Operation - evertz HD9155 Series Instruction Manual

3.

OPERATION

Videotapes acquired directly in field video recorders have the original field timecode recorded as linear
time code (LTC) on an address track and as RP188 ancillary timecode recorded in the HANC area of the
digital video bitstream. The Production Afterburner downconverts video from material acquired by HDTV
video cameras and makes burn-in windows and new 30 Fps timecode that is in sync with the
downconverted video. The original 24 Fps timecode numbers can be placed in the user bits of the VITC
and displayed as a burned-in window. The 2:3 cadence can be controlled from the ancillary timecode or
from the LTC.
The HD9155 Production Afterburner allows the user to load a factory default configuration or to load a
user defined configuration that has been loaded using the 9150 Configware™ software. The user defined
configuration will be remembered after a power cycle and will be reloaded every time the
CONFIGURATION front panel switch is set to the User position. For more information on controlling the
HD9155 using the 9150 Configware™ software see chapter 4.
The factory defaults are:
•
Auto Video Standard
•
Incoming VTR Time Code (Time and User Bits) will be taken from RP188 LTC ANC Timecode. For
1080p/24sF input video this is the 24 Fps code.
•
Output timecode is delayed to match the video delay through the HD9155 (5 frames at the output
video frame rate). For 1080p/24sF input video the output timecode is 30 Fps code jammed to the 24
Fps input Timecode. For other input video formats the output code will be at the same frame rate as
the input code.
•
Output LTC Time will be the at the frame rate of the output video jammed to the input RP188 ANC
Timecode. Output LTC User bits will be the same as the input RP188 ANC User Bits.
•
Output VITC will be on lines 14 and 16. VITC Time will be the same as the LTC time. VITC User Bits
will be the original RP188 input code
•
A white Flag pulse in the first field of each new picture will be on line 11
•
The downconverter will operate in the Letterbox mode
•
The character generator will be in Tiny size with the Video Time (VITC time at output video frame rate),
Video User Bits (VITC user bits at input video frame rate) and pulldown windows On
•
When the input video is 1080p/24sF, the output video will have a 2:3 pulldown cadence set according
to the following priority scheme:
6 Hz input (normally on pin 1 of the Parallel I/O connector - not usually required in Video Mode)
LTC input if present
RP 188 ANC timecode if present
If you need to override the default settings you will need to connect a computer to run the 9150
Configware™ software utility. (See section 4 for information about connecting the computer and installing
the 9150 Configware™ software)
Afterburner on a day to day basis unless you need to change any of the configuration items.
The output video will contain a 2:3 cadence of pictures from the input 1080p/24sF video with the A frames
determined from the timecode being read by the HD9155. By default, if there is LTC present then it will
control the pulldown, otherwise the RP188 ancillary timecode will control the pulldown.
pulldown cadence can be changed using the HD9155 system parameters, but should not be necessary
under most circumstances. Figure 3-1 shows the default 2:3 relationship. Note that there is a 5 video
frame (30 Fps) delay between the input video and the output video.
OPERATION
Model HD9155 Production Afterburner Manual
There is no need to run the software to operate the Production
Revision 1.3
The default
Page 3-1