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3.3 PROGRAMMING THE BASIC OPERATIONAL MODES - THE TIMECODE MENU
OPERATION
Figure 3-9: Overview of the Toolbox Menu
Each of the menu items is described in the following sections, with an
explanation of what each choice does. Section 3.6 describes the items on
the HARDWARE drop down menu. Section 3.7 describes the items on the
PARAMTERS drop down menu. Section 3.8 describes the items on the
DEBUG drop down menu.
The TIMECODE menu is used to configure the basic operational modes of
the 4025TR Film Footage Encoder such as selecting what information is
put into the LTC and VITC generators, setting VITC line numbers for the
generator, assigning the LTC and VITC readers, etc.
description of the Time code functions of the 4025TR see section 3.9.
Use the Codes and Outputs Tabs of the Configuration screen to configure
the items on the Time Code menu.
KeyKode numbers contain more information than will fit into the normal
user bits. Evertz has developed the two-line VITC format that permits the
complete Keykode number to be encoded IN each field (without
multiplexing) into a special pair of VITC lines. In these 'two-line' modes,
the Primary VITC (VITC1) contains the Video tape or 'editorial' timecode
with the production sound timecode in the user bits. The secondary VITC,
(VITC2) carries the full film Key number, including frames, and pulldown
information. Because of the field rate of VITC, this information accurately
reflects what is happening with the 3/2 pulldown during the transfer. The
VITC2 information is encoded with a modified CRC. This is important
because the Time bits of the VITC2 lines contain information that is not in
the standard timecode format, and would be confusing to edit controllers.
In conjunction with other manufacturers, Evertz has developed a 3-line
VITC format. The 3-line format allows readers to automatically detect the
film type, film gauge, transfer rate as well as providing room to encode the
VTR Time, film Keykode, pulldown and the production time code and user
bits. The encoded data is contained in a block of three consecutive lines of
the vertical interval. There is an optional block of 3 lines for redundancy.
Off-line transfers can now be edited without burn-ins to obstruct the picture.
Video and production timecode and Key number information can be
extracted from the VITC after editing by the Afterburner Dual VITC reader,
providing a field accurate cutting copies with film Key numbers burned in.
Model 4025TR Film Footage Encoder Manual
For a complete
Page 3-12
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