Helical-scan compressed digital video cassette system using 6,35 mm magnetic tape - Format D-7 -- Part 1: VTR specifications

This part of IEC 62071 specifies the content, format and recording method of the data blocks containing video, audio, and associated data which form the helical records on 6,35 mm tape contained in cassettes as specified in SMPTE 307M. In addition, this standard specifies the content, format, and recording method for longitudinal cue and control tracks. One video channel and two independent audio channels are recorded in the digital format for 25 Mb/s VTRs and one video channel and four independent audio channels for 50 Mb/s VTRs. Each of these channels is designed to be capable of independent editing. The video channel records and reproduces a component television signal in the 525-line system with a frame frequency of 29,97 Hz (hereinafter referred to as the 525/60 system) and the 625-line system with a frame frequency of 25,00 Hz (hereinafter referred to as the 625/50 system). Prior to recording, the digital signal is be compressed to a DV-based 25 Mb/s bit stream with 4:1:1 sampling or a DV-based 50 Mb/s bit stream with 4:2:2 sampling. The standard includes the process required to decode the DV-based 25 Mb/s bit stream and 50 Mb/s bit stream into output video, audio, and data.

Videokassettensystem mit komprimierter digitaler Schrägspuraufzeichnung auf Magnetband 6,35 mm - Format D-7 -- Teil 1: VTR-Festlegungen

Système de magnétoscope numérique à cassette à balayage hélicoïdal à signal compressé utilisant une bande magnétique de 6,35 mm - Format D-7 -- Partie 1: Spécifications VTR

La CEI 62071-1:2005 spécifie le contenu, le format et la méthode d'enregistrement des blocs de données contenant des données vidéo, audio et des données associées formant les enregistrements hélicoïdaux sur les bandes de 6,35 mm contenues dans des cassettes, comme cela est spécifié dans le SMPTE 307M. Elle spécifie le contenu, le format et la méthode d'enregistrement des pistes longitudinales d'ordres et d'asservissement. La présente version bilingue (2012-11) correspond à la version anglaise monolingue publiée en 2005-10.

Digitalni videokasetni snemalni sistem z zapisovanjem s poševnimi sledmi na magnetnem traku, širokem 6,35 mm, in komprimiranjem – Format D-7 – 1. del: VTR-specifikacije (IEC 62071-1:2005)

General Information

Status
Published
Publication Date
31-Dec-2006
Withdrawal Date
31-Dec-2006
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
01-Jan-2007
Due Date
01-Jan-2007
Completion Date
01-Jan-2007

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SLOVENSKI STANDARD
SIST EN 62071-1:2007
01-januar-2007
Digitalni videokasetni snemalni sistem z zapisovanjem s poševnimi sledmi na
magnetnem traku, širokem 6,35 mm, in komprimiranjem – Format D-7 – 1. del: VTR
-specifikacije (IEC 62071-1:2005)

Helical-scan compressed digital video cassette system using 6,35 mm magnetic tape -

Format D-7 -- Part 1: VTR specifications (IEC 62071-1:2005)
Videokassettensystem mit komprimierter digitaler Schrägspuraufzeichnung auf
Magnetband 6,35 mm - Format D-7 -- Teil 1: VTR-Festlegungen (IEC 62071-1:2005)
Systeme de magnétoscope numérique a cassette a balayage hélicoidal a signal
compressé utilisant une bande magnétique de 6,35 mm - Format D-7 -- Partie 1:
Spécifications VTR (IEC 62071-1:2005)
Ta slovenski standard je istoveten z: EN 62071-1:2006
ICS:
33.160.40 Video sistemi Video systems
SIST EN 62071-1:2007 en,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN 62071-1:2007
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SIST EN 62071-1:2007
EUROPEAN STANDARD
EN 62071-1
NORME EUROPÉENNE
July 2006
EUROPÄISCHE NORM
ICS 33.160.40
English version
Helical-scan compressed digital video cassette system
using 6,35 mm magnetic tape -
Format D-7
Part 1: VTR specifications
(IEC 62071-1:2005)
Système de magnétoscope numérique à Videokassettensystem mit komprimierter
cassette à balayage hélicoïdal à digitaler Schrägspuraufzeichnung auf
signal compressé utilisant une bande Magnetband 6,35 mm -
magnétique de 6,35 mm - Format D-7
Format D-7 Teil 1: VTR-Festlegungen
Partie 1: Spécifications VTR (IEC 62071-1:2005)
(CEI 62071-1:2005)

This European Standard was approved by CENELEC on 2006-06-01. 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 and 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 62071-1:2006 E
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SIST EN 62071-1:2007
EN 62071-1:2006 - 2 -
Foreword

The text of the International Standard IEC 62071-1:2005, 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 62071-1 on 2006-06-01 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) 2007-06-01
– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2009-06-01
__________
Endorsement notice

The text of the International Standard IEC 62071-1:2005 was approved by CENELEC as a European

Standard without any modification.

