EVS Broadcast Equipment SA
13
Block schematic
INTERNAL SYNAPSE BUS
GXG400 – GXG410
[QUAD SPEED AUIO BUS]
RACK
CONTROLLER
REFERENCE
INPUTS
1
2
µP [LINUX]
CHANNEL A
MOQD
UP/DOWN/CROSS
- ARC - BYPASS -
PLL
WSS-VI-S2016
DETECTION
EQ
EQ
3Gb/s. HD, SD OUT 2
3Gb/s, HD, SD OUT 4
DUAL CHANNEL SFP
4X10
16 CH (TOP LEFT)
DE-EMBEDDING
EMBED
16 CH
WSS-VI-S2016
VANC FORMAT
INSERT
16 CHANNEL
GAIN, DELAY PHASE
(GXG410 ONLY)
QUAD SPEED
MULTIPLEXING
AUDIO BUS
32CH
OUT
32CH
IN
TO
A
D
D
-O
N
F
R
OM
A
D
D
-ON
FRAME SYNC,
2s 3Gb/s
OFFSET DELAY,
COLOR CORR.
LEFT
TOP
SCALER
TDM
MUX
TDM
DE-MUX
DUAL CHANNEL SFP
VANC DECODING
AUDIO ROUTING: PRESET BASED
48X48 AUDIO MUX
(GXG410 ONLY)
SFP+
EQ
EQ
OPTIONAL
DUAL 10G-
ETHERNET
FOR FUTURE
USE
S2022/AVB
RIGHT
TOP
SCALER
LEFT
BOTTOM
SCALER
RIGHT
BOTTOM
SCALER
10X4
3840 X 2160
TO
1920 X 1080
4 QUADRANT
SCALER
SFP+
Important
notice about
closed captions
Historically, closed captions were transmitted in NTSC line 21 according to EIA-
CEA-608-B (bit rate 960b/s). This allowed two caption data bytes per field to be
transmitted. With the introduction of HD and 3Gb/s the new EIA-708-B Closed
Caption standard was created, which sends closed caption data in DTVCC packets.
This allows sending more data per field (bit rate 9600b/s) for extended language,
color support, PMT and EIT and timecode data.
Besides the new DTVCC packets, the EIA-708-B caption stream may also include
EIA-CEA-608-B data bytes which are stored as NTSC compatibility bytes for
compatibility with old decoders.
EIA-CEA-608-B Transparency
This card is fully transparent to EIA-CEA-608-B caption streams.
EIA-CEA-608-B to EIA-708-B Translation
For EIA-CEA-608-B to EIA-708-B translation, the EIA-CEA-608-B bytes will be
mapped on-one-on to the NTSC compatibility bytes. Furthermore, the EIA-CEA-608-
B bytes will be remapped to DTVCC packets.
EIA-708-B to EIA-CEA-608-B Translations
There are EIA-708-B DTVCC captions which are not translatable to EIA-CEA-608-
B. Therefore the NTSC compatibility bytes will be used for EIA-708-B to EIA-CEA-
608-B translation. So the DTVCC packets from the input will be ignored.
EIA-708-B Transparency
This card is not fully transparent to EIA-708-B caption streams. The NTSC
compatibility bytes are transparent, but the DTVCC packets are regenerated from the
NTSC compatibility bytes. So the DTVCC packets from the input will be ignored.
Note for EIA-708-B DTVCC output caption data:
Only supports EIA-CEA-608-B translation of the primary language (CC1). So CC2
to CC4, T1 to T4 and XDS translations are not supported.