EN 62141:2006

Helical-scan digital video cassette recording format using 12,65 mm magnetic tape and incorporating MPEG-4 compression - Type D-16 format

specifies the track content, format, and recording method of the data blocks containing compressed video, AES3 audio data, and associated data which form the helical records on 12,65 mm tape in cassettes. This standard supports recording of source picture formats using 1920 1080 pixels with the 4:4:4 and 4:2:2 sampling structure specified in SMPTE 274M at the frame rate of 23,98 Hz, 24 Hz, 25 Hz and 29,97 Hz, and using 1280 720 pixels with the 4:2:2 sampling structure specified in SMPTE 296M at the frame rates of 50 Hz and 59,94 Hz (see note). This standard also supports recording of 12 channels of AES3 audio data and 3 lines of uncompressed blanking interval data. This standard includes packetizing and shuffling operations supporting picture compression using the DCT and DPCM encoding methods defined by ISO/IEC 14496-2 (MPEG-4 simple studio profile).

Videoaufzeichnung - Videokassettensystem mit digitaler Schrägspuraufzeichnung auf Magnetband 12,65 mm und eingeschlossener MPEG-4-Kompression - Format D-16

Format d'enregistrement à balayage hélicoïdal pour cassette vidéo numérique utilisant une bande magnétique de 12,65 mm avec système de compression MPEG-4 - Format D-16

La CEI 62141:2005 définit le contenu des pistes, leur format et la méthode d'enregistrement des blocs de données contenant de la vidéo compressée, des données audio AES3 et des données associées qui forment les enregistrements hélicoïdaux sur une bande de 12,65 mm dans des cassettes. La présente norme prend en charge l'enregistrement de formats d'image source utilisant 1920 x 1080 pixels avec la structure d'échantillonnage 4:4:4 et 4:2:2 spécifiée dans la SMPTE 274M aux fréquences image de 23,98 Hz, 24 Hz, 25 Hz et 29,97 Hz, et utilisant 1280 x 720 pixels avec la structure d'échantillonnage 4:2:2 spécifiée dans la SMPTE 296M aux fréquences image de 50 Hz et 59,94 Hz (voir note). Cette norme prend également en charge l'enregistrement de 12 voies de données audio AES3 et 3 lignes de données non compressées d'intervalle de suppression vertical. Cette norme inclut les opérations de mise en paquets et de brassage prenant en charge la compression d'image utilisant les méthodes de codage DCT et DPCM définies par l'ISO/CEI 14496-2 ("MPEG-4 simple studio profile"). La présente version bilingue (2012-11) correspond à la version anglaise monolingue publiée en 2005-10.

Digitalno zapisovanje v videorekorderju s poševnimi sledmi na magnetni trak, širok 12,65 mm, s kompresijo po MPEG-4 – Format tipa D-16

General Information

• Status: Published
• Publication Date: 07-Jun-2006
• Withdrawal Date: 30-Apr-2009
• ICS: 33.160.40 - Video systems
• Technical Committee: CLC/TC 100X - Audio, video and multimedia systems and equipment and related sub-systems
• Drafting Committee: IEC/TC 100 - IEC_TC_100
• Parallel Committee: IEC/TC 100 - IEC_TC_100
• Current Stage: 6060 - Document made available - Publishing
• Start Date: 08-Jun-2006
• Completion Date: 08-Jun-2006
• Ref Project: SIST EN 62141:2006 - Helical-scan digital video cassette recording format using 12,65 mm magnetic tape and incorporating MPEG-4 compression - Type D-16 format

Standards Content (Sample)

SLOVENSKI SIST EN 62141:2006
STANDARD
oct 2006
Digitalno zapisovanje v videorekorderju s poševnimi sledmi na magnetni
trak, širok 12,65 mm, s kompresijo po MPEG-4 – Format tipa D-16
Helical-scan digital video cassette recording format using 12,65 mm magnetic tape
and incorporating MPEG-4 compression – Type D-16 format
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 62141
NORME EUROPÉENNE
June 2006
EUROPÄISCHE NORM
ICS 33.160.40
English version
Helical-scan digital video cassette recording format using
12,65 mm magnetic tape and incorporating MPEG-4 compression -
Type D-16 format
(IEC 62141:2005)
Format d'enregistrement à balayage Videoaufzeichnung -
hélicoïdal pour cassette vidéo numérique Videokassettensystem mit digitaler
utilisant une bande magnétique Schrägspuraufzeichnung auf Magnetband
de 12,65 mm avec système 12,65 mm und eingeschlossener
de compression MPEG-4 - MPEG-4-Kompression -
Format D-16 Format D-16
(CEI 62141:2005) (IEC 62141:2005)

