SIST EN 62356-1:2006

SLOVENSKI SIST EN 62356-1:2006

STANDARD
januar 2006
Video snemanje – Format vrste D-11 z magnetnim trakom s širino 12,65 mm –
1. del: Snemanje na trak (IEC 62356-1:2003)
(istoveten EN 62356-1:2004)
Video recording – 12,65 mm type D-11 format – Part 1: Tape recording (IEC 62356-
1:2003)
ICS 33.160.40 Referenčna številka
©  Standard je založil in izdal Slovenski inštitut za standardizacijo. Razmnoževanje ali kopiranje celote ali delov tega dokumenta ni dovoljeno

EUROPEAN STANDARD EN 62356-1
NORME EUROPÉENNE
EUROPÄISCHE NORM October 2004

ICS 33.160.40
English version
Video recording –
12,65 mm TYPE D-11 format
Part 1: Tape recording
(IEC 62356-1:2003)
Enregistrement Vidéo –  Videoaufzeichnung –
Format 12,65 mm de type D11 D-11-Format mit 12,65 mm
Partie 1: Enregistrement sur bande Teil 1: Bandaufzeichnung
(CEI 62356-1:2003) (IEC 62356-1:2003)

This European Standard was approved by CENELEC on 2004-09-01. 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 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 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, Cyprus, Czech
Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden,
Switzerland and United Kingdom.

CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung

Central Secretariat: rue de Stassart 35, B - 1050 Brussels

© 2004 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.

Ref. No. EN 62356-1:2004 E
Foreword
The text of the International Standard IEC 62356-1:2003, prepared by IEC TC 100, Audio, video and
multimedia systems and equipment, was submitted to the formal vote and was approved by
CENELEC as EN 62356-1 on 2004-09-01 without any modification.
The following dates were fixed:
– latest date by which the EN has to be implemented
at national level by publication of an identical
national standard or by endorsement (dop) 2005-09-01
– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2007-09-01
Annex ZA has been added by CENELEC.
__________
Endorsement notice
The text of the International Standard IEC 62356-1:2003 was approved by CENELEC as a European
Standard without any modification.
__________
- 3 - EN 62356-1:2004
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
The following referenced documents are indispensable for the application of this document. For dated
references, only the edition cited applies. For undated references, the latest edition of the referenced
document (including any amendments) applies.
NOTE Where an international publication has been modified by common modifications, indicated by (mod), the relevant
EN/HD applies.
Publication Year Title EN/HD Year
IEC 61213 1993 Analogue audio recording on video tape - EN 61213 1994
Polarity of magnetization
IEC 61237-1 1994 Broadcast video tape recorders - Methods EN 61237-1 1994
of measurement
Part 1: Mechanical measurements

IEC 62356-2 2003 Video recording - 12,65 mm type D-11 EN 62356-2 2004
format
Part 2: Picture compression and data
stream
IEC 62356-3 2003 Part 3: Data mapping over SDTI EN 62356-3 2004

ITU-R 2004 Parameter values for the HDTV* standard - -
Recommendation for production and international program
BT.709 exchange
SMPTE 12M 1999 Television, audio and film - Time and - -
control code
SMPTE 292M 1998 Bit-Serial digital interface for high- - -
definition television systems
SMPTE 276M 1995 Transmission of AES-EBU digital audio - -
signals over coaxial cable
AES3 1992 Serial transmission format for two- - -
channel linearly represented digital audio
data
INTERNATIONAL IEC
STANDARD 62356-1
First edition
2003-12
Video recording –
12,65 mm TYPE D-11 format –
Part 1:
Tape recording
 IEC 2003  Copyright - all rights reserved
No part of this publication may be reproduced or utilized in any form or by any means, electronic or
mechanical, including photocopying and microfilm, without permission in writing from the publisher.
International Electrotechnical Commission, 3, rue de Varembé, PO Box 131, CH-1211 Geneva 20, Switzerland
Telephone: +41 22 919 02 11 Telefax: +41 22 919 03 00 E-mail: inmail@iec.ch Web: www.iec.ch
PRICE CODE
Commission Electrotechnique Internationale
XB
International Electrotechnical Commission
МеждународнаяЭлектротехническаяКомиссия
For price, see current catalogue

