IEC 61834-3:1999

Recording - Helical-scan digital video cassette recording system using 6,35 mm magnetic tape for consumer use (525-60, 625-50, 1125-60 and 1250-50 systems) - Part 3: HD format for 1125-60 and 1250-50 systems

Establishes basic principles applicable to the next generation of digital video cassette recording systems for consumer use for the interest of both users and manufacturers. Specifies the content, format and recording method of the data blocks forming the helical records on the tape containing audio, video, and system data. Describes the specifications for the 1125-line system with a frame frequency of 30,00 Hz and the 1250-line system with a frame frequency of 25,00 Hz.

Enregistrement - Systèmes de magnétoscopes numériques à cassette à balayage hélicoïdal sur bande magnétique de 6,35 mm pour usage grand public (systèmes 525-60, 625-50, 1125-60 et 1250-50) - Partie 3: Format HD pour systèmes 1125-60 et 1250-50

Établit les principes fondamentaux s'appliquant à la future génération des magnétoscopes numériques à cassette à usage grand public, dans l'intérêt à la fois des consommateurs et des fabriquants. Spécifie le contenu, le format et la méthode d'enregistrement des blocs de données constituant les enregistrements hélicoïdaux sur les bandes contenant les données audio, vidéo et celles du système. Donne les spécifications des systèmes à 1125 lignes à la fréquence d'image de 30,00 Hz et celles des systèmes à 1250 lignes à la fréquence de l'image de 25,00 Hz.

General Information

• Status: Published
• Publication Date: 03-Nov-1999
• ICS: 33.160.40 - Video systems
• Technical Committee: TC 100 - Audio, video and multimedia systems and equipment
• Drafting Committee: WG 3 - TC 100/WG 3
• Current Stage: PPUB - Publication issued
• Start Date: 15-Dec-1999
• Completion Date: 04-Nov-1999

Standards Content (Sample)

INTERNATIONAL IEC
STANDARD
61834-3
First edition
1999-11
Recording – Helical-scan digital video cassette
recording system using 6,35 mm magnetic tape for
consumer use
(525-60, 625-50, 1125-60 and 1250-50 systems)
Part 3:
HD format for 1125-60 and 1250-50 systems
Système de magnétoscope numérique à cassette à balayage
hélicoïdal sur bande magnétique de 6,35 mm pour usage
grand public
(systèmes 525-60, 625-50, 1125-60 et 1250-50) –
Partie 3:
Format HD pour les systèmes 1125-60 et 1250-50
Reference number
Numbering
As from 1 January 1997 all IEC publications are issued with a designation in the
60000 series.
Consolidated publications
Consolidated versions of some IEC publications including amendments are
available. For example, 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.
Validity of this publication
The technical content of IEC publications is kept under constant review by the IEC,
thus ensuring that the content reflects current technology.
Information relating to the date of the reconfirmation of the publication is available
in the IEC catalogue.
Information on the subjects under consideration and work in progress undertaken
by the technical committee which has prepared this publication, as well as the list
of publications issued, is to be found at the following IEC sources:
• IEC web site*
• Catalogue of IEC publications
Published yearly with regular updates
(On-line catalogue)*
• IEC Bulletin
Available both at the IEC web site* and as a printed periodical
Terminology, graphical and letter symbols
For general terminology, readers are referred to IEC 60050: International
Electrotechnical Vocabulary (IEV).
For graphical symbols, and letter symbols and signs approved by the IEC for
general use, readers are referred to publications IEC 60027: Letter symbols to be
used in electrical technology, IEC 60417: Graphical symbols for use on equipment.
Index, survey and compilation of the single sheets and IEC 60617: Graphical symbols
for diagrams.
* See web site address on title page.

INTERNATIONAL IEC
STANDARD
61834-3
First edition
1999-11
Recording – Helical-scan digital video cassette
recording system using 6,35 mm magnetic tape for
consumer use
(525-60, 625-50, 1125-60 and 1250-50 systems)
Part 3:
HD format for 1125-60 and 1250-50 systems
Système de magnétoscope numérique à cassette à balayage
hélicoïdal sur bande magnétique de 6,35 mm pour usage
grand public
(systèmes 525-60, 625-50, 1125-60 et 1250-50) –
Partie 3:
Format HD pour les systèmes 1125-60 et 1250-50
 IEC 1999  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 Geneva, Switzerland
Telefax: [phone] e-mail: [e-mail] IEC web site http://www.iec.ch
Commission Electrotechnique Internationale
PRICE CODE
XB
International Electrotechnical Commission
For price, see current catalogue

– 2 – 61834-3 © IEC:1999(E)
CONTENTS
Page
FOREWORD . 5
Clause
1 General. 7
1.1 Scope . 7
1.2 Normative references. 7
1.3 Definitions, symbols and abbreviations . 7
1.4 Environment and test conditions. 8
1.5 Reference tape . 8
1.6 Calibration tape. 8
2 Helical recordings . 8
2.1 Tape speed. 8
2.2 Record location and dimensions . 8
3 Programme track data arrangement . 9
3.1 Introduction. 9
3.2 Labelling convention. 9
3.3 Audio sector. 9
3.4 Video sector. 9
3.5 Subcode sector . 9
4 Audio interface. 9
5 Video interface. 9
6 Audio signal processing. 10
6.1 Introduction. 10
6.2 Error correction code. 10
6.3 Randomization pattern . 10
6.4 Audio encoding . 10
6.5 Audio channel allocation. 10
6.6 Frame structure . 11
6.7 Shuffling method . 12
6.8 Audio auxiliary data (AAUX) . 14
6.9 Invalid recording . 14
7 Video signal processing. 14
7.1 Introduction. 14
7.2 Error correction code. 14
7.3 Randomization pattern . 14
7.4 Video structure. 14
7.5 DCT processing . 18
7.6 Quantization. 18
7.7 Variable length coding (VLC). 19
7.8 Arrangement of a compressed macro block . 19
7.9 Arrangement of a video segment . 20
7.10 Data-sync block and compressed macro block . 22
7.11 Video auxiliary data (VAUX) . 22
7.12 Invalid recording . 22

