1、STD.BSI BS EN b085b-ENGL 1773 9 Lb24bb7 b8747d 188 9 BRITISH STANDARD Specification for Pre-recorded optical reflective videodisk system Laser vision 50 Hd625 lines - PAL The European Standard EN 60856 : 1993, with the incorporation of its amendments Al : 1993 and A2 : 1997 has the status of a Briti
2、sh Standard ICs 33.160.40 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW BS EN 60856 : 1993 IEC 856 : 1986 Implementing Amendmmt No. 1 not published separately STDoBSI BS EN bO85b-ENGL 1793 m lb29bb7 Ob87499 0111 m BSEN60866:1995 Issue 2, January 1998 Equipment StMdUds hiicy
3、MNO. Committee, was pubiished under the authority of the Stanars Board and comes inta efect on 15 July 1993 8 BSI 1998 The following Bm references relate to the work on this Standard: Committee reference EEU22 Draft far comment 9/20181 Dc 9796 Cooperating organizations Date Waffected Jmuay 1998 Indi
4、cated by a sideline in the marglli The European Committee for Electrotechnid Standardization (CENELEC), under whose supervision this European Standard was prepared, comprises the national committees of the following countries: Austria Belgium Denmark Finiand Fiance Germany Greece Iceland Ireland IMY
5、 Luxembourg Netherlands Norway Portugal Spain Sweden Switzerland United Kingdom STD-BSI BS EN bO85b-ENGL 1993 LbZLibbS Ob875110 bbb Issue 1, January 1998 BS EN 60856 : 1993 Summary of pages The following table identifies the current issue of each page. Issue 1 indicates that a page has been introduc
6、ed for the first time by amendment. Subsequent issue numbers indicate an updated page. Vertical sidelining on replacement pages indicates the most recent changes (amendment, addition, deletion). Page Front cover Inside front cover a b i 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 1 7a 1% 18 19 11 Issu
7、e 2 2 1 blank 2 blank 2 2 2 original 2 2 2 2 2 2 original original original 2 Original Original 2 1 1 2 2 Page 19a 19b 20 21 22 23 24 25 26 27 28 29 30 30a 30b 30c 30d 31 32 33 34 35 36 37 38 Inside back cover Back cover issue 1 blank 3riginal Original 2 2 original original original original 2 origi
8、nal 2 1 1 1 1 original Original original original 2 2 2 blank 2 original O BSI 1998 a STD-BSI BS EN bO85b-ENGL 1793 lb24bb Ob87501 5T2 Issue 2, January 1998 BS EN 6856 : 1993 Contents page Cooperating organizations Inside front cover National foreword i Foreword 2 Rxt of EN 60856 4 National annex NA
9、 (informative) Committees responsible Inside back cover National foreword This British Standard has been prepared under the direction of the Electronic Equipment standards Policy Committee and is the Engish language version of 50 H.625 lines - PAL and its Amendment Al : Febniary 1993, and I Amenment
10、 A2 : July 1997, published by the European Committee for Electrotechnical standardization (CENELEC). It is identical with IEC 856 : 1986 I and its Amendment 1 : July 1991 and Amendment 2 : May 1997, published by the Intemational Elerntechnical Commission (IEC). This standard supersedes BS 6895 : 198
11、7, which is withdrawn. For ease of reference, the text introduced by Amendments Al and A2 to EN 60856 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 Con
12、sultative Committee (CCIR) documents may be purchased through BSI Standards, Word Wood, Miton Keynes, MK14 6LE. Compliance with a British Standard does not of itself confer immunity from legal obligations. EN 60856 : 1993 P -recor amendmentAl was approved by CENELEC in 1997; amendment A2 was approve
13、d by CENELEC on 1997441. CENELEC memkm are bound to Compsr with the cEN/cENELEc Intemal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Uptodate lists and bibiiographical references concerning such national standa
14、rdsmay be obtained on application to the Central Secretariat or to any CENELEC member. This European Standard exists in three officiai versions (English, fiench, German). A version in any other language made by translation under the responsibiiity of a CENELEC member into its own language and notifi
15、ed to the Centrai Secretanat has the same status as the officiai versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Denmark, Finland, fiance, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and U
16、nited Kingdom. CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fur Elektrotechnische Normung Centrai Secretariat: rue de Stassart 35, B-1050 Brussels O 1997 Copyright reserved to CENELEC members Ref. No. EN 60856 : 1
17、993 + Al : 1993 + A2 : 1997 E STD-BSI BS EN b085b-ENGL 1773 Lb24bb7 Ob87503 375 Page 2 EN 60856 : 1993 Issue 2, January 1998 Foreword At the request of the 71st Technical Board of CENELEC HD 514 S1 : 1989 (IEC 856 : 1986) was submitted to the CENELEC voting procedure for conversion into a European S