– 2 – 62356-1  IEC:2003(E)
CONTENTS
FOREWORD.5

1 Scope.7
2 Normative references.7
3 Abbreviations and acronyms.8
4 Environment and test conditions .8
4.1 Environmental conditions.8
4.2 Calibration tape.8
4.3 Record locations and dimensions .8
5 Tape and cassette physical specifications .8
5.1 Magnetic tape specifications.8
5.2 Cassette specifications.9
6 Tape record physical parameters.31
6.1 Tape speed .31
6.2 Helical record physical parameters.31
6.3 Longitudinal record physical parameters .31
7 Longitudinal track signal and magnetic parameters.35
7.1 Longitudinal track-record parameters .35
7.2 Control track record parameters .35
7.3 Time- and control-code track-record parameters .35
7.4 Cue recording.36
8 Helical track signal parameters and magnetization .37
8.1 Overview.37
8.2 Introduction.37
8.3 Helical track data parameters .38
8.4 Channel coding.50
8.5 Magnetization.50
8.6 Video data outer correction .51
8.7 Data arrangement in audio data sectors .52

Annex A (normative)  Digital interfaces .62
Annex B (informative) Tape transport and scanner.64
Annex C (informative) Compatibility with the other digital formats using Type-L
derivative cassettes .67
Annex D (informative) Compatibility with analog Type-L.68

Bibliography.69

Figure 1 – Top- and side-view dimensions (S-Cassette).11
Figure 2 – Bottom-view dimensions (S-Cassette) .12
Figure 3 – Datum areas, supporting areas, tape guides and associated dimensions (S-
Cassette) .14
Figure 4 – Reel location in the unlocked position (S-Cassette).15
Figure 5 – Protecting lid dimensions (S-Cassette).16
Figure 6 – Reel dimensions (S-Cassette) .17

62356-1  IEC:2003(E) – 3 –
Figure 7 – Reel height in the unlocked position (S-Cassette) .17
Figure 8 – Unlocking lever insertion area (S-Cassette.18
Figure 9 – Lid unlocking force (S-Cassette) .19
Figure 10 – Lid opening force (S-Cassette).19
Figure 11 – Reel spring force (S-Cassette) .19
Figure 12 – Safety plug strength (S-Cassette).20
Figure 13 – Extraction force (F1, F2) and friction torque (S-Cassette).20
Figure 14 – Top and side views (L-Cassette) .21
Figure 15 – Bottom view (L-Cassette) .22
Figure 16 – Datum areas, supporting areas and tape guides (L-Cassette).24
Figure 17 – Reel location in unlocked position (L-Cassette) .25
Figure 18 – Protecting lid (L-Cassette).26
Figure 19 – Reel dimensions (L-Cassette) .27
Figure 20 – Reel height in unlocked operation (L-Cassette) .27
Figure 21 – Unlocking lever insertion area (L-Cassette) .28
Figure 22 – Lid unlocking force (L-Cassette).29
Figure 23 – Lid opening force (L-Cassette) .29
Figure 24 – Reel spring force (L-Cassette).29
Figure 25 – Safety plug strength (L-Cassette) .30
Figure 26 – Extraction force (F1, F2) and friction torque (L-Cassette) .30
Figure 27 – Locations and dimensions of recorded tracks .33
Figure 28 – Locations and dimensions of tolerance zones of helical track records .34
Figure 29 – Recorded control code waveform .36
Figure 30 – Helical recording block diagram .37
Figure 31 – Helical playback block diagram .38
Figure 32 – Sector arrangement on helical track .39
Figure 33 – Sector and segment arrangement on helical track .40
Figure 34 – Video sync block format .41
Figure 35 – Audio sync block format .42
Figure 36 – Sync block identification bytes .43
Figure 37 – ID : Sync block number.45
Figure 38 – Segment, channel and track counts.47
Figure 39 – Video outer ECC .52
Figure 40 – 20/24 bit packing sequence.53
Figure 41 – Audio sample conversion block diagram.53
Figure 42 – Start and end sample number of burst data mode .54
Figure 43 – Continuous mode data mapping .55
Figure 44 – Audio auxiliary data words .56
Figure 45 – Audio data block layout .57
Figure 46 – Sync block shuffling (Audio sector 0).58
Figure 47 – Sync block shuffling (Audio sector 1).58
Figure 48 – Sync block shuffling (Audio sector 2).59
Figure 49 – Sync block shuffling (Audio sector 3).59

