EN 61119-1:1994
(Main)Digital audio tape cassette system (DAT) - Part 1: Dimensions and characteristics
Digital audio tape cassette system (DAT) - Part 1: Dimensions and characteristics
Applies to the digital audio tape (DAT) cassette system that records and/or plays back digital information such as PCM encoded audio and/or other data. Defines the parameters that affect the compatibility between cassettes and the associated tape recorders. It is also intended as a reference for manufacturers producing cassettes and/or tape recorders which are to conform with the system described in this part.
Digitales Tonband-Kassetten-System - Teil 1: Maße und Kennwerte
Système audionumérique à cassette (DAT) - Partie 1: Dimensions et caractéristiques
S'applique à un système audionumérique à bande magnétique (DAT) en cassette destiné à l'enregistrement et à la reproduction d'informations numériques telles que des signaux codés MIC et/ou d'autres données. Définit les paramètres qui assurent la compatibilité des cassettes avec les machines à bande associées. Est également destinée à servir de référence pour les fabricants de cassettes et les constructeurs de machines prévues pour être utilisées avec le système qui fait l'objet de la présente partie.
Digital audio tape cassette system (DAT) -- Part 1: Dimensions and characteristics (IEC 61119-1:1992)
General Information
Standards Content (Sample)
SLOVENSKI STANDARD
01-april-1999
Digital audio tape cassette system (DAT) -- Part 1: Dimensions and characteristics
(IEC 61119-1:1992)
Digital audio tape cassette system (DAT) -- Part 1: Dimensions and characteristics
Digitales Tonband-Kassetten-System -- Teil 1: Maße und Kennwerte
Système audionumérique à cassette (DAT) -- Partie 1: Dimensions et caractéristiques
Ta slovenski standard je istoveten z: EN 61119-1:1994
ICS:
33.160.30 Avdio sistemi Audio systems
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
CEI
NORME
INTERNATIONALE IEC
1119-1
INTERNATIONAL
Première édition
STANDARD First edition
1992-11
à cassette (DAT)
Système audionumérique
Partie 7 :
Dimensions et caractéristiques
Digital audio tape cassette system (DAT)
Part 1:
Dimensions and characteristics
réservés — Copyright — all rights reserved
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- 3 --
1119-1©IEC
CONTENTS
Page
FOREWORD
INTRODUCTION
Clause
15 1 Scope and object
2 Normative references
3 Description of the system
4 Test conditions
17 5 Mechanical parameters
17 5.1 Cassette
Dimensions and tolerances 5.1.1
5.1.2 Outside view
5.1.3 Label area 19
5.1.4 Window 19
19 5.1.5 Accidental erasure prevention (AEP)
5.1.6 Recognition holes
5.1.7 Cassette holding area
5.1.8 Groove for loading grip
5.1.9 Tape begin/end detection
5.1.10 Lid
5.1.11 Slider locks
5.1.12 Hub
25 5.2 Tape
5.2.1 Magnetic tape
5.2.2 Leader and trailer tapes
5.2.3 Tape winding
5.2.4 Single hub friction torque
47 6 Track configuration and patterns
47 6.1 Track configuration
6.1.1 Tape speed and number of tracks per second
6.1.2 Track angle
6.1.3 Track pitch
6.1.4 Track length
47 6.1.5 Track centre
47 6.1.6 Head azimuth
6.1.7 Effective recording width 47
6.1.8 Definition of frame 47
49 6.1.9 Optional tracks
1119-1 ©I EC - 5 -
Page
Clause
Signal allocation 6.2
6.2.1 Recording format of track
6.2.2 Positioning accuracy
Recording signals 6.3
53 Inter-block gap (IBG) 6.3.1
53 Preamble, postamble and margin
6.3.2
Automatic track finding (ATF), main data area and sub data area 6.3.3
53 7 Recording parameters
Recording level 7.1
53 Specification 7.1.1
53 Measurement method 7.1.2
55 7.2 Erasing method
Tracking scheme 8
Automatic track finding (ATF) 8.1
8.1.1 Definition
57 8.1.2 ATF signal allocation
8.1.3 Recording signal
Main data area format 9
Main data block format 9.1
9.1.1 Synchronization pattern
67 9.1.2 Main ID (W1, W2)
9.1.3 Main ID parity 69
9.1.4 Main data
9.2 Main data configuration
71 9.2.1 Main data allocation
Recording direction 9.2.2
9.3 Error correction and detection code (C1, C2)
9.3.1 Definition 73
75 Error correction code interleaving format
9.3.2
Parity symbol 77
9.3.3
9.4 Modulatin 79
Parameters 79
9.4.1
Modulation method 79
9.4.2
10 Sub data area format
Sub data block format 93
10.1
10.1.1 Synchronization pattern 93
10.1.2 Sub ID (SW1, SW2) 93
Sub ID parity 95
10.1.3
Sub data 95
10.1.4
1119-1 0 1E - 7 -
Page
Clause
10.2 Sub data configuration
97 10.2.1 Sub data allocation
