RELATED 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 describes 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. 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

IEC 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, Digital 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 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
---------------------- Page: 13 ----------------------
SIST EN 61603-8-1:2004
– 8 – 61603-8-1 © IEC:2003(E)
3.1.3
Tr_section
interleaved 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 encoded 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 an 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 this 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 spurious (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 care

should be taken to avoid interference with any such applications being used simultaneously.

---------------------- Page: 14 ----------------------
SIST EN 61603-8-1:2004
61603-8-1 © IEC:2003(E) – 9 –

This 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

each 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

called 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 60958-3,

IEC 60958-4 and IEC 61937.
The system concept is shown in Figure 1.
Digital
audio Transmitter
equipment
Infrared
Infrared
Infrared
radiator detector
Digital
Receiver audio
equipment
IEC 2495/03
Figure 1 – System concept
4.2 Area of application

This digital audio signal transmission system using infrared radiation is mainly used for

transmitting digital audio signals from a CD player, DAT player or MD player, etc. to

hea
...

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