DTV CAPTION
SUMMIT
14 MARCH 01
SESSION ON PRODUCT SUPPORT
norpak corporation
© norpak corporation 2001
14 MAR 01
norpak
 Developed
first caption solutions in 1982
 Over 3,400 encoders in 42 countries
 Analog, serial digital, HD encoders
 NTSC/PAL, 608/708, HDSDI bridges
 PC card ISA/PCI, rackmount receivers
© norpak corporation 2001
14 MAR 01
CAPTIONING EQUIPMENT

ENCODERS
•
•
•
•
•
•

RECEIVERS (ALSO MONITORING SOFTWARE)
•
•
•
•

TES3 - analog – NTSC/PAL/SECAM
TES5 - serial digital - CCIR601/SMPTE259
TES7 - HD serial digital – SMPTE334/292
NES3 - Nielsen analog also called NUE
NES5 – Nielsen serial digital also called DNUE
NES6 – Nielsen SDI + audio also called NAVE
TTX81X – analog RF/basebcand ISA bus card
TTX83X – analog RF/baseband PCI bus card + multiple rack mount
TTX85X – analog RF/baseband rack mount
TTX87X – SDI/analog baseband PCI card +multiple rack mount
BRIDGES
•
•
•
•
VDB7 – analog 608 to compression system 708
ADB7 – SMPTE 292/259/292 baseband for storage of captions
TES3/TES5 –between signals and between standards
TES7 – SMPTE334M data from SMPTE292M to compression 708
© norpak corporation 2001
14 MAR 01
‘STICKY’ DATA
 Most solutions are focussed on adding data at the
point of emission. This is fine for data which is
unrelated to the video/audio
 ‘Sticky’ data is content that needs to ‘stick’ with the
V/A as it travels through multiple plants on its way
from the creator to broadcast
 Needs to be transparently stored and retrieved
without the complications of locating it on a server
somewhere. Delays of seconds, hours, days are
commonplace - and what about years down the road?
© norpak corporation 2001
14 MAR 01
FORWARD / BACKWARD
COMPATIBILITY



Whether the signal is analog, serial digital or HDTV
the ‘sticky’ data interface should be identical
Applications such as captioningshould interface to
the data encoder in the same way regardless of the
TV standard used
Makes the move from analog to digital or HDTV
simple and straightforward .
© norpak corporation 2001
14 MAR 01
CAPTION DELIVERY ARCHITECTURE
CAPTIONS ADDED TO
ORIGINAL PROGRAM
LOCAL STATION
MAY ADD LOCAL
CAPTION DATA
NETWORK MAY ADD
CAPTIONING DATA
CAPTION
CREATION
NETWORK
HEADEND
CONTRIBUTION
LOCAL
STATION
Broadcast
DISTRIBUTION
Videotape
© norpak corporation 2001
14 MAR 01
TYPICAL CAPTIONING OPERATION
Analog
Video
VTR
TES3 Encoder
Time
Code
608
Caption
Server
Analog
Video
+
EIA-608
Captions
SDI (259M)
Video
+
EIA-608
Captions
SDI (259M)
Video
VTR
TES5 Encoder
Time
Code
RS232,
10-baseT,
modem
ANALOG VIDEO (E.G. NTSC)
© norpak corporation 2001
608
Caption
Server
RS232,
10-baseT,
modem
SERIAL DIGITAL (SDI) VIDEO
(SMPTE 259M)
14 MAR 01
TES3 / TES5 ENCODER
© norpak corporation 2001
14 MAR 01
LANGUAGES - PART 1
At the Caption Server to Caption Encoder interface:





The interface for VBI closed captioning is the de facto standard
“Control-A” command protocol
Contains enough information to allow an NTSC caption encoder to
insert EIA-608 captions and other services in the VBI
Also contains enough information to allow a DTV caption encoder to
insert “608 compatibility” and “derived 708” captions into a DTV
stream
Does not provide for full-blown EIA-708 DTV captions
Does not provide for Caption Descriptors
A new standard was needed...
© norpak corporation 2001
14 MAR 01
LANGUAGES - PART 2
The Caption Distribution Packet (CDP)




