VooDoo DCR 6000, Planning & Installation Manual

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1. General DCR 6024/6128/6000
1 – 13 Planning and Installation – Rev. 1 / 7. 2001
1.6 FUNCTIONAL OVERVIEW
For details refer to block diagram
1.6.1 D–6 STANDARD
0,7 mm
0,5 mm
0,5 mm
19 mm
Tape motion
AUDIO CUE TRACK
CONTROL TRACK
TIME CODE TRACK
Audio sector 2nd record
Video sector
Audio sector
1st record
1 Cluster with 8 tracks
D-6
Track pattern
Video
Video/Audio gap
Fig. 107:D–6 Track pattern video
0,7 mm
0,5 mm
0,5 mm
19 mm
Tape motion
AUDIO CUE TRACK (not used)
CONTROL TRACK
Track–Set–ID and LAI (Longitudinal address information)
Rewrite area
Data sector
1 Cluster with 8 tracks
D-6
Track pattern
Data
HAI
Helical
Address
Information
Fig. 108:D–6 Track pattern data
The track pattern of the recorder contains the helical tracks with the video and au-
dio sectors (DTV mode) and rewrite area (data mode) divided in clusters of 8 tracks
each.
It is based on azimuth recording with a track pitch of 22
m which allows a max re-
cording capacity of 64 min or 500 GBytes with a L-type cassette.
The clusters are separated by guard bands from each other, allowing proper erase-
ment of the individual clusters with a single flying erase head for each cluster.
One field is the minimum edit distance for video audio and data in DTV mode. It is
divided into six (24/25 Hz) or five (30 Hz) clusters respectively. In data mode the
sytem uses the 25 Hz mode internally.
Helical tracks