– 4 – 62356-1  IEC:2003(E)
Figure 50 – AES3 channel sector shuffling.60
Figure A1 – System overview.62
Figure B1 – Possible scanner configuration (29,97 Hz, 25 Hz, 24 Hz and 23,98 Hz
Frame rates) .65
Figure B2 – Possible longitudinal head location and tape wrap (29,97 Hz, 25 Hz, 24 Hz
and 23,98 Hz Frame rates) .66

Table 1 – Record location and dimensions (29,97PsF/59,94I, 25PsF/50I, 24 PsF and
23,98PsF systems) .32
Table 2 – ID : Sync block number.46
Table B1 – Parameters for a possible scanner design.64
Table B2 – Data rate and recorded wavelength.64

62356-1  IEC:2003(E) – 5 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
VIDEO RECORDING –
12,65 mm TYPE D-11 FORMAT –
Part 1: Tape recording
FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote
international co-operation on all questions concerning standardization in the electrical and electronic fields. To
this end and in addition to other activities, IEC publishes International Standards, Technical Specifications,
Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC
Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested
in the subject dealt with may participate in this preparatory work. International, governmental and non-
governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely
with the International Organization for Standardization (ISO) in accordance with conditions determined by
agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence
between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in
the latter.
5) IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any
equipment declared to be in conformity with an IEC Publication.
6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
members of its technical committees and IEC National Committees for any personal injury, property damage or
other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
Publications.
8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of
patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 62356-1 has been prepared by IEC technical committee 100:
Audio, video and multimedia systems and equipment
The text of this standard was submitted to the national committees for voting under the Fast
Track Procedure as the following documents:
CDV Report on voting
100/629/CDV 100/699/RVC
Full information on the voting for the approval of this standard can be found in the report on
voting indicated in the above table.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.

– 6 – 62356-1  IEC:2003(E)
The committee has decided that the contents of this publication will remain unchanged until
2008-11. At this date, the publication will be
• reconfirmed;
• withdrawn;
• replaced by a revised edition, or
• amended.
62356-1  IEC:2003(E) – 7 –
VIDEO RECORDING –
12,65 mm TYPE D-11 FORMAT –
Part 1: Tape recording
1 Scope
This International Standard specifies the format for the recording of Type D-11 compressed
pictures, four channels of AES3 data and associated data which form helical records on
12,65 mm tape in cassettes. This standard also defines the helical track record parameters,
the content and format of the longitudinal records and the cassette physical specifications.
The recording format supports frame frequencies of 30/1,001 Hz, 25 Hz, 24 Hz and
24/1,001 Hz.
2 Normative references
The following referenced documents are indispensable for the application of this document.
For dated references, only the edition cited applies. For undated references, the latest edition
of the referenced document (including any amendments) applies.
IEC 61213:1993, Analogue audio recording on video tape – Polarity of magnetization
IEC 61237-1:1994, Broadcast video tape recorders – Methods of measurement – Part 1:
Mechanical measurements
IEC 62356-2, Video recording – 12,65 mm type D-11 format – Part 2: Picture compression
and data stream
IEC 62356-3, Video recording – 12,65 mm type D-11 format – Part 3: Data mapping over
SDTI
ITU-R Recommendation BT.709:2004, Parameter values for the HDTV* standard for
production and international program exchange
SMPTE 12M:1999, Television – Audio and Film – Time and Control Code
SMPTE 292M:1998, Bit-Serial Digital Interface for High-Definition Television Systems
SMPTE 276M:1995, Transmission of AES-EBU Digital Audio Signals Over Coaxial Cable
AES3-1992,Serial transmission format for two-channel linearly represented digital audio data
———————
To be published.
– 8 – 62356-1  IEC:2003(E)
3 Abbreviations and acronyms
For the purposes of this document, the following abbreviations and acronyms apply.
AUX Auxiliary
DCT Discrete cosine transform
ECC Error correcting code
EOB End of block
I-NRZI Interleaved non-return to zero inverted
MUX Multiplex
VLC Variable length coding
4 Environment and test conditions
4.1 Environmental conditions
Tests and measurements made on the system to check the requirements of this standard
shall be carried out under the following conditions:
– temperature: 20 °C ± 1 °C
– relative humidity: 50 % ± 2 %
– barometric pressure: from 86 kPa to 106 kPa
– tape tension: 0,3 N ± 0,05 N
– tape conditioning: not less than 24 h
4.2 Calibration tape
Calibration tapes meeting the tolerances specified below should be made available by
manufacturers of digital television tape recorders and players in accordance with this
standard.
4.3 Record locations and dimensions
Geometrical location and dimensions of the recordings on the tape and their relative positions
in regard to timing relations of the recorded signals shall be as specified in Figure 27 and
Table 1 . Tolerances shown in Table 1 should, however, be reduced by 50 % for calibration
tapes.
5 Tape and cassette physical specifications
5.1 Magnetic tape specifications
5.1.1 Base
The base material shall be polyester or equivalent.
5.1.2 Tape width and width fluctuation
The tape width shall be 12,650 mm ± 0,005 mm. Tape width fluctuation shall not exceed 6 µm
peak to peak. The value of tape width fluctuation shall be evaluated by measuring 10 points,
each 20 mm apart, over a tape length of 200 mm.

