SIST EN 60908:2000

SLOVENSKI STANDARD
SIST EN 60908:2000
01-april-2000
Audio recording - Compact disc digital audio system (IEC 60908:1999)
Audio recording - Compact disc digital audio system
Tonaufzeichnung - Digital-Audio-System Compact Disc
Enregistrement audio - Système audionumérique à disque compact
Ta slovenski standard je istoveten z: EN 60908:1999
ICS:
33.160.30 Avdio sistemi Audio systems
SIST EN 60908:2000 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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NORME
CEI
INTERNATIONALE
IEC
60908
INTERNATIONAL
Deuxième édition
STANDARD
Second edition
1999-02
Enregistrement audio –
Système audionumérique à disque compact
Audio recording –
Compact disc digital audio system
 IEC 1999 Droits de reproduction réservés  Copyright - all rights reserved
Aucune partie de cette publication ne peut être reproduite ni No part of this publication may be reproduced or utilized in
utilisée sous quelque forme que ce soit et par aucun any form or by any means, electronic or mechanical,
procédé, électronique ou mécanique, y compris la photo- including photocopying and microfilm, without permission in
copie et les microfilms, sans l'accord écrit de l'éditeur. writing from the publisher.
International Electrotechnical Commission 3, rue de Varembé Geneva, Switzerland
Telefax: +41 22 919 0300 e-mail: inmail@iec.ch IEC web site http://www.iec.ch
CODE PRIX
Commission Electrotechnique Internationale
PRICE CODE XD
International Electrotechnical Commission
Pour prix, voir catalogue en vigueur
For price, see current catalogue

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60908  IEC:1999 – 3 –
CONTENTS
Page
FOREWORD .11
Clause
1 Scope and object . 13
2 Normative references . 13
3 Description of system . 15
4 Requirements for measurements. 15
4.1 Conditions of measurement. 15
4.2 Requirements for the measuring pick-up . 15
4.3 Requirements for the clamping of the disc . 17
5 Mechanical parameters . 17
5.1 Outer dimensions of disc. 17
5.2 Centre hole dimensions. 17
5.3 Thickness of disc . 17
5.4 Labelling . 17
5.5 Reference plane. 17
5.6 Clamping area. 17
5.7 Mass of disc. 19
5.8 Limits for the deflections of the read-out side of the disc. 19
6 Optical parameters. 19
6.1 Thickness of transparent substrate. 19
6.2 Refractive index . 19
6.3 Limits for the angular deviation of the reflected beam (α). 19
6.4 Birefringence of transparent substrate . 19
6.5 Reflectivity . 19
6.6 Limits for reflectivity variation in program area. 19
7 Recording parameters . 19
7.1 Rotation during playback . 19
7.2 Track . 19
7.3 Limits for deviations of information layer perpendicular to reference plane . 21
7.4 Limits for radial deviations of the track . 21
8 Environmental conditions for playing the compact disc. 21
8.1 Playing the compact disc. 21
8.2 Temperature and humidity requirements. 21
9 High-frequency signal. 23
9.1 Measurement conditions . 23
9.2 Modulation amplitude . 23
9.3 Signal asymmetry. 23
9.4 Cross-talk . 23
9.5 Frequency modulation of the channel bit frequency (see clause 13) . 23
10 Radial differential (RD) signal. 25
10.1 Measurement conditions . 25
10.2 Shape of the radial differential signal. 25
10.3 Sensitivity to radial offset . 25
10.4 Noise . 25

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60908  IEC:1999 – 5 –
Clause Page
11 Defects . 27
11.1 Block error rate (BLER) . 27
11.2 Local defects . 27
12 General – Recorded parameters. 27
13 Eight to 14 modulation code (EFM-code) . 29
14 Frame format . 31
15 EFM-modulator . 31
16 Error correction .31
16.1 General. 31
16.2 Structure. 33
16.3 CIRC encoder and decoder . 33
17 Subcode/control and display system . 33
17.1 General. 33
17.2 Data format. 35
17.3 Subcode structure. 35
17.4 Channel P. 35
17.5 Channel Q. 37
17.6 Channels R to W inclusive. 45
18 General. 45
19 General data organization . 45
19.1 Basic format. 45
19.2 PACK format. 47
19.3 Error correction parity P . 47
19.4 Interleaving . 49
19.5 P-parity encoder and interleave sequence . 49
19.6 P-parity decoder and de-interleave sequence . 49
19.7 Error-correction parity Q. 49
19.8 Q-parity encoder . 51
19.9 Q-parity decoder . 51
20 ZERO mode (MODE = 0, ITEM = 0). 51
20.1 General. 51
20.2 ZERO mode PACK format . 51
21 LINE GRAPHICS mode (MODE = 1, ITEM = 0) . 53
21.1 General. 53
21.2 LINE-GRAPHICS mode PACK format . 53
21.3 LINE-GRAPHICS mode FONT format . 55
21.4 LINE-GRAPHICS mode SCREEN format . 55
21.5 LINE-GRAPHICS mode colour table . 57
21.6 LINE-GRAPHICS mode instructions . 57
22 TV-GRAPHICS mode (MODE = 1, ITEM = 1) . 61
22.1 General. 61
22.2 TV-GRAPHICS mode PACK format . 61
22.3 TV-GRAPHICS mode FONT format . 63
22.4 TV-GRAPHICS mode SCREEN format . 63
22.5 TV-GRAPHICS mode instructions. 65

