SIST EN 60856:1999/A2:1999

SLOVENSKI STANDARD
01-april-1999
Laser vision 50Hz/625 lines PAL - Amendment A2 (IEC 60856:1986/A2:1997)
Pre-recorded optical reflective videodisk system Laser vision 50 Hz/625 lines - PAL
System für bespielte, optisch reflektierende Videoplatten Laser-Vision 50 Hz/625 Zeilen
- PAL
Système de vidéodisque optique réfléchissant préenregistré Laser vision 50 Hz/625
lignes - PAL
Ta slovenski standard je istoveten z: EN 60856:1993/A2:1997
ICS:
33.160.40 Video sistemi Video systems
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

NORME
CEI
INTERNATIONALE
IEC
INTERNATIONAL
STANDARD
AMENDEMENT 2
AMENDMENT 2
1997-05
Amendement 2
Système de vidéodisque optique
réfléchissant préenregistré
«Laser vision» 50 Hz / 625 lignes – PAL
Amendment 2
Pre-recorded optical reflective videodisk
system "Laser vision" 50 Hz / 625 lines – PAL
 IEC 1997 Droits de reproduction réservés  Copyright - all rights reserved
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 R
International Electrotechnical Commission
Pour prix, voir catalogue en vigueur
For price, see current catalogue

