1、BRITISH STANDARD BS EN 60856:1993 IEC 856:1986 Implementing Amendment No. 1 not published separately Specification for Pre-recorded optical reflective videodisk system “Laser vision” 50Hz/625 lines PAL The European Standard EN 60856:1993, with the incorporation of its amendments A1:1993 and A2:1997
2、has the status of a British Standard ICS 33.160.40BS EN60856:1993 This British Standard, having been prepared under the direction of the Electronic Equipment Standards Policy Committee, was published under the authority of the Standards Board and comes into effect on 15 July 1993 BSI 04-1999 The fol
3、lowing BSI references relate to the work on this standard: Committee reference EEL/22 Draft for comment 89/20181 DC ISBN 0 580 22151 2 Cooperating organizations The European Committee for Electrotechnical Standardization (CENELEC), under whose supervision this European Standard was prepared, compris
4、es the national committees of the following countries: Austria Italy Belgium Luxembourg Denmark Netherlands Finland Norway France Portugal Germany Spain Greece Sweden Iceland Switzerland Ireland United Kingdom Amendments issued since publication Amd. No. Date Comments 9795 January 1998 Indicated by
5、a sideline in the marginBS EN60856:1993 BSI 04-1999 i Contents Page Cooperating organizations Inside front cover National foreword ii Foreword 2 Text of EN 60856 5 National annex NA (informative) Committees responsible Inside back coverBS EN60856:1993 ii BSI 04-1999 National foreword This British St
6、andard has been prepared under the direction of the Electronic Equipment Standards Policy Committee and is the English language version of EN60856:1993 Pre-recorded optical reflective videodisk system “Laser vision” 50Hz/625 lines PAL and its Amendment A1: February 1993, and Amendment A2: July 1997,
7、 published by the European Committee for Electrotechnical Standardization (CENELEC). It is identical with IEC856:1986 and its Amendment 1: July1991 and Amendment 2: May1997, published by the International Electrotechnical Commission (IEC). This standard supersedes BS6895:1987, which is withdrawn. Fo
8、r ease of reference, the text introduced by AmendmentsA1 and A2 to EN60856 is indicated by a single sideline in the margin. References to page numbers in the text relate to the IEC page numbers given in brackets at the bottom of each page. Copies of International Radio Consultative Committee (CCIR)
9、documents may be purchased through BSI Standards, Linford Wood, Milton Keynes, MK146LE. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of
10、itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, the EN title page, pages 2 to 44, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have had amendments incor
11、porated. This will be indicated in the amendment table on theinside front cover.EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 60856 February 1993 + A1 February 1993 + A2 July 1997 UDC 621.397.456 Supersedes HD 514 S1:1989 Descriptors: Optical recording, video recording, video disc, video disc
12、 reproducing equipment, laser, test conditions, characteristics, requirements English version Pre-recorded optical reflective videodisk system “Laser vision” 50 Hz/625 lines PAL (includes amendment A1:1993 and A2:1997) (IEC 856:1986/A1:1991 + A2:1997) Systme de vidodisque optique rflchissant prenreg
13、istr “Laser vision” 50 Hz/625 lignes PAL (inclut lamendement A1:1993 et A2:1997) (CEI 856:1986/A1:1991 + A2:1997) System fr bespielte, optische reflektierende Videoplatten “Laser-Vision” 50 Hz/625 Zeilen PAL (enthlt nderung A1:1993 und A2:1997) (IEC 856:1986/A1:1991 + A2:1997) This European Standard
14、 was approved by CENELEC on1992-12-09; amendment A1 was approved by CENELEC in1997; amendment A2 was approved by CENELEC on 1997-07-01. CENELEC member are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a nation
15、al 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
16、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, Denmark, Finland, France,
17、Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central
18、 Secretariat: rue de Stassart 35, B-1050 Brussels 1997 Copyright reserved to CENELEC members Ref. No. EN 60856:1993 + A1:1993 + A2:1997 EEN60856:1993 BSI 04-1999 2 Foreword At the request of the 71st Technical Board of CENELEC HD514S1:1989 (IEC856:1986) was submitted to the CENELEC voting procedure
19、for conversion into a European Standard. The text of the International Standard was approved by CENELEC as EN60856 on 9December1992. The CENELEC questionnaire procedure, performed for finding out whether or not Amendment 1:1991 to the International Standard IEC856:1986 could be accepted without text