61834-3 © IEC:1999(E) – 3 –
8 Subcode signal processing. 22
8.1 The recording periods of TAG ID . 22
8.2 The writing method of the optional area . 23
8.3 The rewriting periods of TAG ID . 23
9 System data . 23
9.1 AAUX. 23
9.2 VAUX. 24
9.3 Subcode . 25
9.4 MIC. 25
10 Data structure for digital interface. 25
10.1 Introduction. 25
10.2 Data structure . 25
10.3 DIF sequence. 26
10.4 DIF block . 26
10.5 Frame period . 28
10.6 Playback speed. 28
Annex A (normative) 20 bits audio for professional use . 57
A.1 Channel allocation. 57
A.2 Encoding mode . 57
A.3 Audio error code . 57
A.4 Shuffling method . 57
Annex B (informative) Manufacturers . 61
B.1 Reference tape . 61
B.2 Calibration tape. 61
B.3 Purchase . 61
Figure 1 – Sector arrangement on helical track (1125-60 and 1250-50 systems). 30
Figure 2 – 1125-60 system . 30
Figure 3 – 1250-50 system . 31
Figure 4 – Transmitting samples for 1125-60 system. 37
Figure 5 – Transmitting samples for 1250-50 system. 38
Figure 6 – DCT block and the pixel coordinates . 38
Figure 7 – DCT block arrangement . 39
Figure 8 – Macro block and DCT block order . 39
Figure 9 – Arrangement of macro blocks for 1125-60 system . 40
Figure 10 – Super blocks and macro blocks in a frame on TV screen for 1125-60 system. 41
Figure 11 – Super blocks and macro blocks in a frame on TV screen for 1250-50 system. 42
Figure 12 – Macro block order in a super block . 43
Figure 13 – Area number . 43
Figure 14 – The arrangement of a compressed macro block . 44
Figure 15 – The arrangement of a video segment after bit-rate reduction . 45
Figure 16 – The relation between the compressed macro block number and
the data-sync block. 46
Figure 17 – Main area and optional area (1125-60 system) . 47
Figure 18 – Main area and optional area (1250-50 system) . 48

– 4 – 61834-3 © IEC:1999(E)
Page
Figure 19 – Data structure for transmission. 50
Figure 20 – Transmission order of DIF blocks in a DIF sequence . 51
Figure 21 – ID data in a DIF block. 52
Figure 22 – Data in the header section. 52
Figure A.1 –Sample to data bytes conversion for 20 bits . 60
Table 1 – Record location and dimensions (1125-60 system, 1250-50 system) . 28
Table 2 – Sector location from SSA (1125-60 system, 1250-50 system) . 29
Table 3 – Scanner example (1125-60 system, 1250-50 system) . 29
Table 4 – Sequence number (1125-60 and 1250-50 systems) . 31
Table 5 – Track pair number (1125-60 system) . 31
Table 6 – Track pair number (1250-50 system) . 32
Table 7 – Construction of an audio block . 32
Table 8 –Basic channel allocation rule in multi-stereo audio . 33
Table 9 –Channel allocation rule for lumped audio . 34
Table 10 – The number of audio samples per frame (unlocked mode) . 35
Table 11 – The allowance range of the accumulated difference value between the numbers
of audio samples per frame in synchronous channels. 35
Table 12 –The number of audio samples per frame (locked mode). 35
Table 13 – The construction of video signal sampling (12:4:4). 36
Table 14 – An example of the classification for reference. 43
Table 15 – Quantization step . 44
Table 16 – AAUX data of the main area . 49
Table 17 – VAUX data of the main area . 49
Table 18 – TIA data in the header section . 53
Table 19 – DIF blocks and subcode sync blocks . 53
Table 20 – DIF blocks and VAUX data-sync blocks . 54
Table 21 – DIF blocks and audio data-sync blocks . 55
Table 22 – DIF blocks and compressed macro blocks . 56
Table A.1 – Basic channel allocation rule . 60

61834-3 © IEC:1999(E) – 5 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
–––––––––––––
RECORDING – HELICAL-SCAN DIGITAL VIDEO CASSETTE RECORDING
SYSTEM USING 6,35 mm MAGNETIC TAPE FOR CONSUMER USE
(525-60, 625-50, 1125-60 and 1250-50 systems) –
Part 3: HD format for 1125-60 and 1250-50 systems
FOREWORD
1) The IEC (International Electrotechnical Commission) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of the 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, the IEC publishes International Standards. 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. The 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 the 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 National Committees.
3) The documents produced have the form of recommendations for international use and are published in the form
of standards, technical specifications, technical reports or guides and they are accepted by the National
Committees in that sense.
4) In order to promote international unification, IEC National Committees undertake to apply IEC International
Standards transparently to the maximum extent possible in their national and regional standards. Any
divergence between the IEC Standard and the corresponding national or regional standard shall be clearly
indicated in the latter.
5) The IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any
equipment declared to be in conformity with one of its standards.
6) Attention is drawn to the possibility that some of the elements of this International Standard may be the subject
of patent rights. The IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 61834-3 has been prepared by subcommittee 100B: Audio, video
and multimedia information storage systems, of IEC technical committee 100: Audio, video and
multimedia systems and equipment.
The text of this standard is based on the following documents:
FDIS Report on voting
100B/233/FDIS 100B/245/RVD
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 3.

– 6 – 61834-3 © IEC:1999(E)
IEC 61834 consists of the following parts, under the general title Recording – Helical-scan
digital video cassette recording system using 6,35 mm magnetic tape for consumer use
(525-60, 625-50, 1125-60 and 1250-50 systems)
– Part 1: General specifications;
– Part 2: SD format for 525-60 and 625-50 systems;
– Part 3: HD format for 1125-60 and 1250-50 systems;
– Part 4: The pack header table and the contents;
– Part 5: The character information system.
The basic principles and rules of this part 3 are based on the set of specifications to be
adopted by the HD Digital VCR Conference.
This part 3 describes the helical-scan digital video cassette recording system using 6,35 mm
magnetic tape for consumer use.
Part 1 describes the common specifications for the helical-scan digital video cassette recording
system using 6,35 mm magnetic tape.
Part 2 describes the specifications for 525-60 and 625-50 systems which are not included in
part 1.
Part 4 describes the pack header table and the contents of packs which are applicable to the
whole recording system of helical-scan digital video cassette.
Part 5 describes the character information system which is applicable to the whole recording
system of helical-scan digital video cassette.
For manufacturing SD digital video cassette recording systems, parts 1, 2, 4 and 5 are referred
to.
For manufacturing HD digital video cassette recording systems, parts 1, 2, 3, 4 and 5 are
referred to.
Annex A forms an integral part of this standard.
Annex B is for information only.
The committee has decided that this publication remains valid until 2004. At this date, in
accordance with the committee’s decision, the publication will be
reconfirmed;
withdrawn;
replaced by a revised edition, or
amended.
A bilingual version of this standard may be issued at a later date.