In the official version, for Bibliography, the following notes have to be added for the standards indicated:

IEC 60735 NOTE Harmonized as EN 60735:1991 (not modified).
IEC 61834-1 NOTE Harmonized as EN 61834-1:1998 (not modified).
__________
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SIST EN 62071-1:2007
- 3 - EN 62071-1:2006
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
AES3 2003 AES Recommended practice for digital audio - -
engineering - Serial transmisson format for
two-channel linearly represented digital audio
data
SMPTE 12M 1999 Television, audio and film - Time and control - -
code
SMPTE 259M 1997 Television - 10-Bit 4:2:2 Component and 4fsc - -
Composite Digital Signals - Serial Digital
Interface
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SIST EN 62071-1:2007
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SIST EN 62071-1:2007
INTERNATIONAL IEC
STANDARD 62071-1
First edition
2005-10
Helical-scan compressed digital video
cassette system using 6,35 mm
magnetic tape – Format D-7 –
Part 1:
VTR specifications
 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: +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 XD
International Electrotechnical Commission
МеждународнаяЭлектротехническаяКомиссия
For price, see current catalogue
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SIST EN 62071-1:2007
– 2 – 62071-1  IEC:2005(E)
CONTENTS

FOREWORD...........................................................................................................................6

1 Scope...............................................................................................................................8

2 Normative references........................................................................................................8

3 Abbreviations and acronyms .............................................................................................8

4 Environment and test conditions .......................................................................................9

4.1 Environment ............................................................................................................9

4.2 Reference tape......................................................................................................10

4.3 Calibration tapes ...................................................................................................10

5 Tape...............................................................................................................................10

5.1 Base......................................................................................................................10

5.2 Width ....................................................................................................................10

5.3 Width fluctuation....................................................................................................10

5.4 Reference edge straightness .................................................................................10

5.5 Tape thickness ......................................................................................................11

5.6 Transmissivity .......................................................................................................11

5.7 Offset yield strength...............................................................................................11

5.8 Magnetic coating ...................................................................................................11

5.9 Coating coercivity ..................................................................................................11

6 Helical recordings ...........................................................................................................11

6.1 Tape speed ...........................................................................................................11

6.2 Sectors..................................................................................................................11

6.3 Record locations and dimensions...........................................................................11

6.4 Helical track record tolerance zones ......................................................................12

6.5 Relative positions of recorded information..............................................................12

6.6 Gap azimuth ..........................................................................................................22

7 Programme track data ....................................................................................................26

7.1 General .................................................................................................................26

7.2 Insert and track information (ITI) sector .................................................................41

7.3 Audio sector ..........................................................................................................51

7.4 Video sector ..........................................................................................................56

7.5 Subcode sector......................................................................................................60

7.6 Edit gap.................................................................................................................63

8 Audio processing ............................................................................................................64

8.1 General .................................................................................................................64

8.2 Encoding mode......................................................................................................64

8.3 Audio shuffling.......................................................................................................65

8.4 Audio auxiliary data (AAUX)...................................................................................66

8.5 Error correction code addition ................................................................................69

9 Video processing ............................................................................................................71

9.1 General .................................................................................................................71

9.2 Compressed macro block and data-sync block.......................................................71

9.3 Video auxiliary data (VAUX)...................................................................................72

9.4 Error correction code addition ................................................................................76

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SIST EN 62071-1:2007
62071-1  IEC:2005(E) – 3 –

10 Subcode processing .......................................................................................................77

10.1 General .................................................................................................................77

10.2 Subcode data ........................................................................................................77

10.3 Error correction code addition ................................................................................80

11 Longitudinal tracks..........................................................................................................81

11.1 Control track..........................................................................................................81