EIA-708-B defines the CDP
Contains (optionally present) fields for:
EIA-608 caption data (“608 compatibility bytes”)
DTV caption data
Caption Descriptor
Time Code
Intended to be used throughout the professional portion of the DTV
distribution infrastructure
Can be carried through various types of link: e.g. RS232 server-toencoder, or embedded in VANC...
© norpak corporation 2001
14 MAR 01
LANGUAGES - PART 3
Vertical Ancillary (VANC) data




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SMPTE 291M specifies a method for embedding data in a serial
digital video signal
VANC is analogous to VBI in analog video
VANC is usable in SDI (SMPTE 259M) and HD-SDI (SMPTE 292M)
VANC data is “sticky”; it accompanies, and remains synchronized
with, the baseband video and audio signals as they are routed,
recorded and switched.
SMPTE 334M specifies how to code the VANC data, assigns
addresses to specific services, and specifies that captioning data is
carried as CDPs.
© norpak corporation 2001
14 MAR 01
TES7
THE MISSING (608-TO-708) LINK
HD-SDI (292M)
Video
VTR
TES7 Encoder
HD-SDI (292M)
Video
+
SMPTE 334M
Captions
CDPs in 334M
VANC packets
Time
Code
608
Caption
Server
RS232,
10-baseT,
modem
TES7 accepts caption
commands, and inserts
334M VANC data into 292M
“Control-A”
commands
© norpak corporation 2001
14 MAR 01
LANGUAGES - PART 4
At the MPEG Encoder input:





Many ATSC program encoders have an RS232 port for caption data
input.
First protocol was the “Grand Alliance” (GA), which uses a “push”
model: data is fed to the encoder which embeds it as soon as possible.
SMPTE 333M is a “pull” protocol: the encoder requests a caption when
it needs one.
Encoder manufacturers have implemented one or both of these.
Apparently, none has yet implemented EIA-708-B CDPs, either in
RS232 or 334M VANC...
© norpak corporation 2001
14 MAR 01
TES7
THE MISSING (292M-MPEG) LINK
292M
+
334M
292M
TES7 Encoder
TES7 extracts 334M
VANC data and produces
RS232 caption data for
the MPEG encoder
© norpak corporation 2001
MPEG
Encoder
MPEG TS
RS232 Captions
GA or SMPTE 333M
14 MAR 01
DATA DELIVERY ARCHITECTURE
CAPTIONS ADDED TO
ORIGINAL PROGRAM
CAPTION
CREATION
CONTRIBUTION
NETWORK MAY ADD
CAPTIONING DATA
LOCAL STATION
MAY ADD LOCAL
CAPTION DATA
NETWORK
HEADEND
LOCAL
STATION
Broadcast
DISTRIBUTION
Videotape
© norpak corporation 2001
14 MAR 01
DATA DELIVERY (CAPTION CREATION)
TES7 Encoder
VTR
VTR
608
Caption
Server
Videotape
CAPTION CREATION
CAPTION
CREATION
© norpak corporation 2001
NETWORK
HEADEND
CONTRIBUTION
Videotape
LOCAL
STATION
DISTRIBUTION
Broadcast
14 MAR 01
DATA DELIVERY (NETWORK)
Contribution
292M
MPEG
DECODE
& DEMUX
292M
292M
TES7
TES7
MPEG
Encoder
& MUX
Routing
292M
VTR
292M
Videotape
Compressor
ADB7
259M
Server
292M
CAPTION
CREATION
© norpak corporation 2001
NETWORK
HEADEND
CONTRIBUTION
Videotape
LOCAL
STATION
DISTRIBUTION
Broadcast
14 MAR 01
Distribution
DATA DELIVERY (STATION)
Distribution
292M
MPEG
DECODE
& DEMUX
292M
292M
TES7
TES7
Routing
MPEG
Encoder
& MUX
Broadcast
PSIP Gen
292M
VTR
292M
Videotape
Compressor
ADB7
259M
Server
292M
CAPTION
CREATION
© norpak corporation 2001
NETWORK
HEADEND
CONTRIBUTION
Videotape
LOCAL
STATION
DISTRIBUTION
Broadcast
14 MAR 01
TES7
SMPTE334
data on SMPTE292 ‘baseband, HD video
Captioning EIA608/708 and ‘native’ EIA708B
Transparent mode
Bridge mode to feed compression systems
© norpak corporation 2001
14 MAR 01
TES7 STANDARDS
TES7
272M
334M
299M
Audio
(HANC)
VANC
mapping
HDTV audio
(HANC)
ANCILLARY
DATA
291M
ANC data
VIDEO
FORMATS
(selected)
125M
SD video
BIT-SERIAL
INTERFACES
© norpak corporation 2001
305M
“packet data”
i.e. MPEG
TES7
TES7
TES7
267M
274M
296M
SD 16:9
1920x1080I
1280x720P
259M
292M
270 & 360 Mbs
1.485 Gbs
TES7
14 MAR 01
ANCILLARY DATA FORMAT
LUMINANCE
VANC
H
A
N
C
: 1920 OR 1280 BYTES
CHROMINANCE : 1920 OR 1280 BYTES
ACTIVE
PICTURE
DATA
ANC PACKET ANC PACKET ANC PACKET
7-262 BYTES
ADF
(3)
© norpak corporation 2001
DID
SDID
7-262 BYTES
DC
7-262 BYTES
DATA PAYLOAD
0-255 BYTES
CS
14 MAR 01
VANC THROUGHPUT