62356-1  IEC:2003(E) – 9 –
5.1.1 Tape thickness
The tape thickness shall be from 12,5 µm to 13,8 µm.
5.1.2 Offset yield strength
The offset yield strength shall be greater than 15 N.
5.1.3 Magnetic coating
The magnetic tape used shall have a coating of metal particles or equivalent, longitudinally

oriented. The coating coercivity shall be in the range of 120 000 A/m to 140 000 A/m, with an
applied field of 800 000 A/m (10 000 oersted) as measured by a 50 Hz or 60 Hz BH meter or
vibrating sample magnetometer (VSM).
5.2 Cassette specifications
5.2.1 Cassette dimensions
Two sizes of cassettes shall be identified as follows:
S cassette 96 × 156 × 25 mm As shown in Figures 1 to 13
L cassette 145 × 254 × 25 mm As shown in Figures 14 to 26

5.2.2 Tape length and recording time
Maximum tape length and recording time are recommended as follows:
+2 40 min for 48 min for 50 min for 50 min for
S cassette
241 m m
0 29,97PsF/59,94I 25PsF/50I 24PsF 23,98PsF
+2 124 min for 148 min for 155 min for 155 min for
L cassette
732 m m
29,97PsF/59,94I 25PsF/50I 24PsF 23,98PsF

5.2.3 Datum planes
Datum plane Z shall be determined by three datum areas, A, B and C, as shown in Figures 3a
and 16a. Datum plane X shall be orthogonal to datum plane Z and shall include the centres of
datum holes (a) and (b). Datum plane Y shall be orthogonal to both datum plane X and datum
plane Z and shall include the centre of datum hole (a) as shown in Figures 2 and 15.
5.2.4 Tape winding
The magnetic coating side of the magnetic tape shall face outside on both the supply reel and
the take-up reel as shown in Figures 4 and 17.
5.2.5 Label area and window area
The hatched areas shown in Figures 1 and 14 are for the label and window. Labels attached
to the cassette shall not protrude above the outside cassette surface plane.
5.2.6 Guiding groove
For correct insertion into the VTR, four guiding grooves for S cassettes, as shown in Figures 1
and 2, and three guiding grooves for L cassettes, as shown in Figure 15, shall be provided.