This European Standard was approved by CENELEC on 2006-05-01. 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 two official versions (English, 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, the Czech
Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain,
Sweden, Switzerland and the 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

© 2006 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 62141:2006 E
Foreword
The text of the International Standard IEC 62141:2005, 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 62141 on 2006-05-01 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) 2007-05-01
– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2009-05-01
Annex ZA has been added by CENELEC.
__________
Endorsement notice
The text of the International Standard IEC 62141:2005 was approved by CENELEC as a European
Standard without any modification.
__________
- 3 - EN 62141:2006
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  When 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 of EN 61237-1 1994
measurement
Part 1: Mechanical measurements

ISO/IEC 14496-2 2004 Information technology - Coding of audio-- -
visual objects
Part 2: Visual
ITU-R 2002 Parameter values for the HDTV standards for - -
Recommendation production and international programme
BT.709 exchange
SMPTE 12M 1999 Television - Audio and film - Time and Control - -
code
SMPTE 274M 2003 Television - 1920 x 1080 Scanning and - -
Analog and Parallel Digital Interfaces for
Multiple Picture Rates
SMPTE 276M 1995 Transmission of AES-EBU Digital Audio - -
Signals Over Coaxial Cable
SMPTE 292M 1998 Bit-Serial Digital Interface for High-Definition - -
Television Systems
SMPTE 296M 2001 Television - 1280 x 720 Progressive Image - -
Sample Structure - Analog and Digital
Representation and Analog Interface

SMPTE 299M 1997 Television - 24-Bit Digital Audio Format for - -
HDTV Bit-Serial Interface
SMPTE 372M 2002 Television - Dual Link 292M Interface for - -
1920 x 1080 Picture Raster
SMPTE RP 188 1999 Transmission of Time Code and Control Code - -
in the Ancillary Data Space of a Digital
Television Data Stream
AES3 1997 Serial transmission format for two-channel - -
linearly represented digital audio data

INTERNATIONAL IEC
STANDARD 62141
First edition
2005-10
Helical-scan digital video cassette
recording format using 12,65 mm magnetic
tape and incorporating MPEG-4 compression –
Type D-16 format
Reference number
IEC 62141:2005(E)
Publication numbering
As from 1 January 1997 all IEC publications are issued with a designation in the
60000 series. For example, IEC 34-1 is now referred to as IEC 60034-1.
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edition numbers 1.0, 1.1 and 1.2 refer, respectively, to the base publication, the
base publication incorporating amendment 1 and the base publication incorporating
amendments 1 and 2.
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INTERNATIONAL IEC
STANDARD 62141
First edition
2005-10
Helical-scan digital video cassette
recording format using 12,65 mm magnetic
tape and incorporating MPEG-4 compression –
Type D-16 format
 IEC 2005  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: [phone] Telefax: [phone] E-mail: [e-mail] Web: www.iec.ch
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For price, see current catalogue

– 2 – 62141  IEC:2005(E)
CONTENTS
FOREWORD.6

1 Scope.8
2 Normative references .8
3 Terms, definitions and acronyms .9
3.1 Terms and definitions .9
3.2 Acronyms .10
4 Environment and test conditions .10
4.1 Calibration tape.11
4.2 Record locations and dimensions .11
5 Tape and cassette physical specifications .11
5.1 Magnetic tape specifications .11
5.2 Cassette specifications.11
6 Tape record physical parameters.34
6.1 Input reference signal.34
6.2 Tape speed .34
6.3 Helical record physical parameters.34
6.4 Longitudinal record physical parameters .35
7 Longitudinal track signal and magnetic parameters.39
7.1 Longitudinal track record parameters.39
7.2 Control track record parameters .39
7.3 Time and control code track record parameters .40
8 Source picture and audio processing .41
8.1 Introduction .41
8.2 Input formats .44
8.3 Input data segmentation and shuffling .46
8.4 Picture data encoding.60
8.5 Data packing .63
8.6 Audio input format and data packing.77
9 Helical track signal parameters and magnetization .80
9.1 Introduction .80
9.2 Video data outer correction and shuffling.80
9.3 Audio data outer correction and shuffling.82
9.4 Helical track data parameters .86
9.5 Channel coding .97
9.6 Magnetization.97

