I.S. EN 61327:1999

FOREWORD
INTRODUCTION
1 General
   1.1 Scope and object
   1.2 Normative references
   1.3 Definitions, symbols and abbreviations
2 Technical data
   2.1 Environment and test conditions
   2.2 Reference tape
   2.3 Calibration tape
       2.3.1 Record locations and dimensions
       2.3.2 Calibration signals
       2.3.3 Purchase
3 Video tape cassette
   3.1 Mechanical parameters
       3.1.1 Cassette dimensions
       3.1.2 Identification of cassettes
       3.1.3 Tape length, thickness and play times
       3.1.4 Coating face
       3.1.5 Datum planes
       3.1.6 Window and labels
       3.1.7 Identification holes
       3.1.8 Leader/trailer tape
       3.1.9 Reels
       3.1.10 Lid
   3.2 Video tape specification
       3.2.1 Base
       3.2.2 Width
       3.2.3 Width fluctuation
       3.2.4 Reference edge straightness
       3.2.5 Tape thickness
       3.2.6 Transmissivity
       3.2.7 Offset yield strength
       3.2.8 Magnetic coating
       3.2.9 Coating coercivity
       3.2.10 Particle orientation
4 Helical recordings
   4.1 Tape speed
   4.2 Erase head and record location and dimensions
       4.2.1 Erase head
       4.2.2 Record location and dimensions
       4.2.3 Reference edge
       4.2.4 Track pitch
       4.2.5 Flying erase heads
   4.3 Helical track record tolerance zones
   4.4 Relative positions of recorded signals
       4.4.1 Relative positions of the longitudinal tracks
       4.4.2 Helical/control track relationship
       4.4.3 Programme area reference point
   4.5 Gap azimuth
       4.5.1 Cue track, control track, time and control code track
       4.5.2 Helical track
   4.6 Transport and scanner
5 Programme track data arrangement
   5.1 Introduction
   5.2 Labelling convention
   5.3 Sector details
       5.3.1 Sync block
       5.3.2 Sync pattern
       5.3.3 Identification pattern
       5.3.4 Data field
       5.3.5 Sector preamble
       5.3.6 Sector postamble
   5.4 Edit gaps
   5.5 Channel coding
       5.5.1 Coding rules
       5.5.2 Data rate and wavelength
   5.6 Magnetization
       5.6.1 Polarity
       5.6.2 Recorded equalization
       5.6.3 Record level
6 Video interface
   6.1 Encoding parameters
   6.2 Parallel digital signal interface
7 Audio interface
   7.1 Encoding parameters
       7.1.1 Sampling
       7.1.2 Reference level
   7.2 Digital signal interface
8 Video processing
   8.1 Recorded and non-recorded data
       8.1.1 Recorded samples of digital active line and
             lines of the television frame
       8.1.2 Non-recorded data
       8.1.3 Source pre-coding
   8.2 Channel distribution of samples
   8.3 Shuffling
       8.3.1 Introduction
       8.3.2 Algebraic definition
   8.4 Field data array
   8.5 Outer error protection
   8.6 Order of transmission to inner coding
9 Audio processing
   9.1 Introduction
   9.2 Source coding
   9.3 Source processing
       9.3.1 Introduction
       9.3.2 Relative audio-video timing
       9.3.3 Audio data in fields
       9.3.4 Intra-field shuffling
       9.3.5 Block shuffling
       9.3.6 Audio data word processing
   9.4 Auxiliary words
       9.4.1 Channel use (CHAN)
       9.4.2 Pre-emphasis (PREF)
       9.4.3 Audio data word mode (LNGH)
       9.4.4 Block sync location (S MARK)
       9.4.5 Field number count (FNCT) for 525/60 system
       9.4.6 Edit flag (EFLG)
   9.5 Outer error protection
   9.6 Inner protection
   9.7 Order of transmission to inner coding
   9.8 Channel code
   9.9 Allocation of audio sectors
10 Longitudinal tracks
   10.1 Relative timing
        10.1.1 Time and control code input
        10.1.2 Time and control code information
        10.1.3 Cue information
        10.1.4 Control track servo pulse
   10.2 Control track
        10.2.1 Method of recording
        10.2.2 Servo reference pulse
        10.2.3 Flux polarity
        10.2.4 Flux level
        10.2.5 Pulse width
        10.2.6 Servo reference pulse timing
        10.2.7 Colour frame pulse
        10.2.8 Video frame pulse
   10.3 Cue record
        10.3.1 Method of recording
        10.3.2 Flux level
   10.4 Time and control code record
        10.4.1 Method of recording
        10.4.2 Flux level
        10.4.3 Input signal
Figures
Annexes
A - Cross-tape track measurement technique
B - Track pattern during insert editing
C - Bibliography
Annex ZA (normative) Normative references to international
         publications with their corresponding European
         publications

Covers the content, format and recording method of the data blocks forming the helical records on the tape containing video, audio and associated data using the 12,65 mm (0,5 in) type D-3 cassettes.