Helical-scan compressed digital video cassette system using 6,35 mm magnetic tape - Format D-7 -- Part 3: Data stream format

This part of IEC 62071 defines the format of the data stream for the synchronous exchange of DV-based audio, data, and compressed video (whose data structure is defined in SMPTE 314M) over the interface defined in SMPTE 305M. It covers the transmission of audio, subcode data and compressed video packets associated with DV-based 25 and 50 Mb/s data structures including faster-than-real-time transmission for 525/60 SDTI and 625/50 SDTI systems. This standard does not include the data stream of a DV-compressed structure as defined in SMPTE 322M. Space within SMPTE 305M not used by a data stream conforming to this standard may be used for the transmission of data other than those representing DV-based audio, data and compressed video. In this standard, the 60 Hz system refers to the field frequency 59,94 Hz system and the 50 Hz system refers to the field frequency 50,0 Hz system.

Videokassettensystem mit komprimierter digitaler Schrägspuraufzeichnung auf Magnetband 6,35 mm - Format D-7 -- Teil 3: Datenstromformat

Système de magnétoscope numérique à cassette à balayage hélicoïdal à signal compressé utilisant une bande magnétique de 6,35 mm - Format D-7 -- Partie 3: Format du flux de données

La CEI 62071-3:2005 définit le format de la suite de données pour l'échange synchrone d'audio, de données et de vidéo compressée au format vidéonumérique (dont la structure de données est définie dans la SMPTE 314M) par l'interface définie dans la SMPTE 305M. Elle traite de la transmission de paquets audio, de données de code auxiliaire et de vidéo compressée en association avec des structures au format DV (vidéonumérique) à 25 Mb/s et 50 Mb/s, notamment de la transmission plus rapide qu'en temps réel pour les systèmes SDTI 525/60 et SDTI 625/50. La présente version bilingue (2013-07) 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 – 3. del: Podatkovno-tokovni format (IEC 62071-3:2005)

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 62071-3:2007
01-januar-2007
Digitalni videokasetni snemalni sistem z zapisovanjem s poševnimi sledmi na
magnetnem traku, širokem 6,35 mm, in komprimiranjem – Format D-7 – 3. del:
Podatkovno-tokovni format (IEC 62071-3:2005)

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

Format D-7 -- Part 3: Data stream format (IEC 62071-3:2005)
Videokassettensystem mit komprimierter digitaler Schrägspuraufzeichnung auf
Magnetband 6,35 mm - Format D-7 -- Teil 3: Datenstromformat (IEC 62071-3:2005)
Systeme de magnétoscope numérique a cassette a balayage hélicoidal a signal

compressé utilisant une bande magnétique de 6,35 mm - Format D-7 -- Partie 3: Format

du flux de données (IEC 62071-3:2005)
Ta slovenski standard je istoveten z: EN 62071-3:2006
ICS:
33.160.40 Video sistemi Video systems
SIST EN 62071-3:2007 en,de

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

---------------------- Page: 1 ----------------------
SIST EN 62071-3:2007
---------------------- Page: 2 ----------------------
SIST EN 62071-3:2007
EUROPEAN STANDARD
EN 62071-3
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 3: Data stream format
(IEC 62071-3:2005)
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 3: Datenstromformat
Partie 3: Format du flux de données (IEC 62071-3:2005)
(CEI 62071-3:2005)

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 62071-3:2006 E
---------------------- Page: 3 ----------------------
SIST EN 62071-3:2007
EN 62071-3:2006 - 2 -
Foreword

The text of the International Standard IEC 62071-3:2005, 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 62071-3 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 62071-3:2005 was approved by CENELEC as a European

Standard without any modification.
__________
---------------------- Page: 4 ----------------------
SIST EN 62071-3:2007
- 3 - EN 62071-3:2006
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
SMPTE 305M 2005 Television – Serial Data Transport Interface - -
SMPTE 314M 2004 Television – Data Structure for DV-Based - -
Audio, Data and Compressed Video – 25 and
50 Mb/s
SMPTE 322M 2004 Television – Format for Transmission of DV - -
Compressed Video, Audio and Data Over a
Serial Data Transport Interface
---------------------- Page: 5 ----------------------
SIST EN 62071-3:2007
---------------------- Page: 6 ----------------------
SIST EN 62071-3:2007
INTERNATIONAL IEC
STANDARD 62071-3
First edition
2005-10
Helical-scan compressed digital video
cassette system using 6,35 mm
magnetic tape – Format D-7 –
Part 3:
Data stream 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: +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 T
International Electrotechnical Commission
МеждународнаяЭлектротехническаяКомиссия
For price, see current catalogue
---------------------- Page: 7 ----------------------
SIST EN 62071-3:2007
– 2 – 62071-3  IEC:2005(E)
CONTENTS