– 10 – 62356-1  IEC:2003(E)
5.2.7 Safety tab and safety plug for recording inhibition
For S cassettes, a safety plug at the supply reel side and a hole of minimum depth 10 mm
from datum plane Z at the take-up reel side shall be provided as shown in Figure 2.
For L cassettes, a safety plug shall be provided at the take-up reel side as shown in Figure
15.
The safety plug shall not be deformed by 0,3 mm or more when a force of 2,0 N (204 gf) is
applied to the centre of it, using a 2,5 mm diameter rod. See Figures 12 and 25.
5.2.8 Identification holes
Six identification holes (holes 1 to 6) shall be located as specified in Figures 2 and 15. For
this format, holes 1, 2, 3, 4 and 6 shall be closed. Hole 5 shall be open.
5.2.9 Reels
5.2.9.1 Reel lock system
The reels shall be automatically unlocked when the cassette is inserted into the video tape
recorder and/or player unit and automatically locked when the cassette is ejected from it.
The locations of the reels when in the unlocked position are shown in Figures 4 and 17.
Dimensions of the reels are shown in Figures 6 and 19. Heights of the reels are shown in
Figures 7 and 20.
The reel shall be completely released when the cassette lid is opened 23,5 mm minimum from
datum plane Z.
5.2.9.2 Reel spring force
The reels assembled in the cassette shall be pressed by the reel spring with a specified force
under the conditions specified in Figures 11 and 24. The spring force shall be 1,5 N ± 0,5 N
(153 gf ± 51 gf) for S cassettes and 3,5 N ± 0,5 N (357 gf ± 51 gf) for L cassettes when
pressing on a reel 2,4 mm above datum plane Z as shown in Figures 11 and 24.
5.2.9.3 Extraction force
The force (F1, F2) required to pull the tape out from the reel shall not exceed 0,17 N (17 gf),
as specified in Figures 13a and 26a.
5.2.9.4 Friction torque
The torque required to wind the tape shall be less than 15 mN m (152 gf cm) for S cassettes
and less than 30 mN m (305 gf cm) for L cassettes, as specified in Figures 13b and 26b.
5.2.10 Protecting lid
The cassette lid shall be automatically unlocked when the cassette is inserted into the video
tape recorder and/or player unit and automatically locked when the cassette is ejected from it.
The unlocking lever insertion area is specified in Figures 8 and 21. The lid shall be unlocked
when the lid lock lever is shifted in either direction A or B, as illustrated in Figures 9 and 22.
The force required to unlock the lid shall be less than 1 N (101 gf) in the A direction or less
than 1,5 N (152 gf) in the B direction.

62356-1  IEC:2003(E) – 11 –
The lid shall open 29,0 mm with a force of 1,5 N (152 gf) or less as specified in Figures 10
and 23.
IEC  2549/03
Dimensions in millimetres
NOTE 1 These dimensions are inspected by using limit gauges.
NOTE 2 No part of the lid shall protrude beyond the bottom plane of the cassette when the lid opens nor when it
closes.
NOTE 3 These dimensions shall be specified based on datum plane Z.
NOTE 4 Label and/or window areas shown by the hatched area are available for the label and/or window.
NOTE 5 The cassette may be held in position by the recorder and/or player unit on the holding area shown by the
cross-hatched area.
NOTE 6 The fine-hatched area shows the acceptable range of plug-notch position and depth at the side.
Figure 1 – Top- and side-view dimensions (S-Cassette)

– 12 – 62356-1  IEC:2003(E)
IEC  2550/03
Dimensions in millimetres
NOTE 1 Datum hole (a) is primary.
NOTE 2 The cross-hatched area shows the VTR detection area.
Figure 2 – Bottom-view dimensions (S-Cassette)

62356-1  IEC:2003(E) – 13 –
IEC  2551/03
Figure 3a – Datum areas and supporting areas
IEC  2552/03
Dimensions in millimetres
Figure 3b -Tape guides
– 14 – 62356-1  IEC:2003(E)
NOTE 1 The cross-hatched areas 10 mm in diameter are datum areas.
NOTE 2 The four supporting areas shown by the hatched areas shall be coplanar with their corresponding datum
areas within 0,05 mm of each of them.
NOTE 3 Datum plane Z shall be defined by the three datum areas, A, B, C.
NOTE 4 Datum area D shall be coplanar, within 0,3 mm, with datum plane Z.
NOTE 5 The areas within 1 mm of the edges of a cassette shall not be included in the supporting areas.
Measurement L: 15 mm.
NOTE 6 The perpendicularity of tape guides is specified as follows (even if they themselves are tapered):

a b
Direction X Y
Tape guide mm mm
Supply side
0 ± 0,15 0 ± 0,15
Take-up side 0 ± 0,15 0 ± 0,15

a
Direction X: Parallel to the tape running direction.
b
Direction Y: Horizontally orthogonal to direction X.