61834-3 © IEC:1999(E) – 7 –
RECORDING – HELICAL-SCAN DIGITAL VIDEO CASSETTE RECORDING
SYSTEM USING 6,35 mm MAGNETIC TAPE FOR CONSUMER USE
(525-60, 625-50, 1125-60 and 1250-50 systems) –
Part 3: HD format for 1125-60 and 1250-50 systems
1 General
1.1 Scope
The main object of this part of IEC 61834 is to establish basic principles applicable to the next
generation of digital video cassette recording systems for consumer use for the interest of both
users and manufacturers.
This part of IEC 61834 specifies the content, format and recording method of the data
blocks forming the helical records on the tape containing audio, video, and system data. It
describes the specifications for the 1125-line system with a frame frequency of 30,00 Hz
(hereinafter referred to as the "1125-60 system") and the 1250-line system with a frame
frequency of 25,00 Hz (hereinafter referred to as the "1250-50 system") which are not included
in parts 1 and 2. One video channel and four independent audio channels are recorded in the
digital format. Each of these channels is designed to be capable of independent editing.
The video channel records and reproduces a component television signal in the 1125-60 and
1250-50 systems.
In part 3, the data structure of a track is defined by APT = 000b which consists of four areas as
described in 4.3.2 in part 1 and AP1 = AP2 = AP3 = 000b. The data structure of MIC is the
same as clause 10 in IEC 61834-2.
1.2 Normative references
The following normative documents contain provisions which, through reference in this text,
constitute provisions of this part of IEC 61834. For dated references, subsequent amendments
to, or revisions of, any of these publications do not apply. However, parties to agreements
based on this part of IEC 61834 are encouraged to investigate the possibility of applying the
most recent editions of the normative documents indicated below. For undated references, the
latest edition of the normative document referred to applies. Members of IEC and ISO maintain
registers of currently valid International Standards.
IEC 61834-2:1998, Recording – Helical-scan digital video cassette recording system using
6,35 mm magnetic tape for consumer use (525-60, 625-50, 1125-60 and 1250-50 systems) –
Part 2: SD format for 525-60 and 625-50 systems
ITU-R Recommendation BT.709-3:1998, Parameter values for the HDTV standards for
production and international programme exchange
ITU-R Recommendation BS.775-1:1993, Multi-channel stereophonic sound systems with and
without accompanying picture
1.3 Definitions, symbols and abbreviations
None
– 8 – 61834-3 © IEC:1999(E)
1.4 Environment and test conditions
Tests and measurements made on the system to check the requirements of this standard shall
be carried out under the following conditions.
– Temperature: 20 °C ± 1 °C;
– Relative humidity: (50 ± 2) %;
– Barometric pressure: from 86 kPa to 106 kPa;
– Tape conditioning: not less than 24 h.
1.5 Reference tape
Blank tape to be used for calibration recordings may be purchased from the manufacturers
given in annex B.
1.6 Calibration tape
Manufacturers of video tape recorders designed for this format specification may sell
calibration tapes meeting the following requirements.
1.6.1 Record locations and dimensions
Tolerances shown in tables 1 and 2 should be reduced by 50 %.
1.6.2 Calibration signals
Test signals should be recorded on the calibration tapes:
Video: 100 % colour bars;
Audio: 1 kHz tone at –20 dB below full level.
1.6.3 Purchase
The calibration tape may be purchased from the manufacturers given in annex B.
2 Helical recordings
2.1 Tape speed
The tape speed is 37,594 mm/s for both 1125-60 and 1250-50 systems.
The tape speed tolerance is ±0,5 %.
2.2 Record location and dimensions
Record location and dimensions for continuous recording shall be as specified in figure 1 of
IEC 61834-2. Each value is described in table 1. For recording, helical tracks shall be
contained within the tolerance specified in table 1.
Each sector location from the start of the SSA shall be as specified in figure 2 and table 2 of
IEC 61834-2. The physical tape pattern shall be specified by the centre line of each track.
The effective area upper edge, record and playback guarantee, overwrite margin (OM) and
switching margin for recording amplifiers are the same as in IEC 61834-2.

61834-3 © IEC:1999(E) – 9 –
2.2.1 Scanner example
Scanner dimensions in table 3 are one possible configuration. Other mechanical configurations
are permitted, if the same footprint of recorded information is produced on tape.
3 Programme track data arrangement
3.1 Introduction
Each television frame is recorded on 20 tracks for the 1125-60 system and 24 tracks for the
1250-50 system.
The helical tracks are recorded with video, audio and system data the same as the SD format
in IEC 61834-2. Figure 1 shows the arrangement of a track for both systems.
Each track is numbered from the beginning track of the television frame in order. A track which
has track number i (i = 0 to 19 for 1125-60 system or i = 0 to 23 for 1250-50 system) is referred
to as track i.
Placement of F0, F1 and F2 tracks is shown in figure 2 for the 1125-60 system and figure 3 for
the 1250-50 systems. In both systems, pilot frame 0 repeats.
3.2 Labelling convention
The most significant bit is written on the left and is the first recorded on the tape. The lowest
numbered byte is shown on the top left and is the first encountered in the input data stream.
Byte values are expressed in binary coded decimal notation unless otherwise noted.
An "h" subscript indicates hexadecimal value. A "b" subscript indicates binary value.
3.3 Audio sector
Same as IEC 61834-2 except for sequence number (see table 4) and track pair number (see
tables 5 and 6).
3.4 Video sector
Same as IEC 61834-2 except for sequence number (see table 4) and track pair number (see
tables 5 and 6)
3.5 Subcode sector
Same as IEC 61834-2 except for subcode postamble which begins with run-up of modulated
1 200 bits for the 1125-60 and 1250-50 systems.
4 Audio interface
Same as IEC 61834-2.
5 Video interface
Same as IEC 61834-2.
– 10 – 61834-3 © IEC:1999(E)
6 Audio signal processing
6.1 Introduction
The audio signal is recorded on four audio blocks. Each audio block is processed
independently and identically. The audio block is composed of five audio sectors in
five consecutive tracks for the 1125-60 system and six audio sectors in six consecutive tracks
for the 1250-50 system. Audio signal processing in each audio block is the same as in
IEC 61834-2.
Option:
In this standard, 20 bits audio for professional use is prepared. Details are described in annex A.
6.2 Error correction code
Same as IEC 61834-2.
6.3 Randomization pattern
Same as IEC 61834-2.
6.4 Audio encoding
Same as IEC 61834-2.
6.5 Audio channel allocation
6.5.1 Audio block
The audio block is the physical recording channel for audio signal on tape. In this standard,
four audio blocks named CH1, CH2, CH3 and CH4 are provided. The construction of these
audio blocks is shown in table 7. In each audio block, one of four encoding modes prescribed
in table 13 in IEC 61834-2 is applied. Audio signals with the same encoding mode shall be
recorded in CH1 and CH2, and in CH3 and CH4. CH1 and CH3 may be recorded with a
different encoding mode from each other, but the quantization in CH1 to CH4 shall be the same
except for HD-6ch audio described later.
6.5.2 Audio channel mode
For the assignment of encoding mode in four audio blocks, three types of audio channel modes
are prepared, that is HD-4ch audio, HD-8ch audio and HD-6ch audio.
In 48k mode, 44,1k mode and 32k mode, a signal of one audio channel is recorded in an audio
block. Since four audio channels are available, these modes are called HD-4ch audio.
In 32k-2ch mode, signals of two audio channels are recorded in an audio block. Since eight
audio channels are available, this mode is called HD-8ch audio.
In the combination of 48k mode and 32k-2ch mode, signals of two audio channels are recorded
in CH1 and CH2, and signals of four audio channels are recorded in CH3 and CH4. Since six
audio channels are available, this mode is called HD-6ch audio. HD-6ch audio is available only
for lumped audio described in 6.5.3.
6.5.3 Channel allocation rule
A channel allocation is classified into two kinds of rules by the attribute of source contents, that
is, multi-stereo audio and lumped audio.