18、tandard. The text of the International Standard was approved by CENELEC as EN 60856 on 9 December 1992. The CENELEC questionnaire procedure, performed for finding out whether or not Amendment 1 : 1991 to the International Standard IEC 856 : 1986 could be accepted without textual changes, has shown t
19、hat 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 Al to EN 60856 on 9 December 1992. The foliowing dates were fixed: - latest date of publication o
20、f an identical national standard (dop) 1993-12-01 - latest date of withdrawal of conficting national standards (dow) 1993-12-01 Foreword to amendment A2 The text of document 100 in that case there are no VITS (see Sub- clause 9.1.3) on lines 20 and 333. When additional capacity is needed for subtitl
21、e data signals, lines 14, 15,327 and 328 may be used. I 9.1.5 Maximum video level The maximum luminance level of the video signal shall not exceed 110% and the maximum chroma saturation shall not exceed 100%. IEC page 191 OBSI 1998 STD-BSI BS EN bO5b-ENGL 1793 m Lb2qbb Ob87512 388 W Page 11 EN 60856
22、 : 1993 9.1.6 Group delay pre-disrortion To equalize the group delay distortion of the playback low-pass filter, the video group delay shall be pre-distorted as follows (see Figure 11, page 43): .f = 0.5 MHz 1, = O ns reference j = 1.0 MHz t, = -10 f 15ns f = 3.0 MHz i, = -35 f 15 ns .f = 4.0 MHz t,
23、 = -85 f 20ns f = 4.43 MHz id = -135 +_ 20ns ,f = 4.8 MHz r, = -200 $r 50 ns 9.1 Video signal modulation 9.1.1 T+pe of modulation The video signal shall be frequency modulated on the main carrier with positive modulation. _. 9.3.2 Blanking level frequency - The main carrier frequency corresponding t
24、o the 30% blanking level shall be = = - 7.1 MHz 50 kHz. - * 9.3.3 Main carrier deviarion rn The 30% blanking level to + 100% white level deviation shall be 800 rt_ 20 kHz. White level is the highest frequency. 9.2.4 Video pre-emphasis The video signal, prior to modulation, shall have a pre-emphasis
25、as shown in Figure 12, page 45. 10. Vertical interval control and address signals The code signals on the video disk provide special information, which can be utilized by the player to control special functions and provide picture frame or time information. 1. 2. 3. 4. 5. 6. 7. The CAV format has th
26、e following types of codes: Lead-in Lead-out Picture numbers Picture stop Chapter numbers Programme status code Users code IEC page 2 11 - STD-BSI BS EN bOA5b-ENGL 1993 1b24bb Ob87513 214 W Page 12 EN60856: 1993 On CLV format the codes are: 1. Lead-in 2. Lead-out 3. Programme time code 4. CLV code 5
27、. Chapter numbers 6. CLV picture number 7. Programme status code 8. Users code 1 O. 1 24-bit biphase codt-t signal This signal is inserted in selected video lines during the vertica interval. It is subdivided into 6 groups of 4 bits and each group can be any hexadecimal word (see Figure 13, page 45)
28、. The first group of 4 bits is the key and starts with a logic one. Each,bit cell is 2 ps long with the digital level between 30% and 100% (see Figure 14, page47). 1 O. I .I Lead-in The lead-in code indicates the start of the programme (see Sub-clause4.9). The 24-bit biphase lead-in code with a hexa
29、decimal value of “88FFFF” is inserted into lines 17, 18, 330 and 331 during at least a number of tracks corresponding to 1.5 mm prior to the active programme start. 1 O. 1.2 Lead-out The lead-out code indicates the end of the programme (see Sub-clause 4.13). The 24-bit biphase lead-out code with a h
30、exadecimal value of “80EEEE” is inserted in lines 17, 18, 330 and 331 during at least 2 mm after the end of the active programme (see Sub- clause 4.14). 1 O. 1.3 Picture numbers The picture numbers shall be present during the active programme on CAV disks. They are unique and in a normal count seque
31、nce starting with number 1 at the beginning of the active programme. The picture numbers shall be inserted into lines 17 and 18 or in lines 330 and 331, depending on which field is the first of the picture. The hexadecimal value is: FX,X,X,X,X,. X, through X, represent the picture number, X, being t
32、he least significant digit. The maximum available picture number is 99999. I O. 1.4 Picture stop code On CAV disks, the picture stop code enables the playback equipment to switch auto- matically to the still picture mode from normal speed or slow motion. The 24-bit biphase picture stop code with a h
33、exadecimal value of “82CFFF” is inserted in lines 16 and 17 or 329 and 330 of the field immediately following the field in which the 24-bit picture number was inserted to enable stopping on the selected picture. On CLV disks there is no picture stop code. IEC page 23 I - - STD.BSI BS EN bOBSb-ENGL 1
34、993 D lb24bb9 Ob7S111 150 hge 13 EN 60856 : 1993 1 O. 1.5 Cltnpter numbers Chapter numbers indicate parts of the programme as a chapter and are optional. They are unique and in a normal count sequence starting with a selectable number at the beginning of the active programme (i.e. number “O” or “1”