Figure 3 – Datum areas, supporting areas, tape guides
and associated dimensions (S-Cassette)

62356-1  IEC:2003(E) – 15 –
IEC  2553/03
Dimensions in millimetres
NOTE 1 The rotating direction of reels during forward operation.
NOTE 2 The lid opening height L shall be 29 mm or more.
NOTE 3 The reel shall be reset completely when the lid opening height L is 23,5 mm.

Figure 4 – Reel location in the unlocked position (S-Cassette)

– 16 – 62356-1  IEC:2003(E)
IEC  2554/03
Dimensions in millimetres
NOTE 1 The hatched area is where the loading mechanism of the video tape recorder and/or player unit positions
the video cassette when it is inserted.
NOTE 2 The hatched and cross-hatched areas are so designed that the loading mechanism of the video tape
recorder and/or player unit unwinds and extends the magnetic tape towards the head drum after the lid opens.

Figure 5 – Protecting lid dimensions (S-Cassette)
(This condition is sometimes defined as “Minimum space for loading mechanism”.)

62356-1  IEC:2003(E) – 17 –
IEC  2555/03
Dimensions in millimetres
NOTE The reels with large hubs (hub diameter 53,3 ± 0,2 mm) can be used for cassettes whose recording time is
less than 12 min.
Figure 6 – Reel dimensions (S-Cassette)

IEC  2556/03
Dimensions in millimetres
Figure 7 – Reel height in the unlocked position (S-Cassette)

– 18 – 62356-1  IEC:2003(E)
IEC  2557/03
Dimensions in millimetres
NOTE 1 The cross-hatched and hatched areas show the allowable total area where the unlocking lever extending
from the video tape recorder and/or player unit can be inserted into a cassette.
NOTE 2 The cross-hatched area shows the range of the unlocking lever insertion which permits the lid to be
unlocked.
NOTE 3 Allowable range within which the unlocking lever can be inserted in the A direction.
NOTE 4 Allowable range within which the unlocking lever can be inserted in the B direction.
NOTE 5 The tip of the unlocking lever shall be shaped into a semicircle or hemisphere whose radius is a half of
the unlocking lever width.
Figure 8 – Unlocking lever insertion area (S-Cassette)

62356-1  IEC:2003(E) – 19 –
Direction A
The force to unlock the lid shall be not
greater than 1,0 N in the A direction.
Refer to Figure 8 regarding the measuring
ranges.
IEC  2558/03
Direction B
The force to unlock the lid shall be less than
1,5 N in the B direction.
Refer to Figure 8 regarding the measuring
ranges.
IEC  2559/03
Figure 9 – Lid unlocking force (S-Cassette)

The maximum force to open the lid shall be
1,5 N.
Dimensions in millimetres
IEC  2560/03
Figure 10 – Lid opening force (S-Cassette)
The force of the spring for pushing down
the reel shall be (1,5 ±±±± 0,5) N.

Dimensions in millimetres
IEC  2561/03
Figure 11 – Reel spring force (S-Cassette)

– 20 – 62356-1  IEC:2003(E)
IEC  2562/03
Dimensions in millimetres
Figure 12 – Safety plug strength (S-Cassette)

IEC  2563/03 IEC  2564/03
Figure 13a – Extraction force (F1, F2)  Figure 13b – Friction torque

NOTE 1 Holdback torque of 1 mN m.
NOTE 2 Friction torque to wind the tape.
Figure 13 – Extraction force (F1, F2) and friction torque (S-Cassette)

62356-1  IEC:2003(E) – 21 –
IEC  2565/03
Dimensions in millimetres
NOTE 1 These dimensions are inspected by using limit gauges.
NOTE 2 No part of the lid shall protrude beyond the bottom plane of the cassette when the lid opens or when it
closes.
NOTE 3 The label and/or window area shown by the hatched area is available for the label and/or window.
NOTE 4 The cassette may be held in position by the recorder and/or player unit on the holding area shown by
the cross-hatched area.
NOTE 5 The fine-hatched area shows the acceptable range of plug-notch position and depth at the side.