99 10.2.2 Recording direction
99 10.3 Error correction and detection code (SP)
10.3.1 Definition 99
10.3.2 Error correction code interleaving format
10.3.3 Parity symbol
10.4 Modulation
11 Audio encoding
11.1 Mode application
11.1.1 Audio encoding mode
105 11.1.2 System application
11.2 Source encoding
11.2.1 Emphasis
11.2.2 Number of audio channels
11.2.3 Sampling frequency
11.2.4 Sampling timing
109 11.2.5 Quantization
111 11.3 Word to symbol conversion
11.3.1 Audio data word
11.3.2 48k mode, 44k mode, 44k-WT mode and 32k mode
11.3.3 32k-LP mode
11.3.4 32k-4CH mode
11.4 Interleave format
11.4.1 48k mode, 44k mode, 44k-WT mode and 32k mode
11.4.2 32k-LP mode
11.4.3 32k-4CH mode
12 Sub code encoding for audio use
12.1 Sub code in main ID
12.1.1 101 to 107
12.2 Sub code in sub ID
137 12.2.1 Configuration of sub ID
12.3 Sub code in sub data
139 12.3.1 Pack ID and pack location
12.3.2 Configuration of pack
12.3.3 Assignment of pack item
12.4 Sub code in main data
12.4.1 Recognition word for compact disk (CD) sub code
12.4.2 Sub code for CD format
1119-1 ©I EC – 9 –
Page
Clause
12.5 Application rules of sub code for pre-recorded tape
12.5.1 Classification of sub code recording
12.5.2 Areas along tape longitude
167 12.5.3 Location of pack
12.5.4 Classification of catalog number and ISRC recording
12.5.5 TOC recording
173 12.6 Application rules of sub code for own-recorded tape
12.6.1 Classification of sub code recording
12.6.2 Recording function of sub code
12.6.3 Areas along tape longitude
183 12.6.4 Location of time code pack
183 12.6.5 Details for recording sub code
195 12.6.6 Rules of assemble-recording
12.7 Application rules in playback situation
195 12.7.1 Detection of identification code
12.7.2 Mechanical condition
12.7.3 Shortening play
12.7.4 Display
12.7.5 Rules of searching
12.7.6 Beginning point of playback after searching
Annexes
207 A Transmissivity of the prism
B Measurement method of the force required to open the slider
C Abbreviations
D Explanations
- 11 -
1119-1 © IEC
INTERNATIONAL ELECTROTECHNICAL COMMISSION
DIGITAL AUDIO TAPE CASSETTE SYSTEM (DAT)
Part 1: Dimensions and characteristics
FOREWORD
The formal decisions or agreements of the IEC on technical matters, prepared by Technical Committees on
1)
which all the National Committees having a special interest therein are represented, express, as nearly as
possible, an international consensus of opinion on the subjects dealt with.
They have the form of recommendations for international use and they are accepted by the National
2)
Committees in that sense.
3) In order to promote international unification, the IEC expresses the wish that all National Committees
should adopt the text of the IEC recommendation for their national rules in so far as national conditions will
permit. Any divergence between the IEC recommendation and the corresponding national rules should, as
far as possible, be clearly indicated in the latter.
This International Standard IEC 1119-1 has been prepared by Sub-Committee 60A: Sound
recording, of IEC Technical Committee No. 60: Recording.
The text of this standard is based on the following documents:
DIS Report on Voting
60A(CO)130 60A(CO)135
Full information on the voting for the approval of this standard can be found in the Voting
Report indicated in the above table.
Annexes A and 8 form an integral part of this standard.
Annexes C and D are for information only.
1119-1©IEC –13
INTRODUCTION
The IEC draws attention to the fact that it is probable that the specifications contained in
this standard are the subject of one or more patents.
The IEC has no precise information on the holders of such patents and cannot supply fur-
ther details, but it is expected that the holders of such patents will be prepared to grant
licences under reasonable and non-discriminatory terms.
-15-
1119-1 © IEC
DIGITAL AUDIO TAPE CASSETTE SYSTEM (DAT)
Part 1: Dimensions and characteristics
1 Scope and object
This part of IEC 1119 is applicable to the digital audio tape (DAT) cassette system that
records and/or plays back digital information such as PCM encoded audio and/or other
data.
This part defines those parameters that affect the compatibility between cassettes and the
associated tape recorders. It is also intended as a reference for manufacturers producing
cassettes and/or tape recorders which are intended to conform with the system described
in this part.