11.2 Cue track...............................................................................................................82

Annex A (normative) Tape tension........................................................................................83

Annex B (normative) Track pattern during insert editing........................................................84

Annex C (normative) Cross-tape track measurement technique ............................................86

Annex D (normative) Frequency characteristics of F track ...................................................89

Annex E (informative) Relationship between tape length and recording time .........................90

Annex F (informative) Block diagram of D-7 recorder............................................................91

Bibliography ..........................................................................................................................92

Figure 1 – Locations and dimensions of recorded tracks of 25 Mb/s format............................13

Figure 2 – Locations and dimensions of recorded tracks of 50 Mb/s format............................14

Figure 3 – Location of cue and control track record................................................................15

Figure 4 – Locations and dimensions of tolerance zones of helical track record of

25 Mb/s format......................................................................................................................20

Figure 5 – Locations and dimensions of tolerance zones of helical track record of

50 Mb/s format......................................................................................................................21

Figure 6 – A possible scanner configuration and tape wrap of 25 Mb/s format........................24

Figure 7 – A possible scanner configuration and tape wrap of 50 Mb/s format........................25

Figure 8 – Possible recording system configuration with digital interface port

(informative) .........................................................................................................................27

Figure 9 – Sector arrangement on helical track......................................................................27

Figure 10 – Frames and tracks (525/60 system of 25 Mb/s format) ........................................28

Figure 11 – Frames and tracks (625/50 system of 25 Mb/s format) ........................................28

Figure 12 – A frame and tracks (525/60 system of 50 Mb/s format)........................................29

Figure 13 – A frame and tracks (625/50 system of 50 Mb/s format)........................................29

Figure 14 – Frequency characteristics of tracks .....................................................................34

Figure 15 – Modulation for audio sector.................................................................................36

Figure 16 – Modulation for video sector .................................................................................37

Figure 17 – Modulation for subcode sector ............................................................................38

Figure 18 – Possible block diagram for signal processing ......................................................39

Figure 19 – Bit stream before interleaved NRZI modulation....................................................40

Figure 20 – Pre-coding..........................................................................................................40

Figure 21 – Structure of ITI sector .........................................................................................42

Figure 22 – Structure of sync block of TIA .............................................................................48

Figure 23 – Structure of audio sector.....................................................................................51

Figure 24 – Structure of sync blocks in audio sector ..............................................................52

Figure 25 – Structure of video sector .....................................................................................57

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SIST EN 62071-1:2007
– 4 – 62071-1  IEC:2005(E)

Figure 26 – Structure of sync blocks in video sector ..............................................................58

Figure 27 – Structure of subcode sector ................................................................................61

Figure 28 – Structure of sync blocks in subcode sector..........................................................62

Figure 29 – Sample to audio data bytes conversion ...............................................................65

Figure 30 – Arrangement of AAUX packs in audio auxiliary data ............................................66

Figure 31 – Data and inner parity of a data sync block ...........................................................70

Figure 32 – Data and outer parity of a data sync block for audio sector ..................................71

Figure 33 – Relation between the compressed macro block number and the data-sync block 72

Figure 34 – Arrangement.......................................................................................................73

Figure 35 – Data and outer parity of a data sync block for video sector ..................................77

Figure 36 – Arrangement of subcode data .............................................................................78

Figure 37 – Bit assignment for subcode data and parity .........................................................81

Figure 38 – Recorded control code waveform timing (525/60 system) ....................................82

Figure 39 – Recorded control code waveform timing (625/50 system) ....................................82

Figure B.1 – Typical track pattern during insert editing for 25 Mb/s format..............................84

Figure B.2 – Typical track pattern during insert editing for 50 Mb/s format..............................85

Figure C.1 – Correction factors (actual tape speed, tension) ..................................................87

Figure C.2 – Track location error plot for 25 Mb/s format (example) .......................................88

Figure C.3 – Track location error plot for 50 Mb/s format (example) .......................................88

Figure C.4 – Cross-tape measurement technique ..................................................................88

Figure D.1 – Frequency characteristics of F track ................................................................89

Figure F.1 – Block diagram of D-7 recorder ...........................................................................91

Table 1 – Record locations and dimensions (525/60 system of 25 Mb/s format) .....................16

Table 2 – Record locations and dimensions (625/50 system of 25 Mb/s format) .....................17