EACH LINE OF LUMA OR CHROMA CARRIES:
1920 X 60 = 115.2K BYTES/SEC (274M)
1280 X 60 = 76.8K BYTES/SEC (296M)

EACH LINE CARRIES:
115.2K X 2 = 230.4K BYTES/SEC (274M)
76.8K X 2 = 153.6K BYTES/SEC (296M)

VANC SPACE CONTAINS:
274M : LINES 1-20, MINUS 2 SWITCHING = 18 LINES
296M : LINES 1-25, MINUS 2 SWITCHING = 23 LINES
© norpak corporation 2001
14 MAR 01
BRIDGES
 DEDICATED
• VDB7 – analog 608 to compression system 708
• ADB7 – SMPTE 292/259/292 HD baseband
 DUAL
PURPOSE
• TES3 – with software modules can bridge between signals and
also between standards
• TES7 – bridges SMPTE334 data on SMPTE292 baseband signal
to emission compression system
© norpak corporation 2001
14 MAR 01
ADB7 HD BRIDGE



Bridges SMPTE334 data from/to SMPTE
292/259/292 baseband video signals
Used with two part HD storage devices
Bridges around the compression engine
© norpak corporation 2001
14 MAR 01
VDB7 DTV BRIDGE
 Upconverts 6O8 to 708 captions
 One video service per module
 Up to four modules (services) per
chassis. Module types may be mixed
CHASSIS
 16 chassis can be daisy chained
 Software loadable - other modules
such as Nielsen reader available
© norpak corporation 2001
MODULE
14 MAR 01
NORPAK CUSTOMERS



Algeria, Argentina, Australia, Belgium, Brazil, Canada, China,
Denmark, France, Greece, Germany, Hong Kong, Hungary, Indonesia,
Ireland, Israel, Italy, Japan, Korea, Malaysia, Mexico, Morocco,
Netherlands, New Zealand, Norway, Philippines, Portugal, Russia,
Singapore, Slovakia, South Africa, Sweden, Switzerland, Taiwan,
Thailand, Turkey, UK, US, Vietnam, Venezuela, ...
ABC, ABN, BBC, BBS, CBC, CBS, CHINATV, 5ieme, CNN, CTV, FOX,
GLOBO, HBO, ITV, KBS, LCE, MBC, NBC, RCTI, SEVEN, SKY,
SWTX, TDA, TDF, TCS, TELEVISA, TSN, TVAzteca, TVO,
UNIVISION, UPN, ZDF and more .…
Acer, DirecTV, Gemstar, Hitachi, IBM, Intel, Liberate, Matsushita,
LG, Microsoft, Mitsubishi, Motorola, Pioneer, RespondTV, Samsung,
Scientific Atlanta, Sanyo, Sony, TAK, Thomson, Toshiba, WavePhore,
WebTV, Wink, WorldGate, Zenith, and more ....
© norpak corporation 2001
14 MAR 01
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