1、BRITISH STANDARD BS EN 60843-3:1993 IEC843-3: 1993 Specification for Helical-scan video tapecassette system using8mm magnetic tape8mm Video Part3: High-band specifications for Hi8 The European Standard EN60843-3:1993 has the status of a BritishStandard UDC 621.397.454BSEN60843-3:1993 This BritishSta
2、ndard, having been prepared under the directionof the Electronic Equipment Standards Policy Committee, was published underthe authority of the Standards Board and comes intoeffect on 15 November 1993 BSI 01-2000 The following BSI references relate to the work on this standard: Committee reference EE
3、L/22 Draft for comment91/34806DC ISBN 0 580 22632 8 Cooperating organizations The European Committee for Electrotechnical Standardization (CENELEC), under whose supervision this European Standard was prepared, comprises the national committees of the following countries: Austria Italy Belgium Luxemb
4、ourg Denmark Netherlands Finland Norway France Portugal Germany Spain Greece Sweden Iceland Switzerland Ireland UnitedKingdom Amendments issued since publication Amd. No. Date CommentsBSEN60843-3:1993 BSI 01-2000 i Contents Page Cooperating organizations Inside front cover National foreword ii Forew
5、ord 2 Text of EN60843-3 3 National annex NA (informative) Committees responsible Inside back coverBSEN60843-3:1993 ii BSI 01-2000 National foreword This BritishStandard has been prepared under the direction of the Electronic Equipment Standards Policy Committee and is the English language version of
6、 EN60843-3:1993 Helical-scan video tape cassette system using8mm magnetic tape8mm Video, Part3: High-band specifications for Hi8, published by theEuropean Committee for Electrotechnical Standardization (CENELEC). It is identical with IEC843-3:1993 published by the International Electrotechnical Comm
7、ission (IEC). 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 itself confer immunity from legal obligations. Summary of pages This docum
8、ent comprises a front cover, an inside front cover, pagesi andii, theEN title page, pages2 to8, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover
9、.EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN60843-3 August 1993 UDC 621.397.454 Descriptors: Video recording, video tape recorder, magnetic tapes, cassette for magnetic tapes, specifications, characteristics English version Helical-scan video tape cassette system using8mm magnetic tape8mm V
10、ideo Part3: High-band specifications for Hi8 (IEC843-3:1993) Systme de magntoscope cassette balayagehlicodal utilisant la bande magntique de8mm Video8mm Partie3: Spcifications frquences levespour Hi8 (CEI843-3:1993) Video-Bandkassettensystem mit Schrgspuraufzeichnung auf Magnetband8mm Video8 Teil3:
11、Hochband-Spezifikation fr Hi8 (IEC843-3:1993) This European Standard was approved by CENELEC on 1993-07-06. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alt
12、eration. 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 any other language made by
13、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, Germany, Greece, Iceland, I
14、reland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland andUnitedKingdom. CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart
15、 35, B-1050 Brussels 1993 Copyright reserved to CENELEC members Ref. No. EN60843-3:1993 EEN60843-3:1993 BSI 01-2000 2 Foreword The text of document60B (CO)142, as prepared by Sub-Committee60B: Video recording, of IEC Technical Committee60: Recording, was submitted to the IEC-CENELEC parallel vote in
16、 March 1992. The reference document was approved by CENELEC as EN60843-3 on6July 1993. The following dates were fixed: Annexes designated “normative” are part of the body of the standard. Annexes designated “informative” are given only for information. In this standard, Annex A and Annex ZA are norm
17、ative and Annex B is informative. Contents Page Foreword 2 1 General 3 1.1 Scope 3 1.2 Normative references 3 2 Definition of high-band tapes 3 2.1 Reference tape 3 2.2 Video characteristics of the high-band tape 3 3 Video tape cassette 4 3.1 Recognition holes 4 4 Recording of luminance component 5