Annex A (normative)  Digital interfaces .98
Annex B (informative)  Tape transport and scanner.100
Annex C (informative)  Compatibility with the other digital formats using Type-L
derivative cassettes .103

62141 IEC:2005(E) – 3 –
Figure 1 – Top- and side-view dimensions (S-cassette) .14
Figure 2 – Bottom-view dimensions (S-cassette).15
Figure 3 – Datum areas, supporting areas, tape guides and associated dimensions
(S-cassette) .17
Figure 4 – Reel location in the unlocked position (S-cassette) .17
Figure 5 – Protecting lid dimensions (S-cassette) .18
Figure 6 – Reel dimensions (S-cassette).19
Figure 7 – Reel height in the unlocked position (S-cassette) .19
Figure 8 – Unlocking lever insertion area (S-cassette) .20
Figure 9 – Lid unlocking force (S-cassette) .22
Figure 10 – Lid opening force (S-cassette).22
Figure 11 – Reel spring force (S-cassette) .22
Figure 12 – Safety plug strength (S-cassette) .23
Figure 13 – Extraction force (F1, F2) and friction torque (S-cassette) .23
Figure 14 – Top and side views (L-cassette) .24
Figure 15 – Bottom view (L-cassette).25
Figure 16 – Datum areas, supporting areas and tape guides (L-cassette) .27
Figure 17 – Reel location in unlocked position (L-cassette).27
Figure 18 – Protecting lid (L-cassette) .28
Figure 19 – Reel dimensions (L-cassette) .29
Figure 20 – Reel height in unlocked operation (L-cassette) .29
Figure 21 – Unlocking lever insertion area (L-cassette).30
Figure 22 – Lid unlocking force (L-cassette) .32
Figure 23 – Lid opening force (L-cassette) .32
Figure 24 – Reel spring force (L-cassette) .32
Figure 25 – Safety plug strength (L-cassette).33
Figure 26 – Extraction force (F1, F2) and friction torque (L-cassette).33
Figure 27 – Locations and dimensions of recorded tracks .37
Figure 28 – Locations and dimensions of tolerance zones of helical track records .38
Figure 29 – Recorded control code waveform .40
Figure 30 – Overall recording block diagram .41
Figure 31 – Overall playback block diagram.42
Figure 32 – Type D-16 encoding, one coding channel.43
Figure 33 – Type D-16 encoding, two coding channels .43
Figure 34 – 1920 × 1080/PsF 4:2:2 YC C shuffle blocks .46
B R
Figure 35 – 1920 × 1080/PsF 4:4:4 RGB shuffle blocks .47
Figure 36 – 1920 × 540/I 4:2:2 YC C shuffle blocks.48
B R
Figure 37 – 1920 × 540/I 4:4:4 RGB shuffle blocks .49
Figure 38 – 1280 × 720/P 4:2:2 YC C frame shuffle blocks.49
B R
Figure 39 – 1920 × 1080/PsF 4:2:2 YC C shuffle sets .50
B R
Figure 40 – 1920 × 1080/PsF 4:4:4 RGB shuffle sets .51

