IEC 61119-1 : 1.0

DIGITAL AUDIO TAPE CASSETTE SYSTEMS (DAT) - DIMENSIONS AND CHARACTERISTICS

International Electrotechnical Committee

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Foreword
Introduction
Clause
1 Scope and object
2 Normative references
3 Description of the system
4 Test conditions
5 Mechanical parameters
   5.1 Cassette
        5.1.1 Dimensions and tolerances
        5.1.2 Outside view
        5.1.3 Label area
        5.1.4 Window
        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
   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
6 Track configuration and patterns
   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
        6.1.5 Track centre
        6.1.6 Head azimuth
        6.1.7 Effective recording width
        6.1.8 Definition of frame
        6.1.9 Optional tracks
   6.2 Signal allocation
        6.2.1 Recording format of track
        6.2.2 Positioning accuracy
   6.3 Recording signals
        6.3.1 Inter-block gap (IBG)
        6.3.2 Preamble, post-amble and margin
        6.3.3 Automatic track finding (ATF), main
               data area and sub data area
7 Recording parameters
   7.1 Recording level
        7.1.1 Specification
        7.1.2 Measurement method
   7.2 Erasing method
8 Tracking scheme
   8.1 Automatic track finding (ATF)
        8.1.1 Definition
        8.1.2 ATF signal allocation
        8.1.3 Recording signal
9 Main data area format
   9.1 Main data block format
        9.1.1 Synchronization pattern
        9.1.2 Main ID (W1, W2)
        9.1.3 Main ID parity
        9.1.4 Main data
   9.2 Main data configuration
        9.2.1 Main data allocation
        9.2.2 Recording direction
   9.3 Error correction and detection code (C1, C2)
        9.3.1 Definition
        9.3.2 Error correction code interleaving format
        9.3.3 Parity symbol
   9.4 Modulation
        9.4.1 Parameters
        9.4.2 Modulation method
10 Sub data area format
   10.1 Sub data block format
        10.1.1 Synchronization pattern
        10.1.2 Sub ID (SW1, SW2)
        10.1.3 Sub ID parity
        10.1.4 Sub data
   10.2 Sub data configuration
        10.2.1 Sub data allocation
        10.2.2 Recording direction
   10.3 Error correction and detection code (SP)
        10.3.1 Definition
        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
        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
        11.2.5 Quantization
   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 ID1 to ID7
   12.2 Sub code in sub ID
        12.2.1 Configuration of sub ID
   12.3 Sub code in sub data
        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
   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
        12.5.3 Location of pack
        12.5.4 Classification of catalogue number and ISRC
               recording
        12.5.5 TOC recording
   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
        12.6.4 Location of time code pack
        12.6.5 Details for recording sub code
        12.6.6 Rules of assemble-recording
   12.7 Application rules in playback situation
        12.7.1 Detection of identification code
        12.7.2 Mechanical conditions
        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
A Transmissivity of the prism
B Measurement method of the force required to open the
   slider
C Abbreviations
D Explanations

Abstract

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.