20、ual changes, has shown that no common modifications were necessary for the acceptance as a European Standard. The reference document was submitted to the CENELEC members for formal vote and was approved by CENELEC as amendment A1 to EN60856 on 9December1992. The following dates were fixed: For produ
21、cts which have complied with HD514 S1:1989 before1993-12-01, as shown by the manufacturer or by a certification body, this previous standard may continue to apply for production until1998-12-01. Foreword to amendment A2 The text of document 100B/47/FDIS, future amendment 2 to IEC60856:1986, prepared
22、 by SC100B, Recording, of IECTC100, Audio, video and multimedia systems and equipment, was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as amendment A2 to EN60856:1993 on 1997-07-01. The following dates were fixed: latest date of publication of an identical national standar
23、d (dop) 1993-12-01 latest date of withdrawal of conflicting national standards (dow) 1993-12-01 latest date by which the amendment has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 1998-04-01 latest date by which the national standards c
24、onflicting with the amendment have to be withdrawn (dow) 1998-04-01EN60856:1993 BSI 04-1999 3 Contents Page Introduction 5 Section 1. General 1 Scope 5 2 Object 5 3 Standard atmospheric conditions for testing 5 Section 2. Disk parameters 4 Mechanical parameters 5 5 Optical requirements 6 Temperature
25、 and humidity requirements Section 3. Recorded parameters 7 Audio parameters 9 7.1 Channel applications 9 7.2 Audio subcarrier modulation of main carrier 10 8 Audio subcarrier frequencies 10 8.1 Type of modulation 10 8.2 Polarity of modulation 10 8.3 Pre-emphasis 10 8.4 Audio compression 10 9 Video
26、parameters 10 9.1 Video signal 10 9.2 Video signal modulation 11 10 Vertical interval control and address signals 11 10.1 24-bit biphase coded signal 11 Section 4. Operational signals 11 Definition of playback measurement system 13 11.1 Optical stylus 13 11.2 Measuring set-up 13 11.3 General measure
27、ment conditions 14 12 Operational parameters 14 12.1 Radial signal 14 12.2 Tangential signal 15 12.3 High-frequency signal 15 13 Implementation of a digital audio signal 15 Appendix A List of abbreviations 39 Appendix B Audio compression system 39 Appendix C Programme status code 43 Page Figure 1 Me
28、chanical parameters of the disk (see4.1 to 4.13) 17 Figure 1a Thickness of protective transparent layer as a function of the refractive index of disk material (Sub-clause4.1 and 5.1) 18 Figure 1b Possible profiling of the clamping area of a single disk without labels (see4.5.3.2) 18 Figure 2 Measure
29、ment of vertical deviation and radial angle () of programme tracks during rotation at playback speed (see4.16) 19 Figure 3 Measurement of static deflection of disk (Sub-clause4.17) 19 Figure 4 Measurement of radial deviation of programme tracks during rotation at playback speed*. Disk is rotating ar
30、ound geometric centre of centre hole (Sub-clause4.18) 19 Figure 5 Pre-emphasis of the audio signal (Sub-clause 8.3) 20 Figure 6 Video signal pilot burst (Sub-clause9.1.2) 21 Figure 6a Detail of Figure 6 22 Figure 7 VITS (Sub-clause9.1.3) 23 Figure 8 VITS (see9.1.3) 24 Figure 9 VITS (Sub-clause9.1.3)
31、 25 Figure 10 VITS (see9.1.3) 26 Figure 11 Group delay pre-distortion (Sub-clause9.1.6) 27 Figure 12 Pre-emphasis of the video signal (Sub-clause9.2.4) 28 Figure 13 Hexadecimal value (Sub-clause10.1) 28 Figure 14 Bit cell length and digital level (Sub-clause10.1) 29 Figure 15 Radial signal (Sub-clau
32、se12.1) 30 Figure 16 Limits of RMI (Sub-clause12.1.1) 30 Figure 17 Limits of RRI (Sub-clause12.1.2) 31 Figure 18 High-frequency signal (Sub-clause12.3) 31 Figure 19 Limits of HFMI (see12.3.1) 32 Figure 20 Linear velocity and angular acceleration for CLV format (Sub-clause 4.7.2 and 4.7.3) 33EN60856:
33、1993 BSI 04-1999 4 Page Figure 21 Characteristic of the RD signal 34 Figure 22 Material build-up 34 Figure 23 Signal processing encoding 35 Figure 24 Recommended low-pass filter part values 36 Figure 25 High-pass filter and pre-emphasis 37 Figure 26 Level of EFM signal 38 Figure B.1 Compression curv
34、e 40 Figure B.2 Block diagram encoder (stereo) 41 Figure B.3 Block diagram encoder (bilingual) 42EN60856:1993 BSI 04-1999 5 Introduction The optical videodisk system functions as follows: The information carrier is a disk structure consisting of a transparent substrate, of which one surface contains
