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3.10
FILM EDGE CODE FUNCTIONS
OPERATION
It is recommended that two non-adjacent lines be used, however adjacent
lines and a single line (selected when both lines are the same) are permitted.
3.9.8
Selecting the Lines to Record VITC on - (3 Line VITC Standard)
When the generator assignment is set to 3 LINE VITC STD, two blocks of 3
lines are encoded. The first VITC line follows the LTC generator, except
that it is updated at the field rate instead of the frame rate. The second
VITC line is used to encode the full KeyKode edge number including
frames and pulldown information. The third line is used to encode the RDR
2 time and user bits. (See section 0 for a complete description of the 3 line
VITC mode).
Although the actual choice of lines is up to the user, the following line
ranges are recommended.
Block 1
Block 2 (optional)
White Flag (optional)
3.9.9 Turning the VITC Generator On
The VITC key is used to turn the VITC keyer on and off. When the VITC
generator is Off, the program video passes through the VITC keyer with
nothing added. When the VITC generator is On, the primary VITC will
always be added. In addition, the secondary VITC and white flag pulse will
be added if they are enabled (using the Format menu).
Latent edge numbers have been present on motion picture negative film
stocks for many years in human readable form.
format has been specific to various manufacturers and film stock types. In
1988, Eastman Kodak, in conjunction with the Society of Motion Picture
and Television Engineers devised a new edge print that not only
standardizes the numbering format, but is also printed as a machine
readable barcode. Kodak calls this numbering system KeyKode. Other
film manufacturers have adopted this numbering standard and have each
given their version a proprietary name. For the sake of clarity we shall
refer to all of these implementations as KeyKode.
See section 3.9.1 for a discussion of how your VTR's generator may affect
the accuracy of edge numbers encoded into the user bits.
Model 4025 Film Footage Encoder Manual
NTSC
18-19-20
13-14-15
12
PAL
19-20-21
14-15-16
12
The edge numbering
Page 44
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