HELICAL-SCAN COMPRESSED DIGITAL VIDEO CASSETTE SYSTEM USING 6,35 MM MAGNETIC TAPE - FORMAT D-12 - PART 1: VTR SPECIFICATIONS
International Electrotechnical Committee
FOREWORD
1 Scope
2 Normative references
3 Abbreviations and acronyms
4 Environment and test conditions
4.1 Environment
4.2 Reference tape
4.3 Calibration tapes
4.3.1 Tape
4.3.2 Record locations and dimensions
4.3.3 Calibration signals
5 Tape
5.1 Base
5.2 Width
5.3 Width fluctuation
5.4 Reference edge straightness
5.5 Tape thickness
5.6 Transmissivity
5.7 Offset yield strength
5.8 Magnetic coating
5.9 Coating coercivity
6 Helical recordings
6.1 Tape speed
6.2 Sectors
6.3 Record location and dimensions
6.4 Helical track record tolerance zones
6.5 Relative positions of recorded information
6.5.1 Relative positions of longitudinal tracks
6.5.2 Programme area reference point
6.6 Gap azimuth
6.6.1 Cue and control track
6.6.2 Helical track
6.7 Transport and scanner
7 Programme track data
7.1 General
7.1.1 Introduction
7.1.2 Labeling convention
7.1.3 Signal processing
7.1.4 Magnetization
7.2 Insert and track information (ITI) sector
7.2.1 Structure
7.2.2 ITI preamble
7.2.3 Start sync area (SSA)
7.2.4 Track information area (TIA)
7.2.5 ITI postamble
7.3 Audio sector
7.3.1 Structure
7.3.2 Audio pre and post-amble
7.3.3 Audio sync block
7.4 Video sector
7.4.1 Structure
7.4.2 Video pre and post-amble
7.4.3 Video sync block
7.5 Subcode sector
7.5.1 Structure
7.5.2 Subcode preamble and postamble
7.5.3 Subcode sync block
7.6 Edit gap
8 Audio processing
8.1 Introduction
8.2 Encoding mode
8.2.1 Source coding
8.2.2 Emphasis
8.2.3 Audio error code
8.2.4 Relative audio-video timing
8.2.5 Audio frame processing
8.3 Audio shuffling
8.4 Audio auxiliary data (AAUX)
8.4.1 AAUX source pack (AS)
8.4.2 AAUX source control pack (ASC)
8.5 Error correction code addition
8.5.1 Inner error correction code
8.5.2 Outer error correction code
9 Video processing
9.1 Introduction
9.2 Compressed macro block and data-sync block
9.3 Video auxiliary data (VAUX)
9.3.1 VAUX source pack (VS)
9.3.2 VAUX source control pack (VSC)
9.4 Error correction code addition
9.4.1 Inner error correction code
9.4.2 Outer error correction code
10 Subcode processing
10.1 Introduction
10.2 Subcode data
10.2.1 Time code pack ( TC )
10.2.2 Binary group pack ( BG )
10.3 Error correction code addition
11 Longitudinal tracks
11.1 Control track
11.1.1 Method of recording
11.1.2 Servo reference pulse
11.1.3 Flux polarity
11.1.4 Flux level
11.1.5 Pulse width
11.1.6 Servo reference pulse timing
11.1.7 Colour frame indication
11.2 Cue track
11.2.1 Method of recording
11.2.2 Flux level
11.2.3 Relative timing
Annex A (normative) Tape tension
Annex B (normative) Track pattern during insert editing
Annex C (normative) Cross-tape track measurement technique
Annex D (informative) Relationship between tape length and
recording time
Annex E (informative) Interface
Bibliography
Specifies the content, format, and recording method of the data blocks containing video, audio, and associated data which form the helical records on 6,35 mm tape in cassettes as specified in SMPTE 307M.
| Document Type | Standard |
| Status | Current |
| Publisher | International Electrotechnical Committee |
| Committee | TC 100 |