61834-3 © IEC:1999(E) – 11 –
6.5.3.1 Multi-stereo audio
Multi-stereo audio is defined as multiple sets of stereo audio. Each stereo audio signal may be
recorded independently. Multi-stereo audio contains HD-4ch audio and HD-8ch audio.
Basic channel allocation rule for HD-4ch audio is described in table 8. Encoded data in CH1 to
CH4 correspond to encoded data X in figure 17 in IEC 61834-2. The audio signals which are
recorded simultaneously with the video signal shall be recorded in CH1 and CH2.
Basic channel allocation rule for HD-8ch audio is described in table 8. Each audio channel in
HD-8ch audio is named as CHa, CHb, CHc, CHd, CHe, CHf, CHg and CHh. CHa and CHb shall
be recorded in CH1, CHc and CHd shall be recorded in CH2, CHe and CHf shall be recorded in
CH3, and CHg and CHh shall be recorded in CH4. Encoded data in CHa, CHc, CHe and CHg
correspond to encoded data Y, and encoded data in CHb, CHd, CHf and CHh correspond to
encoded data Z in figure 18 in IEC 61834-2. For the channel described as "No information" in
CHb, CHd, CHf or CHh, all zero data or the same data as CHa, CHc, CHe or CHg may be
recorded. The audio signals which are recorded simultaneously with the video signal shall be
recorded in CH1.
6.5.3.2 Lumped audio
Lumped audio is defined so that all channels of audio blocks shall be recorded simultaneously.
Lumped audio contains HD-4ch audio, HD-6ch audio and HD-8ch audio which are called
lumped-4ch audio, lumped-6ch audio and lumped-8ch audio respectively. The channel
allocation rule of lumped audio is shown in table 9. Lumped-6ch audio and lumped-8ch audio
are prepared for pre-recorded tapes. If the woofer channel is not used, all zero data as audio
data shall be recorded into the channel. Other channel allocations are reserved.
For lumped audio, SM of AAUX SOURCE pack shall be set to "1". For playback, each SM of
AAUX SOURCE pack in all audio blocks should be checked.
Mixing levels of Lmix, Rmix, T, Q1 and Q2 in table 9 are referred to in ITU-R Recommendation 775.
6.6 Frame structure
6.6.1 Relative audio-video timing
Audio signals are recorded separately by the video frame period, and the duration of one audio
frame is defined as one video frame. An audio frame begins with the audio sample acquired
within the duration of minus 50 samples to zero sample from the beginning of the first line in
the first field of the input video signal.
6.6.2 Audio frame processing
This standard provides the same audio frame processing modes as IEC 61834-2.
6.6.2.1 Unlocked mode
Unlocked mode is applied to 48k, 44,1k, 32k and 32k-2ch modes when sampling frequency of
the audio signal is not synchronous with the video frame frequency. The number of audio
samples per frame is variable within the range between the maximum and the minimum, as
shown in table 10. The number of audio samples per frame is rounded to integer. The
recording capacity of audio data for each audio block corresponds with the maximum in 48k
mode. For the lack of samples for filling the audio block, undefined values, "1" or "0", which
mean "don't-care data", shall be recorded.

– 12 – 61834-3 © IEC:1999(E)
6.6.2.2 Locked mode
Locked mode is applied to 48k, 32k and 32k-2ch modes when sampling frequency of the audio
signal is synchronous with the video frequency. The audio sampling frequency (fs) is related to
the line frequency (fh) by the following equations.
48k mode: for 1125-60 system
fs = fh × 64 / 45
for 1250-50 system
fs = fh × 192 / 125
32k mode and 32k-2ch mode: fs = fh × 128 / 135 for 1125-60 system
for 1250-50 system
fs = fh × 128 / 125
The number of audio samples per frame keeps a regular sequence or fixed value as shown in
table 12.
6.7 Shuffling method
Audio samples and undefined values are shuffled over tracks and data-sync blocks within a
frame. Firstly audio data are shuffled then undefined values are set. Data Dn that is sampled
at n-th order (n = 0, 1, 2.) within a frame is located at the position derived from the following
equations.
Audio shuffling patterns are the same as figure 19 and figure 21 in IEC 61834-2 for 1125-60
system, and figure 20 and figure 22 in IEC 61834-2 for 1250-50 system. The following
description of track number is added in each figure.
a) 1125-60 system
"Track 10 or Track 15" is added to "Track 0 or Track 5".
"Track 11 or Track 16" is added to "Track 1 or Track 6".
"Track 12 or Track 17" is added to "Track 2 or Track 7".
"Track 13 or Track 18" is added to "Track 3 or Track 8".
"Track 14 or Track 19" is added to "Track 4 or Track 9".
b) 1250-50 system
"Track 12 or Track 18" is added to "Track 0 or Track 6".
"Track 13 or Track 19" is added to "Track 1 or Track 7".
"Track 14 or Track 20" is added to "Track 2 or Track 8".
"Track 15 or Track 21" is added to "Track 3 or Track 9".
"Track 16 or Track 22" is added to "Track 4 or Track 10".
"Track 17 or Track 23" is added to "Track 5 or Track 11".