Figure 14 – Top and side views (L-Cassette)

– 22 – 62356-1  IEC:2003(E)
IEC  2566/03
Dimensions in millimetres
NOTE 1 Datum hole (a) is primary.
NOTE 2 The cross-hatched area shows the VTR detection area.
NOTE 3 Datum holes (a) and (b) may be utilized for screw holes.
Figure 15 – Bottom view (L-Cassette)

62356-1  IEC:2003(E) – 23 –
IEC  2567/03
Dimensions in millimetres
Figure 16a – Datum spots and supporting area

IEC  2568/03
Figure 16b – Tape
– 24 – 62356-1  IEC:2003(E)
NOTE 1 The four round areas 10 mm in diameter are datum areas.
NOTE 2 The four supporting areas shown by the cross-hatched areas shall be coplanar with their corresponding
datum areas within 0,05 mm of each of them and shall be coplanar with the hatched areas.
NOTE 3 Datum plane Z shall be defined by the three datum areas, A, B, C.
NOTE 4 Datum area D shall be coplanar, within 0,3 mm, with datum plane Z.
NOTE 5 The areas within 1 mm of the edges of the cassette shall not be included in the supporting areas.
Measurement L: 15 mm
NOTE 6 The perpendicularity of tape guides is specified as follows (even if they themselves are tapered).

a b
Direction X Y
Tape guide mm mm
Supply side
0 ± 0,15 0 ± 0,15
Take-up side 0 ± 0,15 0 ± 0,15
a
Direction X: Parallel to the tape running direction
b
Direction Y: Horizontally orthogonal to direction X

Figure 16 – Datum areas, supporting areas and tape guides (L-Cassette)

62356-1  IEC:2003(E) – 25 –
IEC  2569/03
Dimensions in millimetres
NOTE 1 The rotating direction of reels during forward operation.
NOTE 2 The lid opening height L shall be 29 mm or more.
NOTE 3 The reel shall be reset completely when the lid opening height L is 23,5 mm.

Figure 17 – Reel location in unlocked position (L-Cassette)

– 26 – 62356-1  IEC:2003(E)
IEC  2570/03
Dimensions in millimetres
NOTE 1 The hatched area is where the loading mechanism of the video tape recorder and/or player unit
positions the video cassette when it is inserted.
NOTE 2 The hatched and cross-hatched areas are so designed that the loading mechanism of the video tape
recorder and/or player unit unwinds and extends the magnetic tape towards the head drum after the lid opens.

Figure 18 – Protecting lid (L-Cassette)
(This condition is sometimes defined as “Minimum space for loading mechanism”.)

62356-1  IEC:2003(E) – 27 –
IEC  2571/03
Dimensions in millimetres
NOTE The reels with large hubs (hub diameter 53,3 mm ± 0,2 mm) can be used for cassettes whose recording
time is less than 34 min.
Figure 19 – Reel dimensions (L-Cassette)

IEC  2572/03
Dimensions in millimetres
Figure 20 – Reel height in unlocked operation (L-Cassette)

– 28 – 62356-1  IEC:2003(E)
IEC  2573/03
Dimensions in millimetres
NOTE 1 The cross-hatched and hatched area shows the allowable total area where the unlocking lever extending
from the video tape recorder and/or player unit can be inserted into a cassette.
NOTE 2 The cross-hatched area shows the range of the unlocking lever insertion which permits the lid to be
unlocked.
NOTE 3 Allowable range within which the unlocking lever can be inserted in the A direction.
NOTE 4 Allowable range within which the unlocking lever can be inserted in the B direction.
NOTE 5 The tip of the unlocking lever shall be shaped into a semicircle or hemisphere whose radius is a half of
the unlocking lever width.
Figure 21 – Unlocking lever insertion area (L-Cassette)

62356-1  IEC:2003(E) – 29 –
Direction A
The force to unlock the
lid shall be not greater
than 1,0 N in the A
direction.
Refer to Figure 21
regarding the
measuring ranges.
Direction B
The force to unlock the
lid shall be less than
1,5 N in the B direction.
Refer to Figure 21
regarding the
measuring ranges.
IEC  2574/03
Dimensions in millimetres
Figure 22 – Lid unlocking force (L-Cassette)

