SN EN 60908 : 1999

1 Scope and object
2 Normative references
3 Description of system
4 Requirements of measurements
4.1 Conditions of measurement
4.2 Requirements for the measuring pick-up
4.3 Requirements for the clamping of the disc
5 Mechanical parameters
5.1 Outer dimensions of disc
5.2 Centre hole dimensions
5.3 Thickness of disc
5.4 Labelling
5.5 Reference plane
5.6 Clamping area
5.7 Mass of disc
5.8 Limits for the deflections of the read-out side of the disc
6 Optical parameters
6.1 Thickness of transparent substrate
6.2 Refractive index
6.3 Limits for the angular deviation of the reflected beam (a)
6.4 Birefringence of transparent substrate
6.5 Reflectivity
6.6 Limits of reflectivity variation in program area
7 Recording parameters
7.1 Rotation during playback
7.2 Track
7.3 Limits for deviations of information layer perpendicular to
      reference plane
7.4 Limits for radical deviations of the track
8 Environmental conditions for playing the compact disc
8.1 Playing the compact disc
8.2 Temperature and humidity requirements
9 High-frequency signal
9.1 Measurement conditions
9.2 Modulation amplitude
9.3 Signal asymmetry
9.4 Cross-talk
9.5 Frequency modulation of the channel bit frequency (see clause 13)
10 Radical differential (RD) signal
10.1 Measurement conditions
10.2 Shape of the radial differential signal
10.3 Sensitivity to radial offset
10.4 Noise
11 Defects
11.1 Block error rate (BLER)
11.2 Local defects
12 General - Recorded parameters
13 Eight to 14 modulation code (EFM-code)
14 Frame format
15 EFM-modulator
16 Error correction
16.1 General
16.2 Structure
16.3 CIRC encoder and decoder
17 Subcode/control and display system
17.1 General
17.2 Data format
17.3 Subcode structure
17.4 Channel P
17.5 Channel Q
17.6 Channels R to W inclusive
18 General
19 General data organization
19.1 Basic format
19.2 PACK format
19.3 Error correction parity P
19.4 Interleaving
19.5 P-parity encoder and interleave sequence
19.6 P-parity decoder and de-interleave sequence
19.7 Error-correction parity Q
19.8 Q-parity encoder
19.9 Q-parity decoder
20 ZERO mode (MODE=0, ITEM=0)
20.1 General
20.2 ZERO mode PACK format
21 LINE GRAPHICS mode (MODE=1, ITEM=0)
21.1 General
21.2 LINE-GRAPHICS mode PACK format
21.3 LINE-GRAPHICS mode FONT format
21.4 LINE-GRAPHICS mode SCREEN format
21.5 LINE-GRAPHICS mode colour table
21.6 LINE-GRAPHICS mode instructions
22 TV-GRAPHICS mode (MODE=1, ITEM=1)
22.1 General
22.2 TV-GRAPHICS mode PACK format
22.3 TV-GRAPHICS mode FONT format
22.4 TV-GRAPHICS mode SCREEN format
22.5 TV-GRAPHICS mode instructions
23 EXTENDED TV-GRAPHICS mode (MODE=1, ITEM=1 & 2)
23.1 General
23.2 EXTENDED TV-GRAPHICS mode PACK format
23.3 EXTENDED TV-GRAPHICS mode FONT format
23.4 EXTENDED TV-GRAPHICS mode SCREEN and MEMORY formats
23.5 EXTENDED TV-GRAPHICS mode instructions
24 MIDI mode (MODE=3, ITEM=0)
24.1 General
24.2 MIDI mode PACK format
25 USER mode (MODE=7, ITEM=0)
25.1 General
25.2 USER mode PACK format
26 CD TEXT mode (MODE=2, ITEM=1,2,3,5,6,7 or MODE=4)
26.1 General
26.2 CD TEXT mode for the lead-in area (MODE=4)
26.3 CD TEXT mode for the program area (MODE=2)
26.4 Mandatory, recommended and optical items
26.5 Repetition rate and skew
Annexes
A (informative) Examples of the combination of the EFM-code with
                3 extra channel bits
B (normative) Abbreviations
C (informative) Recommendations
D (informative) Aperture specification or 8 cm - CD
E (informative) TV-GRAPHICS mode implementation aspects
F (informative) EXTENDED TV-GRAPHICS mode implementation aspects
Annex ZA Normative references to international publications with their
         corresponding European publications
Bibliography
Figures
1 - Pre-emphasis characteristics
2 - Overall disc layout
3 - HF signal
4 - Typical shape of the RD signal used for tracking versus radial
     spot position
5 - Transfer function
6 - Eight to 14 modulation code (EFM code)
7 - EFM conversion table
8 - Frame format
9 - Block structure
10 - Column vectors
11 - Parity check matrices
12 - CIRC encoder
13 - CIRC decoder
14 - Example of encoding in channels P and Q
15 - Example of encoding of table of contents with six tracks
     (program items)
16 - Angular deviation
17 - Operating conditions of disc
18 - Time error versus modulation frequency
19 - Basic format subcode channels R to W
20 - General organization of a PACK
21 - P-parity and interleave sequence
22 - P-parity and de-interleave sequence
23 - Q-parity encoder
24 - Q-parity decoder
25 - Block diagram of a video/graphics mixing unit
26 - Example of encoding 3 bytes in 4 SYMBOLS
27 - Text group and BLOCK structure
28 - CD TEXT mode PACK format for the lead-in area
29 - CD TEXT mode PACK format for the program area
30 - Example of partial interleaving of PACKS
31 - Maximum allowed mode transition skew
D.1 - Adaptor including disc
F.1 - Memory organization of EXTENDED TV-GRAPHICS
F.2 - CLUT structure of EXTENDED TV-GRAPHICS
F.3 - Relationship of colours between TV-GRAPHICS and EXTENDED
      TV-GRAPHICS

Applicable to a prerecorded optical reflective digital audio disc system. Describes those parameters of compact disc that affect interchangeability between discs and players. Intended as a reference for manufacturers wishing to produce discs and/or players that conform to the system described in this standard. Deals with discs of 80 mm in diameter as well as those of 120 mm in diameter.