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60908  IEC:1999 – 7 –
Clause Page
23 EXTENDED TV-GRAPHICS mode (MODE = 1, ITEM = 1 & 2). 77
23.1 General. 77
23.2 EXTENDED TV-GRAPHICS mode PACK format. 79
23.3 EXTENDED TV-GRAPHICS mode FONT format. 79
23.4 EXTENDED TV-GRAPHICS mode SCREEN and MEMORY formats. 79
23.5 EXTENDED TV-GRAPHICS mode instructions . 81
24 MIDI mode (MODE = 3, ITEM = 0) . 91
24.1 General. 91
24.2 MIDI mode PACK format . 93
25 USER mode (MODE = 7, ITEM = 0). 93
25.1 General. 93
25.2 USER mode PACK format . 95
26 CD TEXT mode (MODE = 2, ITEM = 1, 2, 3, 5, 6, 7 or MODE = 4) . 95
26.1 General. 95
26.2 CD TEXT mode for the lead-in area (MODE = 4) . 97
26.3 CD TEXT mode for the program area (MODE = 2) .113
26.4 Mandatory, recommended and optional items .125
26.5 Repetition rate and skew .129
Annexes
Annex A (informative) Examples of the combination of the EFM-code with 3 extra channel
bits. .185
Annex B (normative) Abbreviations .189
Annex C (informative) Recommendations .191
Annex D (informative) Aperture specification for 8 cm – CD .193
Annex E (informative) TV-GRAPHICS mode implementation aspects .195
Annex F (informative) EXTENDED TV-GRAPHICS mode implementation aspects .197
Bibliography . .209
Figures
Figure 1 – Pre-emphasis characteristic .131
Figure 2 – Overall disc layout.13 5
Figure 3 – HF signal . .137
Figure 4 – Typical shape of the RD signal used for tracking versus radial spot position .139
Figure 5 – Transfer function.13 9
Figure 6 – Eight to 14 modulation code (EFM code) .141
Figure 7 – EFM conversion table.145
Figure 8 – Frame format .14 7
Figure 9 – Block structure.1 49
Figure 10 – Column vectors .151
Figure 11 – Parity check matrices .153
Figure 12 – CIRC encoder .155

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60908  IEC:1999 – 9 –
Page
Figure 13 – CIRC decoder .157
Figure 14 – Example of encoding in channels P and Q .159
Figure 15 – Example of encoding of table of contents with six tracks (program items) .161
Figure 16 – Angular deviation .163
Figure 17 – Operating conditions of disc .165
Figure 18 – Time error versus modulation frequency.167
Figure 19 – Basic format subcode channels R to W .169
Figure 20 – General organization of a PACK .171
Figure 21 – P-parity and interleave sequence.173
Figure 22 – P-parity and de-interleave sequence.175
Figure 23 – Q-parity encoder .177
Figure 24 – Q-parity decoder .179
Figure 25 – Block diagram of a video/graphics mixing unit.181
Figure 26 – Example of encoding 3 bytes in 4 SYMBOLS .181
Figure 27 – Text group and BLOCK structure.181
Figure 28 – CD TEXT mode PACK format for the lead-in area.181
Figure 29 – CD TEXT mode PACK format for the program area .183
Figure 30 – Example of partial interleaving of PACKS .183
Figure 31 – Maximum allowed mode transition skew .183
Figure D.1 – Adaptor including disc.193
Figure F.1 – Memory organization of EXTENDED TV-GRAPHICS .203
Figure F.2 – CLUT structure of EXTENDED TV-GRAPHICS .205
Figure F.3 – Relationship of colours between TV-GRAPHICS and
EXTENDED TV-GRAPHICS.207