1 Scope...............................................................................................................................5

2 Normative references........................................................................................................5

3 Abbreviations and acronyms .............................................................................................5

4 Identification within the serial data transport interface (SDTI) ............................................6

4.1 SDTI header packet data .........................................................................................6

4.2 Payload ...................................................................................................................6

5 Stream block format .........................................................................................................6

5.1 Reserved data words ...............................................................................................7

5.2 Signal type words ....................................................................................................7

5.3 Transmission type word ...........................................................................................9

5.4 DIF block ID words ................................................................................................10

5.5 DIF block data words .............................................................................................10

5.6 Error correction code (ECC) words.........................................................................10

6 Transmission order .........................................................................................................11

7 Mapping structure ...........................................................................................................14

7.1 Channel unit ..........................................................................................................14

7.2 Mapping rules........................................................................................................14

Annex A (informative) Block diagram of D-7 recorder............................................................23

Figure 1 – Stream block format ...............................................................................................7

Figure 2 – Signal type (ST) word mapping ...............................................................................7

Figure 3 – Transmission type (TT) word mapping ....................................................................9

Figure 4 – Mapping of DIF block ID .......................................................................................10

Figure 5 – Mapping of ECC ...................................................................................................11

Figure 6 – Transmission order in one frame for the 50 Mb/s structure ....................................12

Figure 7 – Transmission order in one frame for the 25 Mb/s structure ....................................12

Figure 8 – Transmission order in a DIF sequence..................................................................13

Figure 9 – Channel unit mapping for the 25 Mb/s structure (525/60 SDTI system) ..................16

Figure 10 – Channel unit mapping for the 25 Mb/s structure (625/50 SDTI system) ...............17

Figure 11 – Channel unit mapping in a synchronized multichannel units transmission

(525/60 SDTI system) ...........................................................................................................19

Figure 12 – Channel unit mapping in a synchronized multichannel units transmission

(625/50 SDTI system) ...........................................................................................................20

Figure 13 – Channel unit mapping for the 50 Mb/s structure (525/60 SDTI system) ................21

Figure 14 – Channel unit mapping for the 50 Mb/s structure (625/50 SDTI system) ................22

Figure A.1 – Block diagram of D-7 recorder ...........................................................................23

Table 1 – Start lines of channel units.....................................................................................18

---------------------- Page: 8 ----------------------
SIST EN 62071-3:2007
62071-3  IEC:2005(E) – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
HELICAL-SCAN COMPRESSED DIGITAL VIDEO CASSETTE SYSTEM
USING 6,35 mm MAGNETIC TAPE – FORMAT D-7 –
Part 3: Data stream format
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 62041-3 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
100/902/CDV 100/986/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: 9 ----------------------
SIST EN 62071-3:2007
– 4 – 62071-3  IEC:2005(E)

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

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

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.

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 bililngual version of this publication may be issued at a later date.
---------------------- Page: 10 ----------------------
SIST EN 62071-3:2007
62071-3  IEC:2005(E) – 5 –
HELICAL-SCAN COMPRESSED DIGITAL VIDEO CASSETTE SYSTEM
USING 6,35 mm MAGNETIC TAPE – FORMAT D-7
Part 3: Data stream format
1 Scope

This part of IEC 62071 defines the format of the data stream for the synchronous exchange of

DV-based audio, data, and compressed video (whose data structure is defined in SMPTE 314M)

over the interface defined in SMPTE 305M. It covers the transmission of audio, subcode data

and compressed video packets associated with DV-based 25 and 50 Mb/s data structures

including faster-than-real-time transmission for 525/60 SDTI and 625/50 SDTI systems.

This standard does not include the data stream of a DV-compressed structure as defined in

SMPTE 322M.

Space within SMPTE 305M not used by a data stream conforming to this standard may be used

for the transmission of data other than those representing DV-based audio, data and

compressed video.