61834-3 © IEC:1999(E) – 13 –
6.7.1 48k, 44,1k, 32k modes
a) 1125-60 system
Track number: for CH1
(INT(n / 3) + 2 × (n mod 3)) mod 5
for CH2
(INT(n / 3) + 2 × (n mod 3)) mod 5 + 5
for CH3
(INT(n / 3) + 2 × (n mod 3)) mod 5 + 10
for CH4
(INT(n / 3) + 2 × (n mod 3)) mod 5 + 15
Sync block number:
2 + 3 × (n mod 3) + INT((n mod 45) / 15)
Byte position number: for the most significant byte
10 + 2 × INT(n / 45)
for the least significant byte
11 + 2 × INT(n / 45)
where
n = 0 to 1 619 for 48k mode;
n = 0 to 1 488 for 44,1k mode;
n = 0 to 1 079 for 32k mode.
b) 1250-50 system
Track number: for CH1
(INT(n / 3) + 2 × (n mod 3)) mod 6
for CH2
(INT(n / 3) + 2 × (n mod 3)) mod 6 + 6
for CH3
(INT(n / 3) + 2 × (n mod 3)) mod 6 + 12
for CH4
(INT(n / 3) + 2 × (n mod 3)) mod 6 + 18
Sync block number:
2 + 3 × (n mod 3) + INT((n mod 54) / 18)
Byte position number: for the most significant byte
10 + 2 × INT(n / 54)
11 + 2 × INT(n / 54) for the least significant byte
where
n = 0 to 1 943 for 48k mode;
n = 0 to 1 785 for 44,1k mode;
n = 0 to 1 295 for 32k mode.
6.7.2 32k-2ch modes
a) 1125-60 system
Track number: for CH1
(INT(n / 3) + 2 × (n mod 3)) mod 5
for CH2
(INT(n / 3) + 2 × (n mod 3)) mod 5 + 5
for CH3
(INT(n / 3) + 2 × (n mod 3)) mod 5 + 10
for CH4
(INT(n / 3) + 2 × (n mod 3)) mod 5 + 15
Sync block number:
2 + 3 × (n mod 3) + INT((n mod 45) / 15)
Byte position number: for the most significant byte Y
10 + 3 × INT(n / 45)
for the most significant byte Z
11 + 3 × INT(n / 45)
for the least significant byte
12 + 3 × INT(n / 45)
where n = 0 to 1 079.
– 14 – 61834-3 © IEC:1999(E)
b) 1250-50 system
Track number: for CH1
(INT(n / 3) + 2 × (n mod 3)) mod 6
for CH2
(INT(n / 3) + 2 × (n mod 3)) mod 6 + 6
for CH3
×
(INT(n / 3) + 2 (n mod 3)) mod 6 + 12
for CH4
(INT(n / 3) + 2 × (n mod 3)) mod 6 + 18
Sync block number:
2 + 3 × (n mod 3) + INT((n mod 54) / 18)
Byte position number: for the most significant byte Y
10 + 3 × INT(n / 54)
for the most significant byte Z
11 + 3 × INT(n / 54)
for the least significant byte
12 + 3 × INT(n / 54)
where n = 0 to 1 295.
6.8 Audio auxiliary data (AAUX)
The same data as in IEC 61834-2 are defined for CH1 to CH4.
6.9 Invalid recording
For recording invalid values as audio data, REC MODE in AAUX1 shall be set to 111b. The
values of the invalid data are not taken into account.
7 Video signal processing
7.1 Introduction
Video signals are sampled by 40,5 MHz for luminance and 13,5 MHz for colour differences.
Video signal processing for bit rate reduction is almost the same as in IEC 61834-2. A macro
block of HD format consists of eight DCT blocks, while that of SD format consists of six DCT
blocks.
7.2 Error correction code
Same as IEC 61834-2.
7.3 Randomization pattern
Same as IEC 61834-2.
7.4 Video structure
7.4.1 Sampling structure
The sampling structure is defined as 12:4:4 component television signals based on ITU-R
Recommendation 709. Sampling structures of luminance (Y) and two colour difference signals
(CR, CB) are shown in table 13.
7.4.1.1 Pixel and line structures in one frame
The sampling starting point of Y signal shall be 124T for 1125-60 system or 144T for 1250-50
system from the horizontal sync timing reference
where
T = s
40,5 × 10
The sampling starting point in the active period of CR and CB signals shall be the same as the
sampling starting point in the active period of Y signal.

61834-3 © IEC:1999(E) – 15 –
Each pixel has a value from –127 to 126 which is obtained by a subtraction of 128 from the
input video signal level.
a) 1125-60 system
For Y signals, 1 008 pixels per line shall be transmitted. Each colour difference signal shall
be decimated line sequentially in every two lines and 336 pixels per line shall be
transmitted as shown in figure 4.
The active lines shall be from line 44 to line 555 and from line 606 to line 1 117 as shown in
table 13. From each field, 512 lines for Y signals and 256 lines for CR and CB signals shall
be transmitted.
b) 1250-50 system
For Y signals, 1 080 pixels per line shall be transmitted. Each colour difference signal shall
be decimated line sequentially in every two lines and 360 pixels per line shall be
transmitted as shown in figure 5.
The active lines shall be from line 45 to line 620 and from line 670 to line 1 245 as shown in
table 13. From each field, 576 lines for Y signals and 288 lines for CR and CB signals shall
be transmitted.
7.4.1.2 Filter characteristic
Filter characteristics are recommended as follows for 1125-60 and 1250-50 systems:
– less than or equal to –12 dB at 20,25 MHz for luminance signal;
– less than or equal to –6 dB at 6,75 MHz for chrominance signal.
7.4.2 DCT block
The Y, CR and CB pixels in one frame shall be divided into DCT blocks as shown in figure 6.
All DCT blocks are structured with a rectangular area of eight vertical lines and eight horizontal
pixels in a frame. The value of x shows the horizontal coordinate from the left and the value
of y shows the vertical coordinate from the top. For 1125-60 system, odd lines of y = 1, 3, 5, 7
are the horizontal lines of field one, and even lines of y = 0, 2, 4, 6 are those of field two. For
1250-50 system, even lines of y = 0, 2, 4, 6 are the horizontal lines of field one, and odd lines
of y = 1, 3, 5, 7 are those of field two.
7.4.2.1 DCT block arrangement in one frame for 1125-60 system
The arrangement of horizontal DCT blocks in one frame is shown in figure 7. The same
horizontal arrangement is repeated to 128 DCT blocks for Y and 64 DCT blocks for CR and CB
in a vertical direction. Pixels in one frame are divided into 21 504 DCT blocks.
– Y: Vertical 128 DCT blocks × horizontal 126 DCT blocks = 16 128 DCT blocks
– CR: Vertical  64 DCT blocks × horizontal  42 DCT blocks =  2 688 DCT blocks
– CB: Vertical  64 DCT blocks × horizontal  42 DCT blocks =  2 688 DCT blocks
7.4.2.2 DCT block arrangement in one frame for 1250-50 system
The arrangement of horizontal DCT blocks in one frame is shown in figure 7. The same
horizontal arrangement is repeated on 144 DCT blocks for Y and 72 DCT blocks for CR and
CB in vertical direction. Pixels in one frame are divided into 25 920 DCT blocks.
– Y: Vertical 144 DCT blocks × horizontal 135 DCT blocks = 19 440 DCT blocks
– CR: Vertical  72 DCT blocks × horizontal  45 DCT blocks =  3 240 DCT blocks
– CB: Vertical  72 DCT blocks × horizontal  45 DCT blocks =  3 240 DCT blocks