– 4 – 62141  IEC:2005(E)
Figure 41 – 1920 × 1080/I 4:2:2 YC C shuffle sets .52
B R
Figure 42 – 1920 × 1080/I 4:4:4 RGB shuffle sets .53
Figure 43 – 1280 × 720/P 4:2:2 YC C shuffle sets .54
B R
Figure 44 – 1920 × 1080 4:2:2 YC C macro block unit number allocation .56
B R
Figure 45 – 1920 × 1080 4:4:4 RGB macro block unit number allocation.57
Figure 46 – 1280 × 720 4:2:2 YC C macro block unit number allocation .57
B R
Figure 47 – 1920 × 1080 ancillary data bursts.58
Figure 48 – 1280 × 720 ancillary data bursts.58
Figure 49 – Ancillary data headers.59
Figure 50 – Macro block encoding .61
Figure 51 – Basic block format.63
Figure 52 – Macro block identifier byte descriptions.64
Figure 53 – Auxiliary data time code .67
Figure 54 – 4:2:2 YC C differential DC block order .70
B R
Figure 55 – 4:4:4 RGB differential DC block order .70
Figure 56 – 4:2:2 DCT code interleave.71
Figure 57 – 4:2:2 YC C DCT macro block interleaving example.72
B R
Figure 58 – 4:4:4 DCT code interleave.72
Figure 59 – 4:4:4 RGB DCT macro block interleaving example .73
Figure 60 – 4:2:2 YC C DPCM code word interleave order .73
B R
Figure 61 – 4:2:2 YC C DPCM macro block interleaving example.74
B R
Figure 62 – 4:4:4 RGB DPCM code word interleave order.74
Figure 63 – 4:4:4 RGB DPCM macro block interleaving example .75
Figure 64 – 1920 × 1080 packing example .76
Figure 65 – 1280 × 720 packing example.76
Figure 66 – Start and end sample number of data recording mode.78
Figure 67 – Audio auxiliary data words .79
Figure 68 – Video data blocking.81
Figure 69 – Audio data blocking for each audio channel .83
Figure 70 – Audio sync block alignments on helical tracks .85
Figure 71 – General sector arrangement on helical track .86
Figure 72 – Sector and segment arrangement on helical track .88
Figure 73 – Record unit, segment, channel and track pair counts .89
Figure 74 – Video sync block format .90
Figure 75 – Audio sync block format .90
Figure 76 – Sync block identification bytes .91
Figure 77 – Sync sequence number .93
Figure A1 – System overview.98
Figure B.1 – Possible scanner configuration (29,97 Hz, 25 Hz, 24 Hz and 23,98 Hz
record unit rates) .101
Figure B.2 – Possible longitudinal head location and tape wrap (29,97 Hz, 25 Hz,
24 Hz and 23,98 Hz record unit rates).102

62141 IEC:2005(E) – 5 –
Table 1 – Tape speeds for each record unit rate .34
Table 2 – Record location and dimensions.36
Table 3 – Control track pulse widths .39
Table 4 – Data rates associated with source picture rates.42
Table 5 – 1920 × 1080 ancillary data line number ranges.44
Table 6 – 1920 × 1080 source picture rates .45
Table 7 – 1280 × 720 ancillary data line number ranges .45
Table 8 – 1280 × 720 source picture rates .45
Table 9 – Shuffle-set allocation.55
Table 10 – Pseudo-random SIZE and RANGE value .56
Table 11 – Ancillary line ID values .60
Table 12 – General coding constraints .61
Table 13 – Range for quantizer_scale_code .62
Table 14 – Coded sequence segment numbers.65
Table 15 – Auxiliary basic block data .66
Table 16 – Frame-rate flags.67
Table 17 – Ancillary data line numbers for 1920 × 1080 sources.68
Table 18 – Macro block header syntax.69
Table 19 – Packing size for each record unit rate.77
Table 20 – Sync sequence number and UL .94
Table A1 – Audio sampling clock ratios.99
Table B.1 – Parameters for a possible scanner design.100
Table B.2 – Data rate and recorded wavelength.101

– 6 – 62141  IEC:2005(E)
INTERNATIONAL ELECTROTECHNICAL COMMISSION
___________
HELICAL-SCAN DIGITAL VIDEO CASSETTE
RECORDING FORMAT USING 12,65 mm MAGNETIC TAPE
AND INCORPORATING MEPG-4 COMPRESSION –
TYPE D-16 FORMAT (TA6)
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
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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 62141 has been prepared by IEC technical committee 100: Audio,
video and multimedia systems and equipment.
The text of this standard is based on the following documents:
CDV Report on voting
100/925/CDV 100/1004/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.

62141 IEC:2005(E) – 7 –
The committee has decided that the contents of this publication will remain unchanged until
the maintenance result date indicated on the IEC web site under "http://webstore.iec.ch" in
the data related to the specific publication. At this date, the publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
A bilingual version of this publication may be issued at a later date.