35、or a pre-set number consecutive to the last number of a previous disk with the same programme content). lhe 24-bit biphase coded chapter numbers, if present, are inserted in lines 17, 18 and 330, 331 in the fields of the whole active programme area which do not have an insertion of picture numbers o
36、n CAV disks. However, for lines 17 and 330, picture stop code has priority. On CLV disks, they are inserted in line 18 or 331 in the fields of the whole active programme area which do not have an insertion of programme time code and CLV picture num ber. Each chapter number starts with a stop-bit (th
37、e first bit after the key) at a zero-logic value during 400 tracks followed by at least 400 tracks with a stop-bit at a one-logic value until the next chapter starts. The zero value stop-bit is intended to disable the search action of the player. The first chapter directly after the lead-in area sha
38、ll not have a stop-bit of zero-logic value. The hexadecimal value is “8X,X2DDD”. X, and X2 are the chapter numbers. The maximum number is 79. - On disks with chapters shorter than 800 tracks the stop bit of each chapter number shall = 7 = have the logic value “one”. The minimum length of a chapter w
39、ill be 30 tracks. 7 - ii = I O. 1.6 Procramme time code - The programme time code is always present on CLV disks during the active programme and indicates the running time (expressed in hours and minutes). The 24-bit biphase programme time code with a hexadecimal value of “FX, DDX,X,” is inserted in
40、 lines 17 and i8 or 330 and 331 depending on which field is the first field of the picture. X, indicates the hours X, and X, indicate the minutes 1 O. 1.7 Constant linear velocity code The CLV code is always present in the active programme on a CLV disk. It indicates the CLV format. The 24-bit CLV c
41、ode with a hexadecimal value of “87FFFF” is inserted in line 330 or 17 in the fields of the whole active programme area which do not have an insertion c,f programme time code and CLV picture number. I O. 1.8 Programme status code The programme status code identifies the use of the audio and video ch
42、annels and will be Code: 8 _ DC X3, X4, X5 (see Appendix C for explanation) Insertion on CLV disks is: line 329 or 16, in the same fields where CLV code is On CAV disks the insertion is: lines 16 and 329. inserted in the active programme area. BA inserted. Now. - Picture stop code has priority over
43、the programme status code. IEC page 251 STD.BS1 BS EN bO85b-ENGL 1993 162qbb9 Ob87515 U77 Page 14 EN 60856 : 1993 Issue 2, January 1998 1 O. i .9 Users code The users code is intended for filing and identification and can be inserted as an option in the lead-in and lead-out area. The data content is
44、 up to the disk manufacturer. Code: 8x1 D X3 X4 X5 XI = O through 7; X3, X4, X5 = O through F. Insertion in lead-in and/or lead-out area in the lines 16, 329. 1 O. 1.1 O CL V picture number On the CLV disk the CLV picture number identifies each video frame and can also be used to detect hang-ups. Co
45、de: 8 X1 E X3 X4 X5. I XI =AtoFandX3=Oto9. XI and X3 indicate the seconds of the run time together with the hours and minutes of the X4 and X5 are the picture numbers within 1 s, thus: X4 = O to 2 and X5 =O to 9. The CLV picture number shall be inserted into line 16 or 329 depending on which field i
46、s the first field of the picture. nie start of the programme time code is zero hour apd zero minute, and that of CLV picture number is zero second and zero picture at the beginning of the active programme. programme time code. I 1 SECTION FOUR - OPERATIONAL SIGNALS 11. Definition of playback measure
47、ment system 1 1.1 Oprical stylus 1 I. 1.1 Waveengrh The wavelength of the used light is: A = 6 328 A. 1 1.1.2 Numerical aperture The numerical apemire of the lens of the readout beam is: NA = 0.40 f 0.0 1. 1 1.1.3 Readout beam The readout beam has a circular cross-section and a Gaussian intensity pr
48、ofile. The intensity at the rim is 23 k 1% of the intensity at the centre. 1 1.1.4 Readout spot In the readout spot the peak intensity of the first diffraction ring is less than 2% of the peak intensity of the central diffraction disk. 1 1.2 Measuring Set-up In the measuring Set-up the readout spot
49、is projected on a photodiode. The electrical output of this diode is raised by means of an amplifier to a convenient level for the actual measurement. Both photodiode and amplifier shall have an adequate bandwidth. IEC page 271 O BSI 1998 STD-BSI BS EN bU5b-ENGL 1993 Lb24bb9 Ob751b T23 = Page 15 EN 0856 : 1993 1 1.3 General measurement conditions 1 1.3.1 The angle between the normal to the information plane and the centrai ray of the optical 11.3.2 The information plane lies within the region of depth of focus of the optical stylus: stylus is