18、4.1 Frequency spectrum allocation of recordingsignals 5 4.2 Pre-emphasis and clipping 5 4.3 Modulation characteristics 6 4.4 Recording current 6 Annex A (normative) Characteristics of the reference tape RSE-5001 7 Annex B (informative) Name and address of themanufacturer of the reference tape 7 Anne
19、x ZA (normative) Other international publications quoted in this standard with thereferences of the relevant European publications 8 Figure 1 Location of recognition holes 4 Figure 2 Frequency spectrum allocation of recording signals 5 Figure 3 Main pre-emphasis circuit 5 Figure 4 Typical vertical p
20、re-emphasis circuit 6 Table 1 Assignment of recognition holes 4 latest date of publication ofan identical national standard (dop) 1994-07-01 latest date of withdrawal ofconflicting national standards (dow) 1994-07-01EN60843-3:1993 BSI 01-2000 3 1 General 1.1 Scope This part of IEC843 provides high-b
21、and specifications for high-quality recording and playback with the8mm video system. This part is applicable to both525line60field and625line50field TV signals. 1.2 Normative references The following normative documents contain provisions which, through reference in this text, constitute provisions
22、of this part of IEC843. At the time of publication, the editions indicated were valid. All normative documents are subject to revision, and parties to agreements based on this part of IEC843 are encouraged to investigate the possibility of applying the most recent editions of the normative documents
23、 indicated below. Members of IEC and ISO maintain registers of currently valid International Standards. IEC843-1, Helical-scan video tape cassette system using8mm magnetic tape8mm Video Part1:General (in preparation). IEC843-2:1992, Helical-scan video tape cassette system using8mm magnetic tape8mm V
24、ideo Part2:PCM multi-track audio system. IEC1105:1991, Reference tapes for video tape recorder systems. 2 Definition of high-band tapes 2.1 reference tape high-band8mm tapes shall be used for high-band8mm video system. A reference tape has been defined for measurements of the recording characteristi
25、cs of the high-band8mm tapes. This reference tape is an MP tape numbered RSE-5001 specified in IEC1105 NOTESeeAnnex A for details of the RSE-5001. 2.2 Video characteristics of the high-band tape All measurements are to be made in comparison with the reference tape described in2.1, with the reference
26、 values taken as0dB. 2.2.1 RF optimum recording current the RF optimum recording current shall be01dB at7MHz for MP tape and1dB 1dB at7MHz forME tape 2.2.2 RF output level the RF output level shall be: 2.2.3 RF frequency response D the RF frequency response D shall be greater than0 NOTEThe playback
27、output levels of the7MHz and10MHz signals recorded at the RF reference recording current of the respective frequencies should be measured. The RF frequency response D is defined as follows: D = d d 0 where d is the relative value in decibels of the playback output level of the10MHz signal to that of
28、 the7MHz signal for the tape to be tested and where d ois the same for the reference tape. for luminance: greater than3dB at7MHz for high-band MP tape; greater than5dB at7MHz for high-band ME tape; for chrominance: greater than0 at0,75MHz for high-band MP tape; greater than1dB at0,75MHz for high-ban
29、d ME tape.EN60843-3:1993 4 BSI 01-2000 2.2.4 carrier-to-noise ratio the carrier-to-noise ratio shall be: 3 Video tape cassette 3.1 Recognition holes Recognition holes1 and5 are used to distinguish among normal MP, high-band MP and high-band MEtapes (seeTable 1 on page 4). Other holes are used as def
30、ined in the existing standards for the8mm videosystem. Table 1 Assignment of recognition holes for luminance: greater than2dB at7MHz for high-band MP tape; greater than5dB at7MHz for high-band ME tape; for chrominance: greater than0 at0,75MHz for both high-band MP and ME tapes. Figure 1 Location of
31、recognition holes Hole1 Hole5 Normal MP Closedw Closedw High-band MP Closedw Open O High-band ME Open O ClosedwEN60843-3:1993 BSI 01-2000 5 4 Recording of luminance component 4.1 Frequency spectrum allocation of recording signals The frequency spectrum allocation of recording signals is shown in Fig