2 Normative references
The following normative documents contain provisions which, through reference in this
text, constitute provisions of this part of IEC 1119. At the time of publication, the editions
indicated were valid. All normative documents are subject to revision, and parties to
agreements based on this part of IEC 1119 are encouraged to investigate the possibility of
applying the most recent editions of the normative documents indicated below. Members
of IEC and ISO maintain registers of currently valid International Standards.
Sound system equipment - Part 11: Application of connectors for the
IEC 268-11: 1987,
interconnection of sound system components
Sound system equipment - Part 12: Application of connectors for
IEC 268-12: 1987,
broadcast and similar use
Sound system equipment - Part 15: Preferred matching values for the
IEC 268-15: 1987,
interconnection of sound system components
IEC 958: 1989, Digital audio interface
Digital audio tape cassette system (DAT) - Part 2: DAT calibration tape
IEC 1119-2: 1991,
Digital audio tape cassette system (DAT) - Part 3: DAT tape properties
IEC 1119-3: 1992,
Digital audio tape cassette system (DAT) - Part 4: Method of measure-
IEC 1119-4: 199x,
ment for DAT recorder (under consideration)
- 17 -
1119-1 ©IEC
IEC 1119-5: 199x, Digital audio tape cassette system (DAT) - Part 5: DAT for professional
use (under consideration)
Documentation - International standard recording code (ISRC)
ISO 3901: 1986,
3 Description of the system
The information carrier is a magnetic tape of 3,81 mm width wound on flangeless hubs
which are located in a cassette containing a slider and a lid to protect the tape from
accidental damages. The tape is of the metal powder type or its equivalent. The digital
information is recorded using the helical scanning principle and can be erased by over-
writing. The digital information is read by magnetic heads using an automatic track finding
(ATF) scheme to find and follow tracks. Two track widths and three tape speeds are
defined.
It is possible to record sub code information in a main data area, either with or without
audio signals.
4 Test conditions
Tests and measurements made on the system to verify conformity with the provisions of
this part of IEC 1119 shall be carried out under the following conditions:
- Temperature: 20 °C ± 2 °C
40 % to 60 %
- Relative humidity:
86 kPa to 106 kPa
- Barometric pressure:
- Conditioning before testing: 24 h
5 Mechanical parameters
5.1 Cassette
5.1.1 Dimensions and tolerances
The cassette dimensions and tolerances are specified in figures 2 to 11 on pages 29
to 43.
In these figures, use is made of reference datum planes which are presented in figure 7,
page 39.
C. The X-datum plane is
The Z-datum plane is defined by the datum areas A, B and
defined through the centres of the positioning holes in the datum areas A and B, perpen-
dicular to plane Z. The Y-datum is defined through the centre of the positioning hole in
area A, perpendicular to planes Z and X.
19 —
1119-1 © 1 EC —
Tolerances which are not specified in these figures shall be as in the following table:
Tolerance
(mm)
Length: L
±0,1
6 ?L
30 >_L >6 ±0,2
±0,3
L >30
±1
Angle (°)
5.1.2 Outside view
The outside view is shown in figure 1 on page 27.
5.1.3 Label area
The hatched area given in figure 12 on page 45 is available for the labels of pre-recorded
cassettes.
5.1.4 Window
The window shall be positioned within the label area.
Accidental erasure prevention (AEP)
5.1.5
5.1.5.1 Accidental erasure prevention hole
The cassette shall be provided with an accidental erasure prevention hole as shown in
figure 1 and in accordance with the table in 5.1.5.2.
If an accidental erasure prevention tag is provided, the tag shall be so constructed that it
can withstand an applied force of 0,5 N.
Operation scheme and indication of accidental erasure prevention
5.1.5.2
Accidental erasure prevention may be indicated by a moving part, the colour of which shall
not be red.
The operation scheme of the accidental erasure prevention is specified in the following
table:
Impossible to record
Possible to record
Indication- Indication-
AEP hole
AEP hole
window
window
Open "1"
Closed "0" Closed "0" Open "1"
The position of the indication widow is shown in figure 1, page 27.
– 21 –
1119-1 ©I EC
5.1.6 Recognition holes
The cassette shall be provided with recognition holes (1) to (4) as shown in figure 1.
distinguish magnetic tape types and magnetic tape
(3)
The recognition holes (1), (2) and
thickness as follows:
– "0" . hole closed;
– "1" . hole open.
Hole Hole
Hole
Remarks
(2) (3)
(1)
Metal powder tape or equivalent / 13 gm thickness
0 0 0
0 Metal powder tape or equivalent / thin tape
0 1
0 0 1 Wide track / 13 gm thickness
Wide track / thin tape
0 1 1
1 X X Reserved
Recognition hole (4) distinguishes pre-recorded tape:
– "0" hole closed: non pre-recorded tape;
– "1" hole o
...
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