HD9084 HDTV Caption Encoder Manual
OPERATION
Page 3-19
Keyer control for SD-SDI VANC CDP insertion will follow the HD KEYER button and GPI control
settings, not the SD KEYER button and GPIs. The SD-SDI VANC CDP Keyer is disabled from factory
defaults. CDPs will not be keyed onto SD-SDI VANC if serial Port B is set to output caption data via
SMPTE-333 or Grand Alliance protocols. This behavior is identical to the HD-SDI VANC CDP keyer.
SD-SDI VANC CDP READER
VANC CDPs will be extracted from the upstream source indicated under the
VIDEO
→
UPSTREAM CAPS
input source setup controls. Refer to section 3.4.4 for setting these controls. If HD-SDI video is
present, the HD VIDEO/DATA IN LED is on. This LED will flash to indicate that CDPs are being
ingested, even if they are coming from from SD-SDI VANC. If HD-SDI video is not present, the HD
VIDEO/DATA IN LED is off. In this case, the presence of upstream CDPs on SD-SDI VANC can only
be verified by viewing the decoder video output, or via serial port using the ^A5 command.
GENERAL NOTES
Currently these features are only tested for SD-SDI at NTSC rate (525i/59.94). The HD9084 firmware
would need to be revised to support 1080i/50 on the HD-SDI video path in order to properly test PAL
rate (625i/50). Most SD-SDI equipment has not been designed to recognize VANC packets, since they
are seldom used in SD applications.
It is likely that downstream equipment and storage devices
will corrupt or remove the CDPs inserted by the HD9084, or will incorrectly indicate an error
condition in the video.
These features have added another 7 video samples of delay to the SD-SDI
video path through the HD9084. HD-SDI and SD-SDI video sources must be frame-locked for accurate
transposing of data between HD-SDI and SD-SDI.
Tektronix WFM700 with firmware v3.0.0B or newer is capable of reading CDPs (DID:SDID=61:01) from
SD-SDI VANC. The CEA-608 caption decoder is capable of displaying the CEA-608 data contained in
the packets.
3.4.2.9.
CC Erase Timer
The CC Erase Timer control is used to erase the caption display. When enabled, the HD9084 will
activate an internal timer and clock the time delay between processing caption data. If caption data is
not detected for a period of 15 seconds, the HD9084 will encode a clear caption command. This
command will be used by downstream decoders to clear the caption display. This control can either be
enabled or disabled from the front panel.
3.4.3.
HD Captions/VANC
The HD Captions/VANC menu allows the user to setup and configure downstream HD VANC captions
(SMPTE 334M). To enter the HD Captions/VANC sub-menu, use the
UP
and
DOWN
arrows until HD
CAPTIONS/VANC is displayed on the front panel. Press
SELECT
to enter this menu. The following
options are available in the HD Captions/VANC sub-menu (see section 3.4.3.1 to 3.4.3.7). To view a
“quick reference” layout of the menu system, please refer to section 3.4. Press
SETUP
to exit this level.
3.4.3.1.
VANC CC Line Sel
VANC CC Line Select controls the line insertion of downstream HD VANC captions. The HD VANC
caption (SMPTE 334M) is inserted as default in line 9 of the downstream HD video. Lines 7 through 24
are available.
USO
RESTRITO
Summary of Contents for hd9084
Page 2: ...This page left intentionally blank USO RESTRITO ...
Page 6: ...This page left intentionally blank USO RESTRITO ...
Page 18: ...HD9084 HDTV Caption Encoder Manual OVERVIEW This page left intentionally blank USO RESTRITO ...
Page 120: ...HD9084 HDTV Caption Encoder Manual GLOSSARY This page left intentionally blank USO RESTRITO ...