32、ure 2 below. 4.2 Pre-emphasis and clipping The luminance signal shall be given sub pre-emphasis and main pre-emphasis and DC clipped prior to frequency modulation. Due to the adoption of DC clipping, the clipping levels shown below are determined irrespective of the frequency characteristics of the
33、emphasized signal. Main pre-emphasis The main pre-emphasis shall be added by using the circuit shown in Figure 3 or its equivalent. Sub pre-emphasis The sub pre-emphasis characteristics shall be in accordance with the IEC843-1 specification. Figure 2 Frequency spectrum allocation of recording signal
34、s White clipping level: 220% measured from sync tip. Dark clipping level: 90% measured from sync tip, (The sync tip to peak white level is100%.) Figure 3 Main pre-emphasis circuitEN60843-3:1993 6 BSI 01-2000 Vertical pre-emphasis The vertical pre-emphasis is optional and shall be added prior to the
35、sub pre-emphasis and killed during the vertical blanking interval. A typical vertical pre-emphasis circuit is shown in Figure 4. 4.3 Modulation characteristics FM carrier frequencies corresponding to reference video levels shall be as follows: 4.4 Recording current The recording current shall exhibi
36、t the optimum value at7MHz, which is the center frequency of the FM carrier range as defined in4.3. Figure 4 Typical vertical pre-emphasis circuit Sync tip level: 5,7MHz 0,1MHz Peak white level: 7,7MHz 0,05MHz Deviation: 2,0MHz 0,1MHzEN60843-3:1993 BSI 01-2000 7 Annex A (normative) Characteristics o
37、f the reference tape RSE-5001 A.1 Model IEC8mm format MP reference tape RSE-5001. A.2 Specifications A.2.1 Electromagnetic properties The specifications stated in this subclause are added to those of Hi8. A.2.2 Tape thickness 134m (nominal). A.2.3 Tape length 28m (equivalent to P6-30). Other specifi
38、cations shall comply with IEC843-1. NOTERSE-5001 is the IEC8mm format MP reference tape with the following specifications of electromagnetic properties: Annex B (informative) Name and address of the manufacturer of the reference tape Apply to Sony Corporation Magnetic Products Group Major Customer S
39、ales Division 6-7-35 Kitashinagawa, Shinagawa-ku, Tokyo141, Japan a) RF optimum recording current(7MHz) 0 0,3dB b) RF output for luminance(7MHz) 0 0,3dB c) RF output for chrominance(0,75MHz) 0 0,3dB d) RF frequency response(10MHz/7MHz) 0 0,3dB e) Carrier-to-noise ratio for luminance(7MHz) 0 0,3dB f)
40、 Carrier-to-noise ratio for chrominance(0,75MHz) 0 0,3dB a) RF optimum recording current(5MHz) 0 0,3dB; b) RF output for luminance(5MHz) 0 0,3dB; c) RF output for chrominance(0,75MHz) 0 0,3dB; d) RF frequency response (5MHz/2MHz) 0 0,3dB. Tel : 03-3448-3126 Fax : 03-3447-4378 Tlx : SONYCORPJ22262EN6
41、0843-3:1993 8 BSI 01-2000 Annex ZA (normative) Other international publications quoted in this standard with the references of the relevant European publications When the international publication has been modified by CENELEC common modifications, indicated by (mod), the relevant EN/HD applies. IEC
42、publication Date Title EN/HD Date 843-1 Helical-Scan video tape cassette system using8mm magnetic tape8mm Video Part1: General (in preparation) 843-2 1992 Part2: PCM multi-track audio system 1105 1991 Reference tapes for video tape recorder systems BSEN60843-3:1993 BSI 01-2000 National annex NA (inf
43、ormative) Committees responsible The United Kingdom participation in the preparation of this European Standard was entrusted by the Electronic Equipment Standards Policy Committee (EEL/-) to Technical Committee EEL/22, upon which the following bodies were represented: Association of Professional Rec
44、ording Services Ltd. Audio Engineering Society British Broadcasting Corporation British Kinematograph, Sound and Television Society British Tape Industry Association Independent Television Association Independent Television Commission National Council for Educational Technology (NCET) Royal Photogra
45、phic Society Royal Television Society Sound and Communication Industries FederationBS EN 60843-3:1993 IEC843-3: 1993 BSI 389 Chiswick High Road London W4 4AL BSIBritishStandardsInstitution BSI is the independent national body responsible for preparing BritishStandards. It presents the UK view on sta
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