– 16 – 61834-3 © IEC:1999(E)
7.4.3 Macro block
7.4.3.1 Macro block and DCT blocks
Each macro block consists of eight DCT blocks. Figure 8 shows the relationship between
macro blocks and DCT blocks.
7.4.3.2 Macro block arrangement in one frame for 1125-60 system
Macro block arrangement in one frame has two steps.
a) Step 1: Arranging macro blocks
The pixels in one frame are divided into 2 688 macro blocks as shown in figure 9.
Vertical 64 macro blocks × horizontal 42 macro blocks = 2 688 macro blocks
b) Step 2: Rearranging macro blocks
Nine macro blocks in A0 to A7 and A10 to A17 are arranged into three macro blocks × three
macro blocks in B0 to B7 and B10 to B17 respectively as shown in figure 9.
Six macro blocks in A8, A9, A18 and A19 plus three dummy macro blocks are arranged into
three macro blocks × three macro blocks in B8, B9, B18 and B19 respectively as shown in
figure 9. Each pixel in dummy macro blocks should have the same value such as the centre
level of the video signal.
Vertical 60 macro blocks × horizontal 45 macro blocks = 2 700 macro blocks.
As a result, the arrangement of macro blocks in one frame becomes the form as shown in
figure 10. The small rectangle shows a macro block.
7.4.3.3 Macro block arrangement in one frame for 1250-50 system
Pixels in one frame are divided into 3 240 macro blocks.
Vertical 72 macro blocks × horizontal 45 macro blocks = 3 240 macro blocks
The arrangement of macro blocks in one frame is shown in figure 11. The small rectangle
shows a macro block.
7.4.4 Super block
Each super block consists of 27 macro blocks.
7.4.4.1 Super block arrangement in one frame for 1125-60 system
The arrangement of super blocks in one frame is shown in figure 10. Each super block is
structured with 27 adjacent macro blocks enclosed by a thick line. The pixels in a frame are
divided into 100 super blocks.
Vertical 20 super blocks × horizontal 5 super blocks = 100 super blocks
7.4.4.2 Super block arrangement in one frame for 1250-50 system
The arrangement of super blocks in one frame is shown in figure 11. Each super block is
structured with 27 adjacent macro blocks enclosed by a thick line. The pixels in a frame are
divided into 120 super blocks.
Vertical 24 super blocks × horizontal 5 super blocks = 120 super blocks

61834-3 © IEC:1999(E) – 17 –
7.4.5 Definition of super block number, macro block number and value
...

IEC 61834-3
Edition 1.0 1999-11
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Recording – Helical-scan digital video cassette recording system using 6,35 mm
magnetic tape for consumer use (525-60, 625-50, 1125-60 and 1250-50 systems) –
Part 3: HD format for 1125-60 and 1250-50 systems

Enregistrement – Systèmes de magnétoscopes numériques à cassette à
balayage hélicoïdal sur bande magnétique de 6,35 mm pour usage grand public
(systèmes 525-60, 625-50, 1125-60 et 1250-50) –
Partie 3: Format HD pour systèmes 1125-60 et 1250-50

Copyright © 1999 IEC, Geneva, Switzerland

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IEC 61834-3
Edition 1.0 1999-11
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Recording – Helical-scan digital video cassette recording system using 6,35 mm
magnetic tape for consumer use (525-60, 625-50, 1125-60 and 1250-50 systems) –
Part 3: HD format for 1125-60 and 1250-50 systems

Enregistrement – Systèmes de magnétoscopes numériques à cassette à
balayage hélicoïdal sur bande magnétique de 6,35 mm pour usage grand public
(systèmes 525-60, 625-50, 1125-60 et 1250-50) –
Partie 3: Format HD pour systèmes 1125-60 et 1250-50

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
XB
CODE PRIX
ICS 33.160.40 ISBN 2-8318-5130-0
– 2 – 61834-3 © CEI:1999
SOMMAIRE
Pages
AVANT-PROPOS . 10
Articles
1 Généralités .14
1.1 Domaine d’application . 14
1.2 Références normatives . 14
1.3 Définitions, symboles et abréviations. 16
1.4 Environnement et conditions d’essai. 16
1.5 Bande de référence. 16
1.6 Bande étalon. 16
1.6.1 Emplacements et dimensions des enregistrements . 16
1.6.2 Signaux d’étalonnage . 16
1.6.3 Acquisition . 16
2 Enregistrements hélicoïdaux . 16
2.1 Vitesse de la bande. 16
2.2 Emplacement et dimensions des enregistrements . 16
2.2.1 Exemple d’analyseur . 18
3 Répartition des données de la piste de programme. 18
3.1 Introduction. 18
3.2 Convention relative à l’étiquetage. 18
3.3 Secteur audio. 18
3.4 Secteur vidéo. 18
3.5 Secteur de sous-code . 18
4 Interface audio . 20
5 Interface vidéo . 20
6 Traitement des signaux audio. 20
6.1 Introduction. 20
6.2 Code de correction d’erreur. 20
6.3 Configuration du tirage aléatoire. 20
6.4 Codage audio. 20
6.5 Attribution des voies audio . 20
6.5.1 Bloc audio . 20
6.5.2 Mode des voies audio. 20
6.5.3 Règle d’attribution des voies. 22
6.6 Structure de trame . 24
6.6.1 Synchronisation relative des signaux audio vidéo. 24
6.6.2 Traitement d’une trame audio . 24
6.7 Méthode de brassage. 24
6.7.1 Modes 48k, 44,1k, 32k . 26
6.7.2 Mode 32k-2ch . 28
6.8 Données auxiliaires audio (AAUX) . 28
6.9 Enregistrement non valable . 28
7 Traitement des signaux vidéo . 28
7.1 Introduction. 28
7.2 Code de correction d’erreur. 28
7.3 Configuration du tirage aléatoire. 30