In this standard, the 60 Hz system refers to the field frequency 59,94 Hz system and the 50 Hz

system refers to the field frequency 50,0 Hz system.
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.
SMPTE 305M: 2005, Television – Serial Data Transport Interface

SMPTE 314M: 1999, Television – Data Structure for DV-Based Audio, Data and Compressed

Video – 25 and 50 Mb/s

SMPTE 322M: 2004, Television – Format for Transmission of DV Compressed Video, Audio

and Data Over a Serial Data Transport Interface
3 Abbreviations and acronyms
DIF: Digital interface
DVF: DIF valid flag
ECC: Error correction code
FF: Field/frame frequency flag
FSNF: Frame sequence number flag
SDI: Serial digital interface
SDTI: Serial data transport interface
ST: Signal type
STVF: Signal type of video frame
TRF: Transmission rate flag
TT: Transmission type
---------------------- Page: 11 ----------------------
SIST EN 62071-3:2007
– 6 – 62071-3  IEC:2005(E)
4 Identification within the serial data transport interface (SDTI)
4.1 SDTI header packet data

The header packet data words of the serial data transport interface (SDTI) associated with this

data stream format shall conform to SMPTE 305M. When the SDTI interface is transporting a

data stream conforming to this standard, the block type word within the SDTI header packet

shall have the value 173 for transported data contained in fixed-size blocks when ECC (error

correction code) is used and the value
233 when ECC is not used.
4.2 Payload

The payload is composed of consecutive fixed-size blocks (see Figure 1). The SDTI data type

word shall identify the data type of this payload with the value 221 .
5 Stream block format

The stream block format is shown in Figure 1. The length of each stream block is 170 words,

including a secondary header, two DIF (digital interface) block IDs, two DIF block data (of

stream data) and an ECC block. The secondary header contains reserved data words, signal

type words, and a transmission type word. The complete word structure of the stream block for

a compressed video data stream is defined below:
Reserved data : 3 words
Signal type : 2 words
Transmission type : 1 word
DIF block ID : 3 words
DIF block data : 77 words
DIF block ID : 3 words
DIF block data : 77 words
ECC : 4 words
---------------------- Page: 12 ----------------------
SIST EN 62071-3:2007
62071-3  IEC:2005(E) – 7 –
Ancillary data Payload
Fixed Fixed Fixed Fixed
Header
A Space Space
block block block block
Data
170 words
1 word
SDTI
data
Stream block
type
( from SMPTE 305M, table 2)
Word 0 1 2 3 4 5 6 7 8 9 85 86 87 88 89 169
DIF DIF DIF DIF
Reserved
ST TT block block block block ECC
data
ID data ID data
(3 words) (3 words) (77 words) (3 words) (77 words) (4 words)
Signal type Transmission type
(2 words) (1 words)
IEC 1941/05
Figure 1 – Stream block format
5.1 Reserved data words

The reserved data words shall consist of 3 words and be positioned at the start of the stream

block. The default value for the reserved data is 200 .
5.2 Signal type words

The signal type word (ST) mapping is shown in Figure 2. The signal type words shall consist of

two words. The first word of ST (word 3) includes the specific type of video frame ID (STVF ID).

The second word of ST (word 4) includes the field/frame frequency flag (FF), the DIF structure

format, the DIF valid flag (DVF), the frame sequence number flag (FSNF), the transmission

rate flag (TRF) and reserved bits.
B9 B8 B7 B6 B5 B4 B3 B2 B1 B0
Reserved
Word 3 EP EP
STVF ID
EP EP s
Word 4 FF DIF structure Re DVF FSNF TRF
IEC 1942/05
Figure 2 – Signal type (ST) word mapping
---------------------- Page: 13 ----------------------
SIST EN 62071-3:2007
– 8 – 62071-3  IEC:2005(E)
Word 3 of ST

The STVF ID shows information mainly related to pictures that have been 3:2 pull-down

converted from 480 line/ 29,98 frame rate progressive pictures.
In the 525/60 SDTI system, the following applies:

Bits B7 through B3 are reserved bits and shall be set to 00000 as default values.

Bits B2 through B0 indicate the specific type of video frame ID which shows the type of the

converted picture with the following values:
B2 B1 B0 Original Converted
0 0 0 : 480i / 29,97 -> No change
0 0 1 : 480p / 29,97 -> Segmented frame (see note)
0 1 0 : 480p / 23,98 -> No field sequence ID (3:2 pull down)
0 1 1 : 480p / 23,98 -> A frame (3:2 pull down)
1 0 0 : 480p / 23,98 -> B frame (3:2 pull down)
1 0 1 : 480p / 23,98 -> C frame (3:2 pull down)
1 1 0 : 480p / 23,98 -> D frame (3:2 pull down)
1 1 1 : 480p / 23,98 -> E frame (3:2 pull down)