The maximum force to open the
lid shall be 1,5 N.
IEC  2575/03
Figure 23 – Lid opening force (L-Cassette)

The force of the spring for
pushing down the reel shall be
(3,5 ±±±± 0,5) N.
IEC  2576/03
Dimensions in millimetres
Figure 24 – Reel spring force (L- Cassette)

– 30 – 62356-1  IEC:2003(E)
IEC  2577/03
Dimensions in millimetres
Figure 25 – Safety plug strength (L-Cassette)

IEC  2578/03 IEC  2579/03
Figure 26a – Extraction force (F1, F2) Figure 26b – Friction torque

NOTE 1 Holdback torque of 1 mN m.
NOTE 2 Friction torque to wind the tape.
Figure 26 – Extraction force (F1, F2) and friction torque (L-Cassette)

62356-1  IEC:2003(E) – 31 –
6 Tape record physical parameters
6.1 Tape speed
The tape speed shall be 96,7 mm/s for 29,97 Hz frame rates, 80,664 mm/s for 25 Hz frame
rates, 77,437 mm/s for 24 Hz frame rates or 77,36 mm/s for 23,98 Hz frame rates. The tape
speed tolerance shall be ± 0,2 %.
6.2 Helical record physical parameters
6.2.1 Helical record location and dimensions
The reference edge of the tape for the dimensions specified in this standard shall be the lower
edge as shown in Figure 27. The magnetic coating, with the direction of tape travel as shown
in Figure 27, is on the side facing the observer.
The program reference point for each video frame is determined by the intersection of a line
which is parallel to the reference edge of the tape at the distance Y from the reference edge
and the centre-line of the first track in each video frame; that is track 0 of segment 0. The
program reference point defines the start of the first video sector in the video frame.
The physical locations and dimensions of the helical recordings on the tape and their relative
positions with regard to the time code start bit and the reference edge shall be as specified in
Figure 27 and Table 1.
6.2.2 Helical track record tolerance zones
The lower edges of all four consecutive tracks shall be contained within the pattern of the four
tolerance zones defined in Figure 28.
Each zone is defined by two parallel lines which are inclined at an angle of 4,626 44° with
respect to the tape reference edge.
The centre-lines of all zones shall be spaced apart by 0,021 7 mm. The width of zones 2, 3
and 4 shall be 0,008 mm. The width of zone 1 shall be 0,004 mm. These zones are
established to contain track-angle errors, track-straightness errors and vertical-head offset
tolerance.
The measuring techniques shall be as shown in IEC 61237-1, Clause 7.
6.2.3 Helical track gap azimuth
The azimuth angle of the head gaps used for recording the helical tracks shall be at an angle
of α or α to the line perpendicular to the helical tracks, as specified in Figure 27 and

0 1
Table 1.
The azimuth of the first track of every frame, that is the program reference point, shall be
orientated in the counter-clockwise direction with respect to the line perpendicular to the track
direction when viewed from the side of the tape carrying the magnetic recording.
6.3 Longitudinal record physical parameters
6.3.1 Longitudinal record location and dimensions
The track widths and tolerances of the cue control and time code tracks shall be as defined in
Figure 27 and Table 1.
– 32 – 62356-1  IEC:2003(E)
6.3.2 Longitudinal track gap azimuth
The azimuth angle of the head gaps used for recording the longitudinal tracks shall be
perpendicular to the tracks.
Table 1 – Record location and dimensions
(29,97PsF/59,94I, 25PsF/50I, 24 PsF and 23,98PsF systems)
Dimensions Dimensions in mm
Nominal Tolerance
A Time code track lower edge 0 Basic
B Time code track upper edge 0,4 ± 0,065
C Control track lower edge 0,7 ± 0,065
D Control track upper edge 1,1 ± 0,065
E Program area lower edge 1,388 Derived
F Program area upper edge 11,518 Derived
G Cue track lower edge 11,85 ± 0,065
H Cue track upper edge 12,45 ± 0,065
I Helical track pitch (+/- azimuth) 0,02 Ref.
J Helical track pitch (+/+ azimuth) 0,043 4 Ref.
K1 Video sector 0 length 56,166 Der
...