Table of Contents
Advertisement
Introduction
Video Functions Description
9083-ENC-OM (V4.4)
Frame Sync Function
This function provides for frame sync control using either one of two external
reference signals distributed with the card frame, or the input
EXT REF IN (1,2)
video as a frame sync reference.
This function also allows horizontal and/or vertical offset to be added
between the output video and the frame sync reference.
A video/audio delay offset function allows adding or reducing audio delay
from the matching video delay. This function is useful for correcting lip sync
problems when video and audio paths in the chain experience differing
overall delays. A Reset Framesync function resets the frame sync following
any horizontal or vertical offset changes, clearing any buffered audio and
video and re-establishing the frame sync. The 9083 re-establishes video/audio
sync following framesync changes by applying an offset in small, progressive
amounts to provide a seamless, glitch-free retiming. A user-selectable hard
resync function allows setting a threshold at which hard resync is applied if
audio-video offset exceeds the threshold. Hard resync provides fastest
snyc-up suitable for off-air manipulation. Conversely, a threshold setting that
avoids hard resync allows glitch-free on-air manipulation.
In the event of input video loss of signal, this function provides for disabling
the video, going to a desired color raster, or freezing to the last intact frame
(frame having valid SAV and EAV codes).
AFD Inserter
This function provides for assignment and insertion of AFD codes into the
SDI output video. Using this function, AFD codes in accordance with the
standard 4-bit AFD code designations can be applied to the output video.
This function checks for any existing AFD code within the received video
input. If a code is present, the code is displayed. When used in conjunction
with a separate downstream card capable of providing AFD-directed scaling,
the image can in turn be scaled in accordance with the AFD coding embedded
by this card.
The function also allows the selection/changing of the AFD code ancillary
data line number for the outputted AFD code.
Timecode Processor
(See Figure 1-2.) This function provides for extraction of timecode data from
the input video, and in turn re-insertion of timecode data into the output SDI.
The function can monitor the SDI video input of the card for supported
timecode formats, and then select and prioritize among SDI VITC,
SDI ATC VITC, and SDI ATC LTC timecode sources. If the preferred format
is detected, the preferred format is used by the card; if the preferred format is
not detected, the card uses other formats (where available) as desired.
9083 (WITH DOLBY ENCODING OPTION) PRODUCT MANUAL
9083 Functional Description
1-7
Advertisement
Table of Contents
Troubleshooting