– 8 – 62141  IEC:2005(E)
HELICAL-SCAN DIGITAL VIDEO CASSETTE
RECORDING FORMAT USING 12,65 mm MAGNETIC TAPE
AND INCORPORATING MEPG-4 COMPRESSION –
TYPE D-16 FORMAT (TA6)
1 Scope
This International Standard specifies the track content, format, and recording method of the
data blocks containing compressed video, AES3 audio data, and associated data which form
the helical records on 12,65 mm tape in cassettes. This standard supports recording of source
picture formats using 1920 × 1080 pixels with the 4:4:4 and 4:2:2 sampling structure specified
in SMPTE 274M at the frame rate of 23,98 Hz, 24 Hz, 25 Hz and 29,97 Hz, and using 1280 ×
720 pixels with the 4:2:2 sampling structure specified in SMPTE 296M at the frame rates of
50 Hz and 59,94 Hz (see note). This standard also supports recording of 12 channels of AES3
audio data and 3 lines of uncompressed blanking interval data. This standard includes
packetizing and shuffling operations supporting picture compression using the DCT and
DPCM encoding methods defined by ISO/IEC 14496-2 (MPEG-4 simple studio profile).
NOTE Early implementations of this standard might not comply to the frame rate of 50 Hz as specified in SMPTE
296M.
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
ISO/IEC 14496-2:2004, Information technology – Coding of audio-visual objects – Part 2 :
Visual
ITU-R Recommendation BT.709:2002, Parameter values for the HDTV standards for
production and international programme exchange
SMPTE 12M:1999, Television – Audio and Film – Time and Control Code
SMPTE 274M:2003, Television – 1920 × 1080 Scanning and Analog and Parallel Digital
Interfaces for Multiple Picture Rates
SMPTE 276M:1995, Transmission of AES-EBU Digital Audio Signals Over Coaxial Cable
SMPTE 292M:1998, Bit-Serial Digital Interface for High-Definition Television Systems
SMPTE 296 M:2001, Television – 1280 × 720 Progressive Image Sample Structure – Analog
and Digital Representation and Analog Interface
SMPTE 299M:1997, Television – 24-Bit Digital Audio Format for HDTV Bit-Serial Interface
SMPTE 372M:2002, Television – Dual Link 292M Interface for 1920 x 1080 Picture Raster
SMPTE RP 188:1999, Transmission of Time Code and Control Code in the Ancillary Data
Space of a Digital Television Data Stream
AES3-1997, Serial transmission format for two-channel linearly represented digital audio data

62141 IEC:2005(E) – 9 –
3 Terms, definitions and acronyms
3.1 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
23,98, 29,97, 59,94: When used as values of field or frame rates, exact values
are respectively: 24/1.001, 30/1.001, 60/1.001.
A 1-bit flag, fixed to ‘1’ in this format, defined in ISO/IEC
alternate_scan: 14496-2.
Basic block: The basic packing unit, comprising 4 block identifier (BID)
bytes and 226 payload bytes containing auxiliary or
compressed picture data.
BID: Block identifier bytes in each basic block, BID0 to BID3.
bits_per_pixel: A 4-bit integer, fixed to ‘10’ in this format, defined in
ISO/IEC 14496-2.
block_mean: A 10-bit unsigned integer, defined for DPCM encoding in
ISO/IEC 14496-2.
Chroma_format: A 1-bit value indicating YC C or RGB mode, defined in
B R
ISO/IEC 14496-2.
Chroma_intra_quantiser_matrix: A list of 64 8-bit unsigned integers, defined in ISO/IEC
14496-2.
Coded sequence: A group of 24 auxiliary basic blocks followed by 4080
compressed data basic blocks.
Coding channel: The MBU encoding process, producing coded sequences.
Compression_mode: A 1-bit flag indicating DCT or DPCM coding, defined in
ISO/IEC 14496-2.
dct_precision: A 2-bit integer, defined in ISO/IEC 14496-2.
dct_type: A 1-bit flag, fixed to ‘1’ in this format, defined in ISO/IEC
14496-2.
dpcm_scan_order: A 1-bit flag used in the DPCM coding, defined in ISO/IEC
14496-2.
frame_rate_code: A 4-bit integer indicating the frame rate, defined in ISO/IEC
14496-2.
intra_dc_precision: A 2-bit integer, fixed to ‘0’ in this format, defined in ISO/IEC
14496-2.
intra_quantizer_matrix: A list of 64 8-bit unsigned integers, defined in ISO/IEC
14496-2.
Macro block
A 16× 16 area of picture data, rearranged shuffle block.
Note that this block is not equivalent to the ‘macroblock’
defined for ISO/IEC14496-2.
MBU: Macro block unit, A group of 204 or 180 macro blocks, used
for rate control and packing.
q_scale_type: A 1-bit flag used in the Quantiser, defined in ISO/IEC
14496-2.
quantizer_scale_code: A 5-bit unsigned integer, defined in ISO/IEC 14496-2.
Record unit: For picture formats with 23,98 Hz, 24 Hz, 25 Hz and
29,97 Hz frame rates, equivalent to a frame, For picture
format with 50 Hz and 59,94 Hz frame rate format,
equivalent to a successive frame pair.