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60908  IEC:1999 – 11 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
–––––––––––––
AUDIO RECORDING –
COMPACT DISC DIGITAL AUDIO SYSTEM –
FOREWORD
1) The IEC (International Electrotechnical Commission) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of the 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, the IEC publishes International Standards. Their preparation is
entrusted to technical committees; any IEC National Committee interested in the subject dealt with may
participate in this preparatory work. International, governmental and non-governmental organizations liaising
with the IEC also participate in this preparation. The IEC collaborates closely with the International Organization
for Standardization (ISO) in accordance with conditions determined by agreement between the two
organizations.
2) The formal decisions or agreements of the IEC on technical matters express, as nearly as possible, an
international consensus of opinion on the relevant subjects since each technical committee has representation
from all interested National Committees.
3) The documents produced have the form of recommendations for international use and are published in the form
of standards, technical reports or guides and they are accepted by the National Committees in that sense.
4) In order to promote international unification, IEC National Committees undertake to apply IEC International
Standards transparently to the maximum extent possible in their national and regional standards. Any
divergence between the IEC Standard and the corresponding national or regional standard shall be clearly
indicated in the latter.
5) The IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any
equipment declared to be in conformity with one of its standards.
6) Attention is drawn to the possibility that some of the elements of this International Standard may be the subject
of patent rights. The IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 60908 has been prepared by subcommittee 100B: Audio, video and
multimedia information storage systems, of IEC technical committee 100: Audio, video and
multimedia systems and equipments.
This second edition cancels and replaces the first edition published in 1987, amendment 1
(1992) and the corrigendum to amendment 1.
The text of this standard is based on the first edition, amendment 1, the corrigendum to
amendment 1 and the following documents:
FDIS Report on voting
100B/173/FDIS 100B/185/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.
Annex B forms an integral part of this international Standard.
Annexes A, C, D, E and F are for information only.

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60908  IEC:1999 – 13 –
AUDIO RECORDING –
COMPACT DISC DIGITAL AUDIO SYSTEM –
1 Scope and object
This standard is applicable to a prerecorded optical reflective digital audio disc system.
This standard defines those parameters of compact disc that affect interchangeability between
discs and players. It is also intended as a reference for manufacturers wishing to produce discs
and/or players that conform to the system described in this standard. It deals with discs of
80 mm in diameter as well as those of 120 mm in diameter.
2 Normative references
The following normative documents contain provisions which, through reference in this text,
constitute provisions of this International Standard. For dated references, subsequent
amendments to, or revisions of, any of these publications do not apply. However, parties to
agreements based on this International Standard are encouraged to investigate the possibility
of applying the most recent editions of the normative documents indicated below. For undated
references, the latest edition of the normative document referred to applies. Members of IEC
and ISO maintain registers of currently valid International Standards.
IEC 60068-2-2:1974, Environmental testing – Part 2: Tests – Tests B: Dry heat
IEC 60068-2-30:1980, Environmental testing – Part 2: Tests – Test Db and guidance: Damp
heat, cyclic (12 + 12-hour cycle)
IEC 60721-3-5:1997, Classification of environmental conditions – Part 3: Classification of groups
of environmental parameters and their severities – Section 5: Ground vehicle installations
IEC 61104:1992, Compact disc video system – 12 cm CD-V
IEC 61866:1997, Audiovisual systems – Interactive text transmission system (ITTS)
IEC 61938:1996, Audio, video and audiovisual systems – Interconnections and matching
values – Preferred matching values of analogue signals
ISO/IEC 646:1991, Information technology – ISO 7-bit coded character set for information
interchange
ISO 3901:1986, Documentation – International Standard Recording Code (ISRC)
ISO/IEC 8859-1:1998, Information technology – 8-bit single-byte coded graphic character sets –
Part 1: Latin alphabet No.1
EBU Tech 3258-E:1991, Specification of the systems of the MAC/packet family
UPC/EAN, Universal product code/International article numbering association
RIAJ Document RS506, Music shift Kanji character set
CD EXTRA, Enhanced music CD specification, Version 1.0, December 1995, Sony/Philips