Table 3 – Record locations and dimensions (525/60 system of 50 Mb/s format) .....................18

Table 4 – Record locations and dimensions (625/50 system of 50 Mb/s format) .....................19

Table 5 – Parameters for a possible scanner design of 25 Mb/s format..................................23

Table 6 – Parameters for a possible scanner design of 50 Mb/s format..................................23

Table 7 – Frames and servo information (525/60 system of 25 Mb/s format) ..........................30

Table 8 – Frames and servo information (625/50 system of 25 Mb/s format) ..........................31

Table 9 – A frame and servo information (525/60 system of 50 Mb/s format)..........................32

Table 10 – A frame and servo information (625/50 system of 50 Mb/s format)........................33

Table 11 – Bit stream of ITI preamble for servo information F ..............................................42

Table 12 – Bit stream of ITI preamble for servo information F ..............................................43

Table 13 – Bit stream of ITI preamble for servo information F ..............................................44

Table 14 – Bit stream of SSA for servo information F ...........................................................45

Table 15 – Bit stream of SSA for servo information F ...........................................................46

Table 16 – Bit stream of SSA for servo information F ...........................................................47

Table 17 – Application ID of track information........................................................................48

Table 18 – Pilot frame ...........................................................................................................48

Table 19 – Bit stream of TIA for servo information F ............................................................49

Table 20 – Bit stream of TIA for servo information F ............................................................49

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SIST EN 62071-1:2007
62071-1  IEC:2005(E) – 5 –

Table 21 – Bit stream of TIA for servo information F ............................................................49

Table 22 – Bit stream of ITI post-amble for servo information F ...........................................50

Table 23 – Bit stream of ITI post-amble for servo information F ...........................................50

Table 24 – Bit stream of ITI post-amble for servo information F ...........................................50

Table 25 – ID0 in audio sector...............................................................................................53

Table 26 – Audio application ID .............................................................................................53

Table 27 – Track pair number for 25 Mb/s format ..................................................................53

Table 28 – Track pair number for 50 Mb/s format ..................................................................54

Table 29 – Bit assignment of ID codewords ...........................................................................55

Table 30 – ID data in video sector .........................................................................................59

Table 31 – Video application ID .............................................................................................60

Table 32 – ID data in subcode sector ....................................................................................62

Table 33 – Subcode application ID ........................................................................................63

Table 34 – AAUX data...........................................................................................................67

Table 35 – Mapping of AAUX source pack .............................................................................67

Table 36 – Mapping of AAUX source control pack..................................................................68

Table 37 – VAUX data...........................................................................................................74

Table 38 – Mapping of VAUX source pack .............................................................................74

Table 39 – Mapping of VAUX source control pack..................................................................75

Table 40 – Mapping of subcode pack ....................................................................................78

Table 41 – Mapping of time code pack ..................................................................................79

Table 42 – Mapping of a binary group pack ...........................................................................80

Table C.1 – Nomenclature and calculation of track location error ...........................................87

Table E.1 – Tape length and recording time...........................................................................90

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SIST EN 62071-1:2007
– 6 – 62071-1  IEC:2005(E)
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
HELICAL-SCAN COMPRESSED DIGITAL VIDEO CASSETTE SYSTEM
USING 6,35 mm MAGNETIC TAPE – FORMAT D-7 –
Part 1: VTR specifications
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,

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in the subject dealt with may participate in this preparatory work. International, governmental and non-

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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

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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 62071-1 has been prepared by technical area 6: Higher data rate

storage media, data structures and equipment of 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
100/900/CDV 100/984/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.

---------------------- Page: 12 ----------------------
SIST EN 62071-1:2007
62071-1  IEC:2005(E) – 7 –

IEC 62071 consists of the following parts, under the general title Helical-scan compressed

digital video cassette system using 6,35 mm magnetic tape – Format D-7:
Part 1: VTR specifications
Part 2: Compression format
Part 3: Data stream format

This part 1 describes the VTR specifications which are tape, magnetization, helical recording,

modulation method and basic system data for video compressed data.

Part 2 describes the specifications for encoding process and data format for 525i and 625i

systems.

Part 3 describes the specifications for transmission of DV-based compressed video and audio

data stream over 270 Mb/s and 360 Mb/s serial digital interface.

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.
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SIST EN 62
...

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