– 10 – 62141  IEC:2005(E)
rgb_components: A 1-bit flag indicating 4:2:2 or 4:4:4 data, defined in
ISO/IEC 14496-2.
rice_parameter: A 4-bit integer used in DPCM coding, defined in ISO/IEC
14496-2.
Sector: A data unit that includes a preamble, sync blocks and a
postamble, comprising the minimum record block in a
helical track.
Segment: A time interval that represents a field of video for I and PsF
picture formats and a frame of video for P picture formats.
A Segment has half the duration of a Record Unit.
Shuffle block
A 16 × 16 area of picture data from a field or frame.
VTR: Video Tape Recorder. A Type D-16 tape recorder in this
document.
3.2 Acronyms
For the purposes of this document, the following acronyms apply.
AUX: Auxiliary
DCT: Discrete cosine transform
DPCM: Differential pulse code odulation
ECC: Error correcting code
EOB: End of block
I: Interlace scan format
NRZ: Non return to zero
MUX: Multiplex
P: Progressive scan format
PCM: Pulse code modulation
PsF: Progressive scan format with segmented frame structure.
RU: Record unit
RS: Reed-Solomon
TC: Time code
VLC: Variable length coding
4 Environment and test conditions
Tests and measurements made on the system to check the tape track recorder 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

62141 IEC:2005(E) – 11 –
4.1 Calibration tape
Calibration tapes meeting the tolerances specified below should be made available by manu-
facturers of digital television tape recorders and players in accordance with this standard.
4.2 Record locations and dimensions
Geometrical location and dimensions of the recordings on the tape and their relative positions
with regard to timing relations of the recorded signals shall be as specified in Figure 27 and
Table 2. Tolerances shown in Table 2 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 fluctuations 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.
5.1.3 Tape thickness
The tape thickness shall have a minimum value of 10,1 µm and a maximum value of 11,3 µm.
5.1.4 Offset yield strength
The offset yield strength shall be greater than 13 N.
5.1.5 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 190 000 A/m to 240 000 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)

– 12 – 62141  IEC:2005(E)
5.2.2 Tape length and recording time
Maximum tape length and recording time are recommended as follows.
+2
S cassette: 40 min for 48 min for 50 min for 23,98 Hz
293 m m
−0
29,97 Hz RU rate 25 Hz RU rate and 24 Hz RU rates
124 min for
+2
L cassette: 148 min for 155 min for 23,98 Hz
893 m m
29,97 Hz RU rate
−0
25 Hz RU rate and 24 Hz RU rates

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 the 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.
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 a minimum depth of 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, 3 and 6 shall be closed and holes 2, 4 and 5 shall be open.
5.2.9 Reels
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.

62141 IEC:2005(E) – 13 –
The locations of the reels, when in the unlocked position, are shown in Figures 4 and 17. The
dimensions of the reels are shown in Figures 6 and 19 and the 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 min. from
datum plane Z.
5.2.9.1 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.
5.2.9.2 Extraction force
The force (F1, F2) required to pull the tape out of the reel shall not exceed 0,17 N (17 gf), as
specified in Figures 13a and 26a.
5.2.9.3 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.
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.
– 14 – 62141  IEC:2005(E)
Dimensions in millimetres
NOTE 1 These dimensions are inspected by using limit gauges.
NOTE 2 No part of the lid should protrude beyond the bottom plane of the cassette when the lid opens nor when it
closes.
NOTE 3 These dimensions should be specified on the basis of datum plane Z.
NOTE 4 Label and/or window area, shown by the hatched area, is 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)

62141 IEC:2005(E) – 15 –
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 2 – Bottom-view dimensions (S-cassette)

– 16 – 62141  IEC:2005(E)
Figure 3a – Datum areas and supporting areas

Figure 3b – Tape guides
Dimensions in millimetres
62141 IEC:2005(E) – 17 –
NOTE 1 The cross-hatched areas 10 mm in diameter are datum areas.
NOTE 2 The four supporting areas shown by the
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