61834-3 © IEC:1999 – 3 –
CONTENTS
Page
FOREWORD .11
Clause
1 General. 15
1.1 Scope . 15
1.2 Normative references. 15
1.3 Definitions, symbols and abbreviations . 17
1.4 Environment and test conditions. 17
1.5 Reference tape . 17
1.6 Calibration tape. 17
1.6.1 Record locations and dimensions . 17
1.6.2 Calibration signals. 17
1.6.3 Purchase. 17
2 Helical recordings . 17
2.1 Tape speed. 17
2.2 Record location and dimensions . 17
2.2.1 Scanner example . 19
3 Programme track data arrangement . 19
3.1 Introduction. 19
3.2 Labelling convention. 19
3.3 Audio sector. 19
3.4 Video sector. 19
3.5 Subcode sector . 19
4 Audio interface. 21
5 Video interface. 21
6 Audio signal processing. 21
6.1 Introduction. 21
6.2 Error correction code. 21
6.3 Randomization pattern . 21
6.4 Audio encoding . 21
6.5 Audio channel allocation. 21
6.5.1 Audio block . 21
6.5.2 Audio channel mode. 21
6.5.3 Channel allocation rule . 23
6.6 Frame structure . 25
6.6.1 Relative audio-video timing. 25
6.6.2 Audio frame processing. 25
6.7 Shuffling method . 25
6.7.1 48k, 44,1k, 32k modes . 27
6.7.2 32k-2ch modes. 29
6.8 Audio auxiliary data (AAUX) . 29
6.9 Invalid recording . 29
7 Video signal processing. 29
7.1 Introduction. 29
7.2 Error correction code. 29
7.3 Randomization pattern . 31

– 4 – 61834-3 © CEI:1999
7.4 Structure du signal vidéo. 30
7.4.1 Structure des échantillons . 30
7.4.2 Bloc DCT . 32
7.4.3 Bloc macro. 32
7.4.4 Super bloc. 34
7.4.5 Définition des numéros des super blocs, blocs macro et de la valeur
d’un pixel . 34
7.4.6 Définition des segments vidéo et des blocs macro comprimés . 36
7.5 Traitement DCT . 36
7.6 Quantification. 36
7.6.1 Introduction . 36
7.6.2 Affectation des bits pour la quantification. 38
7.6.3 Numéro de classe . 38
7.6.4 Mise à l’échelle initiale. 38
7.6.5 Numéro de zone. 38
7.6.6 Pas de quantification . 38
7.7 Codage de longueur variable (VLC) . 40
7.8 Disposition d’un bloc macro comprimé. 40
7.8.1 STA (état du bloc macro comprimé). 40
7.8.2 QNO (numéro de quantification) . 40
7.8.3 DC . 40
7.8.4 AC . 40
7.9 Disposition d’un segment vidéo . 40
7.9.1 Algorithme de répartition d’un segment vidéo. 40
7.9.2 Traitement du code correcteur d’erreur vidéo. 44
7.10 Bloc de données synchronisées et bloc macro comprimé. 44
7.11 Données vidéo auxiliaires (VAUX) . 44
7.12 Enregistrement non valable . 46
8 Traitement des signaux de sous-code. 46
8.1 Périodes d’enregistrement de TAG ID . 46
8.2 Méthode d’écriture dans la zone optionnelle . 46
8.3 Périodes d’écriture de TAG ID. 46
9 Données système. 46
9.1 AAUX. 46
9.2 VAUX. 50
9.3 Sous-code . 50
9.4 MIC. 52
10 Structure des données pour une interface numérique . 52
10.1 Introduction. 52
10.2 Structure des données . 52
10.3 Séquence DIF . 52
10.4 Bloc DIF. 52
10.4.1 Partie ID. 52
10.4.2 Partie données . 54
10.5 Durée d’une trame . 56
10.6 Vitesse de lecture . 58

61834-3 © IEC:1999 – 5 –
7.4 Video structure. 31
7.4.1 Sampling structure . 31
7.4.2 DCT block . 33
7.4.3 Macro block . 33
7.4.4 Super block. 35
7.4.5 Definition of super block number, macro block number and value
of the pixel . 35
7.4.6 Definition of video segment and compressed macro block . 37
7.5 DCT processing . 37
7.6 Quantization. 37
7.6.1 Introduction . 37
7.6.2 Bit assignment for quantization. 39
7.6.3 Class number. 39
7.6.4 Initial scaling . 39
7.6.5 Area number . 39
7.6.6 Quantization step . 39
7.7 Variable length coding (VLC). 41
7.8 Arrangement of a compressed macro block . 41
7.8.1 STA (status of the compressed macro block). 41
7.8.2 QNO (quantization number) . 41
7.8.3 DC . 41
7.8.4 AC . 41
7.9 Arrangement of a video segment . 41
7.9.1 Arrangement algorithm of a video segment . 41
7.9.2 Video error code processing . 45
7.10 Data-sync block and compressed macro block . 45
7.11 Video auxiliary data (VAUX) . 45
7.12 Invalid recording . 47
8 Subcode signal processing. 47
8.1 The recording periods of TAG ID . 47
8.2 The writing method of the optional area . 47
8.3 The rewriting periods of TAG ID . 47
9 System data . 47
9.1 AAUX. 47
9.2 VAUX. 51
9.3 Subcode . 51
9.4 MIC. 53
10 Data structure for digital interface. 53
10.1 Introduction. 53
10.2 Data structure . 53
10.3 DIF sequence. 53
10.4 DIF block . 53
10.4.1 ID part. 53
10.4.2 Data part. 55
10.5 Frame period . 57
10.6 Playback speed. 59