60856 Amend. 2 © IEC:1997 – 3 –
FOREWORD
This amendment has been prepared by subcommittee 100B: Recording, of IEC technical
committee 100: Audio, video and multimedia systems and equipment.
The text of this amendment is based on the following documents:
FDIS Report on voting
100B/47/FDIS 100B/66/RVD
Full information on the voting for the approval of this amendment can be found in the report on
voting indicated in the above table.
___________
Page 3
CONTENTS
Add the title of clause 13 as follows:
13  Implementation of a digital audio signal
Page 9
4  Mechanical parameters
Add, after subclause 4.1.2, the following new subclause 4.1.3:
Characteristics Requirements Methods of measurement
to be specified and/or conditions
4.1.3  Thickness of single disk (T), min. = 1,1 mm, see figure 1a
figure 1
max. = 1,4 mm
Replace the existing subclause 4.4 by the following:
Characteristics Requirements Methods of measurement
to be specified and/or conditions
4.4  Label (E), figure 1 A label on both sides of a double
and a single disk is allowed. The
label of a single disk on the
transparent side is optional, but the
label on the protective layer side is
mandatory
4.4.1  Inside diameter of label (F), min. = 35 mm
figure 1
max. = 38 mm
4.4.2  Outside diameter of label (G), min. = 86 mm
figure 1
max. = 100 mm
60856 Amend. 2 © IEC:1997 – 5 –
Characteristics Requirements Methods of measurement
to be specified and/or conditions
4.4.3  Outside diameter of the label min. = 86 mm
(G), figure 1 of a single disk on the
max. = 300 mm
protective layer side
4.4.4  Thickness of label (H), So that thickness of disk in clamping
figure 1 area (subclause 4.5.3) is within
specification
4.4.5  Position of label Should not overlap either centre
hole or, in case of a single disk, the
outer diameter of the protective
layer side
Page 11
Replace the existing subclause 4.5.3 by the following:
Characteristics Requirements Methods of measurement
to be specified and/or conditions
4.5.3  Thickness of disk in clamping
area including labels
4.5.3.1  For double disk (J), figure 1 min. = 2,2 mm
max. = 2,9 mm
4.5.3.2  For single disk (U), min. = 1,1 mm, see figure 1b
figure 1
max. = 1,45 mm, see figure 1b
Page 13
Add, after subclause 4.16.4, the following new subclause 4.16.5:
Characteristics Requirements Methods of measurement
to be specified and/or conditions
See figure 2
4.16.5  Maximum radial angle (θ) ± 1°
between the normal on the surface
(not infoside) and the optical axis
Page 15
Replace the existing subclause 4.20.1 by the following:
Characteristics Requirements Methods of measurement
to be specified and/or conditions
4.20.1  Minimum
8 in version 35
12 in version 35
60856 Amend. 2 © IEC:1997 – 7 –
Replace the existing subclause 4.21.1 by the following:
Characteristics Requirements Methods of measurement
to be specified and/or conditions
4.21.1  Minimum
8 in version 0,18
12 in version 0,18
5  Optical requirements
Replace the existing subclause 5.2 by the following:
Characteristics Requirements Methods of measurement
to be specified and/or conditions
5.2  Birefringence of transparent 40 max.
°
disk (double pass)
Page 17
6  Temperature and humidity requirements
Replace the text in the second column by the following new text:
Requirements
Must satisfy all requirements
following exposure to any
temperature within the range of
5 °C to 45 °C at any relative
humidity within the range of 5 %
to 90 % held constant for a period
of four days
Page 19
9  Video parameters
Replace the existing subclauses 9.1.3 and 9.1.4 by the following:
9.1.3  Vertical interval test signals (VITS)
Vertical interval test signals according to ITU-R Recommendation 473-5, annex I (see figures 7
to 10) may be inserted in the lines 19, 13 or 20, 332 and 326 or 333. The lines 22 and 335 shall
be blanked before optical recording, to enable disk noise measurements to be made.
9.1.4  Address signals
In the video signal, lines 6 through 18 and 319 through 331 are reserved for address or data
signals. For signal specification, see clause 10. The lines that are not specified have a video
content set at blanking level and are reserved for future applications. Lines 20, 21 and 333,
334 may contain subtitle data signals; in that case there are no VITS (see 9.1.3) on lines 20
and 333.
When additional capacity is needed for subtitle data signals, lines 14, 15, 327 and 328 may be
used.
60856 Amend. 2 © IEC:1997 – 9 –
Page 27
10.1.10  CLV picture number
Replace the text of subclause 10.1.10 by the following new text:
On the CLV disk the CLV picture number identifies each video frame and can also be used to
detect hang-ups.
Code: 8 X1 E X3 X4 X5
X1 = A to F and X3 = 0 to 9.
X1 and X3 indicate the seconds of the run time together with the hours and minutes of the
programme time code.
X4 and X5 are the picture numbers within 1 s, thus:
X4 = 0 to 2 and X5 = 0 to 9.
The CLV picture number shall be inserted into line 16 or 329 depending on which field is the
first field of the picture.
The start of the programme time code is zero hour and zero minute, and that of CLV picture
number is zero second and zero picture at the beginning of the active programme.
11.1.2  Numerical aperture
Replace the text of subclause 11.1.2 by the following new text:
The numerical aperture of the lens of the readout beam is:
NA = 0,40 ± 0,01.
Page 29
12  Operational parameters
Add, after clause 12, the following new clause 13:
13  Implementation of a digital audio signal
This clause specifies the implementation of a digital audio signal as an optional addition to the
laser vision system (LV). See sections three and four of IEC 60908.
13.1
Signal modulation
13.1.1  General
The EFM signal, as defined in IEC 60908, prior to modulation, is filtered by a low-pass filter
with a frequency response as detailed in 13.1.2, a high-pass filter with a response as shown in
figure 25, and shall have a pre-emphasis as detailed in figure 25. The digital signal is a
symmetrical double edge pulse width modulated onto the main carrier and recorded on the disk
as shown in figure 23.
60856 Amend. 2 © IEC:1997 – 11 –
13.1.2  Low-pass filter (see figure 24)
a) The frequency response shall be as follows:
1) up to 1,6 MHz ±0,5 dB (ref. 0,5 MHz)
2) 1,75 MHz (–3 ± 0,5) dB
3) 2 MHz (–26 ± 2) dB
4) >2,3 MHz < –50 dB
b) The group delay shall be as follows:
1) <0,5 MHz (0 ± 20) ns (ref. 0,5 MHz)
2) 0,8 MHz (–50 ± 20) ns
3) 1 MHz (–100 ± 50) ns
4) 1,2 MHz (–180 ± 50) ns
5) 1,4 MHz (–350 ± 75) ns
NOTE – This group delay is a predistortion for the low-pass filter of the player.
13.1.3  Pre-emphasis
The EFM signal prior to modulation shall have a pre-emphasis according to figure 25.
13.1.4  High-pass filter
The EFM signal prior to modulation shall be filtered by a high-pass filter according to figure 25.
13.1.5  Modulation of the filtered EFM signal
The filtered EFM signal shall be a symmetrical double edge pulse width modulated on the main
carrier.
The level of this modulated EFM signal in the recorded frequency spectrum shall be –27 dB
± 1 dB with respect to the unmodulated main carrier when no audio signal in present during
digital silence (see figure 26).
13.1.6  Block error rate (BLER)
13.1.6.1  Definitions
See 11.1.1, section three
...