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60908  IEC:1999 – 15 –
3 Description of system
The information carrier is a transparent disc, the substrate, one side of which carries the
information. This side, the encoded side, is covered in turn by a reflective and a protective
layer.
The information of the disc is stored in a spiral-shaped track consisting of successive shallow
depressions (pits). When the disc is playing and viewed from the read-out side, the spiral starts
near the centre of the disc and finishes near its edge.
The lengths of the pits and the spaces between them can take discrete values only, and
represent the encoded two-channel audio information.
The information is read out by means of a beam of light which passes through the plain, i.e. the
non-encoded side of the transparent disc to the encoded side, where it is reflected and
modulated by the recorded information (see figure 2b, detail B).
The information is followed by means of a servo-system for tracking and focusing.
4 Requirements for measurements
4.1 Conditions of measurement
Measurements and mechanical checks shall be carried out within the following limits unless
otherwise specified:
– ambient temperature: 15 °C to 35 °C;
– relative humidity: 45 % to 75 %;
– air pressure: 86 kPa to 106 kPa.
4.2 Requirements for the measuring pick-up
The optical pick-up to be used for disc measurement shall comply with the following
requirements:
– wavelength: 780 ± 10 nm;
– polarization: circular;
– numerical aperture (NA): 0,45 ± 0,01;
– intensity at the rim of the pupil > 50 % of the maximum intensity value;
of the objective lens:
– diffraction limited performance within the Maréchal criterion, preferably
of the optical system: equally divided between disc and player.

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60908  IEC:1999 – 17 –
4.3 Requirements for the clamping of the disc
The disc shall be fixed between two equally sized concentric rings, having inner diameters
of 29 mm and outer diameters of 31 mm, the clamping force being between 1 N and 2 N (see
figure 2b).
Methods and/or conditions
Parameters to be specified Requirements
of measurement
5 Mechanical parameters
Figures 2a, 2b and 2c,
specify the dimensions of the disc,
including reflective layer, protective
layer and label
5.1 Outer dimensions
of disc
5.1.1 Outer diameter 120 ± 0,3 mm To be measured at 23 ± 2 °C and
 80 ± 0,2 mm (50 ± 5) % relative humidity
5.1.2 Radial run-out of outer edge 0,4 mm max. Relative to the inscribed circle
of centre hole
5.1.3 Edge shape Edges shall be free from burrs;
chamfer or radius is permitted on
both sides
5.2
Centre hole dimensions For 8 cm-CD, see figures 2c and 2d.
5.2.1 Diameter To be measured at 23 ± 2 °C and
+0,1
15 mm
 0 (50 ± 5) % relative humidity
5.2.2 Shape Cylindrical
5.2.3 Edge shape Burrs are permitted on the label side,
but not on the read-out side. Chamfer
or radius is permitted (see figure 2b,
detail C)
5.3
Thickness of disc 0,3 Including protective layer and labelling
+
1,2 mm
0,1
−
5.4
Labelling
5.4.1 Label dimensions Shall not project over edge of centre May be applied by printing or
hole or outer edge of disc by means of a label
5.4.2 Label information At least the following information
shall be given:
a) Title of program
b) Catalogue number of disc
c) Sequence number of and total
number of discs if complete
program occupies more than
one disc (e.g.: disc 2 of 4)
5.5
Reference plane Ring between diameters of 26 mm On the read-out side
and 33 mm (see figures 2a and 2b)
5.6
Clamping area
5.6.1 Inner diameter of 26 mm max.*
clamping area
5.6.2 Outer diameter of 33 mm min.*
clamping area
5.6.3 Thickness of disc in Within the requirements given in 5.3
clamping area and figure 2b
5.6.4 Adaptor clamping area An outer ring with 1,5 mm in width
for 8 cm-CD
5.6.5 Thickness in clamping 1,2 ± 0,1 mm
area for 8 cm-CD
adaptor
* These dimensions ensure that the ring between 26 mm and 33 mm is available for clamping.

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60908  IEC:1999 – 19 –
Methods and/or conditions
Parameters to be specified Requirements
of measurement
5.7 14 g to 33 g
Mass of disc
 6 g to 16 g for 8 cm-CD
Within the information area (45 mm
5.8
Limits for the deflec-
to 118 mm maximum diameter)
tions of the read-out
(see figure 2c)
side of the disc
5.8.1 Peak deflection ±0,4 mm
±0,3 mm for 8 cm-CD
5.8.2 Deflection averaged over ±0,3 mm
one revolution ±0,2 mm for 8 cm-CD
5.8.3 ±0,6° See figure 16.
Angular deviation (β)
6 Optical parameters
6.1 Thickness of trans- 1,2 ± 0,1 mm Within the information area
(see figures 2a, 2b and 2c).
p
...