35、 the information covered with a reflective coating. Two such substrates are assembled, information surface against information surface to form an optical videodisk. One of these two substrates might also be a “blank”, characterized by the absence of information, but in all other mechanical aspects c
36、onform to this standard. The information on the disk is stored in a spiral track starting at the inside at a fixed diameter and moving to the outside. The information is read out by a beam of light which passes through the transparent substrate and is reflected by the information on the encoded surf
37、ace. The reflected beam is modulated by the information on the encoded surface. Within the system two disk formats exist: the CAV disk and the CLV disk. CAV stands for Constant Angular Velocity and CLV for Constant Linear Velocity. In the CAV format each revolution corresponds to one complete record
38、ed video frame. Consequently during readout the disk will rotate at constant angular velocity. A disk thus recorded makes possible features such as still pictures, slow motion, etc. In the CLV format the velocity of the information track relative to the readout beam is constant. Therefore the angula
39、r velocity decreases as the readout beam proceeds along the spiral track to the outside. A disk recorded in this way yields a longer playing time. Features such as still pictures, however, are not possible. IEC Publication 856 which is the current standard for “Laser vision” does not contain a speci
40、fication for a push-pull radial differential signal. For future applications of the video disk, it is desirable to specify this signal and to add this specification to the current standard. The specified amplitude variation of the signal represents the state of the art of LV-disk production. Section
41、 1. General 1 Scope This standard applies to pre-recorded optical reflective videodisks compatible with 50Hz/625 lines CCIR monochrome and colour coding PAL systems, and defines those parameters that effect the interchangeability of the disks, excluding limitations of the programming material and so
42、urce. 2 Object To serve as a reference for manufacturers intending to make disks or players compatible with the optical system described herein. 3 Standard atmospheric conditions for testing Measurements and mechanical checks shall be carried out at any combination of temperature, humidity and air p
43、ressure within the following limits unless otherwise specified for certain parameters elsewhere in this standard: Ambient temperature: 15 C to 35 C Relative humidity: 45% to75% Air pressure: 86kPa to 106kPa Samples shall be conditioned in the testing environment for 24h before testing.EN60856:1993 6
44、 BSI 04-1999 Section 2. Disk parameters 4 Mechanical parameters Characteristics to be specified Requirements Method of measurement and/or conditions 4.1 Thickness in the programme area: 4.1.1 Thickness of protective transparent layer, (A), Figure 1 SeeFigure 1a 4.1.2 Thickness of double disk (B), Fi
45、gure 1 min. = 2.2mm, seeFigure 1a max. = 2.8mm 4.1.3 Thickness of single disk (T),Figure 1 min. = 1,1mm, seeFigure 1a max. = 1,4mm 4.2 Outer radius of disk (C), Figure 1 12-in version 8-in version 150 0.5mm 100 0.5mm To be measured at 20 1 C and 48% to 52% relative humidity 4.3 Centre hole (D), Figu
46、re 1 To be measured with a maximum and a minimum plug gauge at 20 1 C and 48% to 52% relative humidity 4.3.1 Diameter of centre hole 4.3.2 Diameter of centre hole for disk assembled from two single disks 4.3.3 Shape of edges of centre hole Edges shall be free from burrs 4.4 Label (E), Figure 1 A lab
47、el 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), Figure 1 min. = 35mm max. = 38mm 4.4.2 Outside diameter of label (G), Figure 1 min. =
48、 86mm max. = 100mm 4.4.3 Outside diameter of label (G), Figure 1 of a single disk on the protective layer side min. = 86mm max. = 300mm 4.4.4 Thickness of label (H), Figure 1 So that thickness of disk in clamping area 4.5.3) is within specification 4.4.5 Position of label Should not overlap either c
49、entre hole or, in case of a single disk, the outer diameter of the protective layer sideEN60856:1993 BSI 04-1999 7 4.5 Clamping area (I): Figure 1 4.5.1 Inside radius of clamping area 20.5mm 4.5.2 Outside radius of clamping area 41.5mm 4.5.3 Thickness of disk in clamping area including labels 4.5.3.1 For double disk (J), Figure 1 min. = 2,2mm max. = 2,9mm 4.5.3.2 For single disk (U), Figure 1 min. = 1,1mm, seeFigure 1b max. = 1,45mm, seeFigure 1b 4.6 Sense of ro