– 6 – 61834-3 © CEI:1999
Annex A (normative) Version audio 20 bits à usage professionnel . 114
A.1 Attribution des voies. 11 4
A.2 Mode de codage. 114
A.3 Code d’erreur audio. 114
A.4 Méthode de brassage. 114
Annex B (informative) Constructeurs. 124
B.1 Bande de référence. 124
B.2 Bande étalon. 124
B.3 Approvisionnement des bandes . 124
Figure 1 – Disposition des secteurs sur une piste hélicoïdale
(systèmes 1125-60 et 1250-50). 60
Figure 2 – Système 1125-60 . 60
Figure 3 – Système 1250-50 . 62
Figure 4 – Echantillons de transmission pour système 1125-60 . 74
Figure 5 – Echantillons de transmission pour système 1250-50 . 76
Figure 6 – Bloc DCT et coordonnées des pixels . 76
Figure 7 – Disposition des blocs DCT . 78
Figure 8 – Bloc macro et ordre des blocs DCT . 78
Figure 9 – Disposition des blocs macro pour système 1125-60. 80
Figure 10 – Super blocs et blocs macro dans une trame d’écran TV pour système 1125-60. 82
Figure 11 – Super blocs et blocs macro dans une trame d’écran TV pour système 1250-50. 84
Figure 12 – Ordre des blocs macro dans un super bloc . 86
Figure 13 – Numéro de zone. 86
Figure 14 – Disposition d’un bloc macro comprimé. 88
Figure 15 – Disposition d’un segment vidéo après réduction du débit binaire . 90
Figure 16 – Rapport entre le numéro du bloc macro comprimé
et le bloc de synchronisation des données . 92
Figure 17 – Zone principale et zone optionnelle (système 1125-60) . 94
Figure 18 – Zone principale et zone optionnelle (système 1250-50) . 96
Figure 19 – Structure des données pour la transmission . 100
Figure 20 – Ordre de transmission des blocs DIF dans une séquence DIF. 102
Figure 21 – Données ID dans un bloc DIF . 104
Figure 22 – Données dans la section en-tête. 104
Figure A.1 – Echantillonnage de conversion de données pour la voie 20 bits . 122
Tableau 1 – Emplacement et dimensions des enregistrements
(systèmes 1125-60 et 1250-50). 58
Tableau 2 – Emplacement des secteurs à partir de la zone SSA
(systèmes 1125-60 et 1250-50). 58
Tableau 3 – Exemple d'analyseur (systèmes 1125-60 et 1250-50). 58
Tableau 4 – Numéro de séquence (systèmes 1125-60 et 1250-50). 62
Tableau 5 – Numéro des paires de pistes (systèmes 1125-60) . 62
Tableau 6 – Numéro des paires de pistes (systèmes 1250-50) . 64
Tableau 7 – Construction d’un bloc audio. 64
Tableau 8 – Règle fondamentale d’attribution des voies dans un signal audio multi-stéréo . 66
Tableau 9 – Règle d’attribution des voies dans un signal audio groupé. 68

61834-3 © IEC:1999 – 7 –
Annex A (normative) 20 bits audio for professional use . 115
A.1 Channel allocation. 11 5
A.2 Encoding mode . 115
A.3 Audio error code . 115
A.4 Shuffling method . 115
Annex B (informative) Manufacturers . 125
B.1 Reference tape . 125
B.2 Calibration tape. 125
B.3 Purchase . 125
Figure 1 Sector arrangement on helical track (1125-60 and 1250-50 systems). 61
Figure 2 – 1125-60 system . 61
Figure 3 – 1250-50 system . 63
Figure 4 – Transmitting samples for 1125-60 system. 75
Figure 5 – Transmitting samples for 1250-50 system. 77
Figure 6 – DCT block and the pixel coordinates . 77
Figure 7 – DCT block arrangement . 79
Figure 8 – Macro block and DCT block order . 79
Figure 9 – Arrangement of macro blocks for 1125-60 system . 81
Figure 10 – Super blocks and macro blocks in a frame on TV screen for 1125-60 system. 83
Figure 11 – Super blocks and macro blocks in a frame on TV screen for 1250-50 system. 85
Figure 12 – Macro block order in a super block . 87
Figure 13 – Area number . 87
Figure 14 – The arrangement of a compressed macro block . 89
Figure 15 – The arrangement of a video segment after bit-rate reduction . 91
Figure 16 – The relation between the compressed macro block number and
the data-sync block. 93
Figure 17 – Main area and optional area (1125-60 system) . 95
Figure 18 – Main area and optional area (1250-50 system) . 97
Figure 19 – Data structure for transmission. 101
Figure 20 – Transmission order of DIF blocks in a DIF sequence . 103
Figure 21 – ID data in a DIF block. 105
Figure 22 – Data in the header section. 105
Figure A.1 –Sample to data bytes conversion for 20 bits . 123
Table 1 – Record location and dimensions (1125-60 system, 1250-50 system) . 59
Table 2 – Sector location from SSA (1125-60 system, 1250-50 system) . 59
Table 3 – Scanner example (1125-60 system, 1250-50 system) . 59
Table 4 – Sequence number (1125-60 and 1250-50 systems) . 63
Table 5 – Track pair number (1125-60 system) . 63
Table 6 – Track pair number (1250-50 system) . 65
Table 7 – Construction of an audio block . 65
Table 8 – Basic channel allocation rule in multi-stereo audio . 67
Table 9 – Channel allocation rule for lumped audio . 69

– 8 – 61834-3 © CEI:1999
Tableau 10 – Nombre d’échantillons audio par trame (mode non verrouillé). 70
Tableau 11 – Plage de tolérance de la valeur de la différence cumulée entre les nombres
d’échantillons audio par trame dans les voies synchrones . 70
Tableau 12 – Nombre d’échantillons audio par trame (mode verrouillé) . 70
Tableau 13 – Construction d’un échantillonnage de signal vidéo (12:4:4). 72
Tableau 14 – Exemple de classification de référence . 86
Tableau 15 – Pas de quantification . 88
Tableau 16 – Données AAUX de la zone principale . 98
Tableau 17 – Données VAUX de la zone principale . 98
Tableau 18 – Données TIA dans la section en-tête. 106
Tableau 19 – Blocs DIF et blocs de synchronisation du sous-code . 106
Tableau 20 – Blocs DIF et blocs de synchronisation des données VAUX . 108
Tableau 21 – Blocs DIF et blocs de synchronisation des données audio . 110
Tableau 22 – Blocs DIF et blocs macro comprimés . 112
Tableau A.1 – Règle fondamentale d’attribution des voies. 122

61834-3 © IEC:1999 – 9 –
Table 10 – The number of audio samples per frame (unlocked mode) . 71
Table 11 – The allowance range of the accumulated difference value between the numbers
of audio samples per frame in synchronous channels. 71
Table 12 –The number of audio samples per frame (locked mode). 71
Table 13 – The construction of video signal sampling (12:4:4). 73
Table 14 – An example of the classification for reference. 87
Table 15 – Quantization step . 89
Table 16 – AAUX data of the main area . 99
Table 17 – VAUX data of the main area . 99
Table 18 – TIA data in the header section . 107
Table 19 – DIF blocks and subcode sync blocks . 107
Table 20 – DIF blocks and VAUX data-sync blocks . 109
Table 21 – DIF blocks and audio data-sync blocks . 111
Table 22 – DIF blocks and compressed macro blocks . 113
Table A.1 – Basic channel allocation rule . 123

– 10 – 61834-3 © CEI:1999
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