NOTE Odd lines of 480p/29,97 are mapped to the first field and even lines of 480p/29,97 are mapped to the

second field.
In the 625/50 SDTI system, the following applies:
All values of bits B7 through B0 are set to 00 as default values.
Bit B8 of word 3 is equal to the even parity of B7 through B0.
Bit B9 of word 3 is equal to the complement of B8.
Word 4 of ST

Bit B7 indicates the field frequency of serial digital interface (SDI) with the following values:

B7
0 : 60 Hz (59,94 Hz)
1 : 50 Hz
Bits B6 through B4 indicate the DIF structure with the following values:
B6 B5 B4
0 0 0 : Reserved
0 0 1 : Reserved
0 1 0 : Reserved
0 1 1 : 25 Mb/s structure
1 0 0 : Reserved
1 0 1 : 50 Mb/s structure
1 1 0 : Reserved
1 1 1 : Reserved
Bit B3 is reserved bit and shall be set to 0 as default value.
---------------------- Page: 14 ----------------------
SIST EN 62071-3:2007
62071-3  IEC:2005(E) – 9 –

Bit B2 is the DIF valid flag (DVF) and indicates the validity of the DIF data mapped into SDTI.

B2
0 : invalid
1 : valid

Bit B1 is the frame sequence number flag (FSNF) and indicates the validity of the frame

sequence number (see 5.3) with the following values:
B1
0 : valid
1 : invalid

Bit B0 is the transmission rate flag (TRF) and indicates the validity of the transmission rate

(see 5.3) with the following values:
B0
0 : valid
1 : invalid
Bit B8 is equal to the even parity of B7 through B0.
Bit B9 is equal to the complement of B8.
5.3 Transmission type word

The transmission type word (TT) mapping is shown in Figure 3. The transmission type word

shall consist of one word including the frame sequence number and the transmission rate.

B9 B8 B7 B6 B5 B4 B3 B2 B1 B0
Frame sequence Transmission
Word 5 EP EP
rate
number
IEC 1943/05
Figure 3 – Transmission type (TT) word mapping
Bits B7 through B4 indicate the frame sequence number with the following values:
0 : 1
1 : 2
|
Fh : 16
The frame sequence number identifies frames multiplexed within an SDTI frame.
Bits B3 through B0 indicate the transmission rate with the following values:
0 : 1 x (normal transmission rate) (see note)
1 : 2 x
2 : 3 x
3 : 4 x
4 : 5 x
5 : 6 x
6 : 7 x
7 : 8 x
8 – E : reserved
h h
F : 16 x
---------------------- Page: 15 ----------------------
SIST EN 62071-3:2007
– 10 – 62071-3  IEC:2005(E)

NOTE The multiple of the normal transmission rate is represented by x. The normal transmission rate

corresponding to normal reproduction of the television picture is 1 x.
Bit B8 is equal to the even parity of B7 through B0;
Bit B9 is equal to the complement of B8.
5.4 DIF block ID words

The DIF block ID (ID0-2) shall consist of three words, contained in bits A23 through A0 as

shown in Figure 4. The lower 8-bit portion of these three words is specified in SMPTE 314M.

B9 B8 B7 B6 B5 B4 B3 B2 B1 B0
Word 6 and 86
EP1 EP1 A7 A6 A5 A4 A3 A2 A1 A0
Word 7 and 87 EP2 EP2 A15 A14 A13 A12 A11 A10 A9 A8
Word 8 and 88 EP3 EP3 A23 A22 A21 A20 A19 A18 A17 A16
IEC 1944/05
Figure 4 – Mapping of DIF block ID
EP1 is equal to the even parity of bits A7 through A0;
EP2 is equal to the even parity of bits A15 through A8;
EP3 is equal to the even parity of bits A23 through A16;
and
EP1 is equal to the complement of EP1;
EP2 is equal to the complement of EP2;
EP3 is equal to the complement of EP3.
5.5 DIF block data words

The DIF block data shall consist of 77 words. The lower 8 bits of each DIF block word

represent the DIF block data, as specified in SMPTE 314M; the higher 2 bits are parity data.

Bits B7 through B0 are DIF block data; Bit B8 is equal to the even parity of B7 through B0;

Bit B9 is equal to the complement of B8.
5.6 Error correction code (ECC) words

Bits B7 through B0 of the words within a stream block (including reserved data words, the ST

word, the TT word and all words of the DIF block ID and DIF block data) are optionally

protected by an error correction code (ECC). The ECC shall consist of four words and be

inserted at the end of the stream block.

