Film Edge Code Functions - evertz 4025TR Instruction Manual

3.10 FILM EDGE CODE FUNCTIONS

!
OPERATION
always be added. In addition, the secondary VITC and white flag pulse will
be added if they are enabled (using the setup 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.
The 4025TR also has two logical film number generators – Film edge
numbers (Keykode) and Ink numbers. The film number generators are
driven by the telecine biphase and update at the film transfer rate,
accurately tracking the 2/3 pulldown in NTSC 24 frame per second
transfers. The Ink number logical generator is typically used to track
footage and frame numbers that are stamped on the edge of print film
stocks. Initial values at the beginning of the roll can be entered from the
front panel. The KeyKode logical generator is typically used to track latent
edge numbers on the film stock.
updated from the telecine biphase, and may optionally be updated from
KeyKode information coming from an external KeyKode reader.
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.
When the 4025TR is in local mode, it can be configured to encode
information from the KeyKode logical generator into the LTC and VITC
outputs in one of several formats. The GEN ASSIGN menu item controls
the where the KeyKode information will be encoded (which VITC line). The
EDGE STYLE and EDGE FORMAT menu items control the format of the
KeyKode data. The 4025TR can only encode the Ink number register into
the LTC and VITC outputs when it is configured from the KeyLog
TRACKER™ software. If ink number information must be encoded in local
mode, follow the procedure outlined in section 3.10.4.
Model 4025TR Film Footage Encoder Manual
The film edge numbers are always
The edge numbering
Page 3-43