MULTICHANNEL DIGITAL AUDIO TAPE RECORDER (DATR), REEL-TO-REEL SYSTEM, FOR PROFESSIONAL USE - PART 2: FORMAT B
International Electrotechnical Committee
FOREWORD
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 dimensions 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 (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 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 24-96 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 needed to give interchangeability of programmes, recorded as digital audio signals on magnetic tape, in professional industries.
| Document Type | Standard |
| Status | Current |
| Publisher | International Electrotechnical Committee |
| Committee | TC 100 |