The error correction code is a (170,166) Reed-Solomon code in GF(256), whose field generator

polynomial is shown as:
8 4 3 2
P(x) = X + X + X + X + 1
where X are place-keeping variables in GF(2), the binary field.
The generator polynomial of the code in GF(256) is:
---------------------- Page: 16 ----------------------
SIST EN 62071-3:2007
62071-3  IEC:2005(E) – 11 –
2 3 4
G(x) = (x+α)(x+α )(x+α )(x+α )
where α is given by 2 in GF(256).

When the value of the block type in the SDTI header (see 4.1) is 173 , the Reed-Solomon code

shall be contained in C31 through C0 as shown in Figure 5. When the value of the block type is

233 , the ECC shall have the fixed value 200 .
h h
B9 B8 B7 B6 B5 B4 B3 B2 B1 B0
Word 166
EP1 EP1 C7 C6 C5 C4 C3 C2 C1 C0
Word 167
EP2 EP2 C15 C14 C13 C12 C11 C10 C9 C8
Word 168 EP3 EP3 C23 C22 C21 C20 C19 C18 C17 C16
Word 169 EP4 EP4 C31 C30 C29 C28 C27 C26 C25 C24
IEC 1945/05
Figure 5 – Mapping of ECC
EP1 is equal to the even parity of bits C7 through C0;
EP2 is equal to the even parity of bits C15 through C8;
EP3 is equal to the even parity of bits C23 through C16;
EP4 is equal to the even parity of bits C31 through C24;
and
EP1 is equal to the complement of EP1;
EP2 is equal to the complement of EP2;
EP3 is equal to the complement of EP3;
EP4 is equal to the complement of EP4.
6 Transmission order

The transmission order within one frame for 25 and 50 Mb/s DV-based compression structures

consisting of DIF blocks is shown in Figures 6, 7, and 8.

In the 50 Mb/s structure, each frame is carried in two channels, which are transmitted in

sequence one after another. In the 25 Mb/s structure, only a single channel is used.

Each channel consists of 10 DIF sequences in the 60 Hz system or 12 DIF sequences in the

50 Hz system. DIF sequences within a frame are transmitted in a DIF sequence order from 0 to

n-1. Each DIF sequence is composed of 150 DIF blocks. DIF blocks within a DIF sequence are

transmitted sequentially from DIF block 0 to 149.
---------------------- Page: 17 ----------------------
SIST EN 62071-3:2007
– 12 – 62071-3  IEC:2005(E)
Data in one frame
First channel Second channel
DIF sequences

DIF Sequence 1,0 DIF sequence n-1,0 DIF sequence 0,1 DIF sequence 1,1 DIF sequence n-1,1

DIF sequence 0,0
DIF sequence number FSC
Structure of a DIF
Header section Subcode section VAUX section Audio & video section
sequence
Transmission order
H0,0 SC0,0 SC1,0 VA0,0 VA1,0 VA2,0 A0,0 V 0,0 V132,0 V133,0 V134,0
DIF blocks
Byte position number DIF block number FSC
0 1 2 3 - - - - - - - - - - - - - - - - - - - - - - - 79
Note
Structure of a DIF block ID Data
n = 10 for 525/60 system
n = 12 for 625/50 system
FSC : First/second channel
IEC 1946/05
Figure 6 – Transmission order in one frame for the 50 Mb/s structure
Data in one frame
DIF sequences
DIF sequence 0,0 DIF sequence 1,0 DIF sequence n-1,0
DIF sequence number FSC
Structure of a DIF
Header section Subcode section VAUX section Audio & video section
sequence
Transmission order
DIF blocks H0,0 SC0,0 SC1,0 VA0,0 VA1,0 VA2,0 A0,0 V 0,0 V132,0 V133,0 V134,0
Byte position number DIF block number FSC
0 1 2 3 - - - - - - - - - - - - - - - - - - - - - - - 79
Note
Structure of a DIF block
ID Data
n = 10 for 525/60 system
n = 12 for 625/50 system
FSC : First/second channel
IEC 1947/05
Figure 7 – Transmission order in one frame for the 25 Mb/s structure
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SIST EN 62071-3:2007
62071-3  IEC:2005(E) – 13 –
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DDDIIIFFF bloc bloc blockkksss H0H0H0,i,i,i SC0SC0SC0,,,iii SSSC1C1C1,i,i,i VAVAVA000,,,iii VA1VA1VA1,,,iii VA2VA2VA2,i,i,i

AAA000,i,i,i V0V0V0,,,iii V1V1V1,i,i,i V2V2V2,,,iii V3V3V3,,,iii V4V4V4,i,i,i V5V5V5,,,iii V6V6V6,,,iii V7

...

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