evertz 3025EMC - Frame Delay; Video Transition Offset; Figure 4-8: Video Transition Offset 0

3025EMC Master Control Switching & Channel Branding
Revision 3.0.3 Page 43
4.3.8. Frame Delay
Frame Delay: Enables you to select a frame delay for the input to output of the EMC. This
allows users to fix the delay that the EMC will introduce in the program path.
When set to 0(hardware default), the EMC will use the minimum delay based on
the hardware fitted. Additional frames added in this drop-down menu will be in
addition
to this minimum delay.

NOTE: The default I/O frame delay (no Dolby-E processing) for the 3025EMC is 2
Frames.
4.3.9. Video Transition Offset
Video Transition Offset: The default value for the Video Transition Offset is 0. When this parameter
is 0 the video and audio transitions will start with defult timing. Using a V-Fade
transition as an example, both the audio and video will begin to fade at exactly the
same time with respect to when the transiton start command was received from
automation.
ODD FIELD
EVEN FIELD
ODD FIELDEVEN FIELD
FRAME
FRAME
AUDIO TRANSITION
STARTS HERE
VIDEO TRANSITION
STARTS HERE
TX START RECEIVED
DURING FIRST 13mS
OF THE FRAME
VIDEO
M2100
AUDIO
Figure 4-8: Video Transition Offset 0
If the Video Transition Offset is 1 there will be an offset between the video
transition start and audio transition start. The audio transition will start at the
expected time with respect to the transition start and the video will start one field
(interlaced frame/progressive frame) later. The duration of the video and audio
transitions will not be affected, i.e. if the duration is 12 frames then the duration of
both video and audio transition will be 12 frames.