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Model 4025 Film Footage Encoder Manual
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 4025 Film Footage Encoder interfaces to external KeyKode readers
manufactured by Evertz Microsystems, ARRI, Cinema Products or
Research In Motion. Each of these units consist of a bar code reader
pickup head, and a decoder device.
The pickup head transforms the
optical dark and light bar code into electronic signals and is designed to
mount on the telecine feed roller just before the film enters the gate. The
decoder receives these electronic signals from the pickup head, and sends
the decoded KeyKode number via a serial link to the 4025. The 4025 Film
Footage Encoder automatically 'jams' the edge numbers into the time code
user bits or the secondary VITC.
When installing the pickup head on the telecine, an automatic alignment
procedure in the 4015 calculates the exact perforation offset between the
head and the gate. This calibration procedure must be performed before
the 4025 will use the KeyKode information it receives. The 4025 maintains
separate head offset values for 16 mm and 35 mm film types for each
transfer speed. Once calibrated, the 4025 automatically uses the correct
head offset value for your configuration. The head offset calibration is
normally only required during installation. A summary of the Head offsets
is available using the KK HEAD OFFSET item in the CONFIG drop down
menu of the Format menu. (See section 2.13.3 for a full description of the
head offset learning process).
3.11.1 Selecting When the Barcode Numbers Update the Edge
number Information
Selection of the way in which data received from the KeyKode reader will
affect the edge number information is performed using the Format menu
displayed on the character generator. This setting is only applicable if the
generator is set to one of the EDGE or + KEYKODE modes. When KK
JAM is set to ONCE, PLAY, or ALWAYS, the KeyKode numbers are read
by the bar code reader and inserted with the appropriate offset
compensation. The complete KeyKode number may be displayed in the
character generator or placed into the secondary VITC. A truncated film
bar code number may be placed in the user bits in one of the EDGE
modes.
Press the FORMAT key to access the Format menu. Using the
&
keys drop down the FILM menu. Use the
&
keys to highlight the KK
JAM menu item and press the SELECT key to show the KK JAM sub
menu. The currently programmed KeyKode jam mode is shown in reverse
video. Press the
&
keys one or more times to select the desired
KeyKode jam mode. Press the FORMAT or CLR keys to exit the format
menu, or press the SELECT key to return to the FILM drop down menu.
OPERATION
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