NF EN 61595-2 : 1998

1 Scope
2 Normative references
3 Definitions
    3.1 Data flow of a digital audio tape recorder
4 Digital encoding
    4.1 Sampling frequency
    4.2 Sampling timing
    4.3 Quantization
5 Tape speed
6 Tape width and number of digital audio channels
7 Tape winding
8 Reel and hub
9 Allocation and dimension of magnetic tracks
10 Assignment of magnetic tracks
11 Emphasis
12 Main track recording
    12.1 Recording modulation method
          12.1.1 Rule 1 (centre transitions)
          12.1.2 Rule 2 (edge transitions)
    12.2 Signal block structure
          12.2.1 The word format
          12.2.2 The block structure
          12.2.3 The sync/control word
    12.3 Track-to-channel assignment
    12.4 Error protection method
          12.4.1 Interleaving and parity sums
          12.4.2 The CRC word
    12.5 Recording and reproducing characteristics
          12.5.1 Reference tape
13 Subtrack recording
    13.1 Time code channel (time code track)
    13.2 Auxiliary data channel
          13.2.1 Reference track
          13.2.2 Auxiliary data channel (auxiliary data
                  track)
    13.3 Auxiliary analogue channel (cue audio-1 track
          and/or cue audio-2 track
    13.4 Alignment of digital audio signals and subtrack
          signals
          13.4.1 Alignment of cue audio-1 and cue audio-2
                  track signals
          13.4.2 Alignment of time code track signal
          13.4.3 Alignment of reference track signal
Annex A Bibliography
Tables
1 Tape width and number of digital audio channels
2 Track assignment
3 Block structure
4 24-channel version
5 48-channel version
6 96-channel version
Figures
1 Data flow of the main audio channels of a DATR (digital
    audio tape recorder)
2 Recording channels of a DATR (digital audio tape
    recorder)
3 Reproducing channels of a DATR on magnetic tape (digital
    audio tape recorder)
4 Track pattern for DATR on magnetic tape (28 tracks with
    12.7 mm tape width)
5 Track pattern for DATR on magnetic tape (52 tracks with
    12.7 mm tape width)
6 Track pattern for DATR on magnetic tape (103 tracks
    with 25.4 mm tape width)
7 Emphasis characteristics
8 Rule 1 (centre transitions)
9 Rule 2 (edge transitions) case 1
10 Rule 2 (edge transitions) case 2
11 Rule 2 (edge transitions) case 3
12 Block address
13 The total signal block structure
14 Time diagram of the sync/control word
15 Computation of P and Q check words
16 Contents of one block, referred to one track input
    sequence
17 Range of CRC word
18 Biphase-mark coding rules
19 Word format of the reference track word
20 The synchronization pattern and definition of the
    beginning of a sector
21 Control word
22 Effective computation range of the CRC word

Applicable to 24 to 96 channel digital audio recording on 12.7 mm or 25.4 mm wide tape with stationary heads, for professional use. Specifies the mechanical and electrical characteristics need to ensure the interchangeability of programmes, recorded as digital audio signals on magnetic tape in professional industries.