MULTICHANNEL DIGITAL AUDIO TAPE RECORDER (DATR), REEL-TO-REEL SYSTEM, FOR PROFESSIONAL USE - PART 1: FORMAT A
International Electrotechnical Committee
Contents
Foreword
Clause
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
12.2 Signal block structure
12.2.1 The word format
12.2.2 The frame and block structure
12.2.3 Synchronization pattern
12.3 Signal word distribution to tracks
12.4 Error protection method
12.4.1 The error correction code
12.4.2 Interleave sequence
12.5 Recording and reproducing characteristics
12.5.1 Reference tape
13. Subtrack recording
13.1 Auxilliary channels
13.1.1 Time code channel (time code track)
13.1.2 Auxilliary data channel (auxilliary
data track)
13.1.3 Auxilliary analogue channels (cue
audio-1 track and cue audio-2 track)
13.2 Alignment of digital audio signals and subtrack
signals
13.2.1 Alignment of cue audio-1 and cue
audio-2 track signals
13.2.2 Alignment of time code track signals
Annex A - Bibliography
Tables
1 Tape width and number of digital audio channels
2 Track assignment
3 4/6M conversion table
4 Track interleave (20 main tracks with 12,7 mm tape
width)
5 Track interleave (40 main tracks with 12,7 mm tape
width)
6 Track interleave (40 main tracks with 25,4 mm tape
width)
7 Track interleave (80 main tracks with 25,4 mm tape
width)
Figures
1 Recording channels of a DATR (digital audio tape
recorder)
2 Data flow of the main audio 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 (24 tracks with
12,7 mm tape width)
5 Track pattern for DATR on magnetic tape (47 tracks with
12,7 mm tape width)
6 Track pattern for DATR on magnetic tape (45 tracks with
25,4 mm tape width)
7 Track pattern for DATR on magnetic tape (89 tracks with
25,4 mm tape width)
8 Emphasis characteristics
9 Frame and block structure
10 Synchronization pattern
11 Signal word distribution to tracks
12 Symbol and word structure
13 Example of input data V1
14 Main-frame interleave (tape speed I)
15 Main-frame interleave (tape speed II)
16 Code interleave
Applicable to 8 to 64 channel digital audio recording on 12,7 mm or 25,4 mm wide tape (hereafter called tape), with stationary heads, to be used professionally. Defines the electrical and mechanical characteristics that are necessary to ensure the 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 |
