NF EN 61122 : 1994

Cooperating organizations
National foreword
Foreword
1. General
1.1 Scope
1.2 Normative references
1.3 Environment
2. Jacket
2.1 Datum areas, datum holes and datum planes
2.2 Flatness of jacket
2.3 Appearance of jacket
2.4 Hub
2.5 Spindle
2.6 Shutter mechanism
2.7 Contact between disk and jacket
3. Disk
3.1 Dimensions
3.2 Physical properties of disk
3.3 Recording characteristics
3.4 Reference disk and sub-reference disk
4. Track pattern
4.1 Recording surface
4.2 Main track
4.3 Cue track
4.4 Track configuration
5. Video recording format
5.1 Frequency spectrum allocation of recording signals
5.2 Recording of luminance component
5.3 Recording of chrominance component
5.4 Time difference between luminance and chrominance
      signals
5.5 Multiplex recording of identification codes
5.6 Track allocation
6. Audio recording format
6.1 Block diagram for audio recording
6.2 Time compression ratio
6.3 Signal arrangement
6.4 FM signal recording characteristics
6.5 Pre-emphasis and noise reduction
6.6 Control code
7. Data recording format
7.1 Channel bit rate
7.2 Formatted recording capacity
7.3 Track format
7.4 Sector format
7.5 Frame format
7.6 Sub-code
7.7 Modulation
7.8 Error detection and correction scheme
8. Cue track application format
8.1 Cue file
8.2 Directory system file
8.3 Cue track system file
8.4 Auto playback file
8.5 Text file
Annex A
National annex NA (informative) Committees responsible

Provides technical requirements for still video floppy disk systems that use a magnetic disk in a jacket (a still video floppy disk). Specifies physical requirements for the jacket and the magnetic disk, and magnetic requirements for the magnetic disk. Also specifies the signal recording formats of analogue picture, time-compressed audio signals, control information and digital recorded on the magnetic disk to ensure interchangeability of the recorded disk. Coverage includes hub, spindle, shutter mechanism, recording characteristics, recording surface, cue track, main track, track allocation, signal arrangement, control code, modulation and text file.