DTV CAPTION SUMMIT 14 MARCH 01 SESSION ON NEXT STEPS norpak corporation

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DTV CAPTION SUMMIT14 MARCH 01SESSION ON NEXT
STEPSnorpak corporation

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CAPTION DELIVERY ARCHITECTURE
LOCAL STATION MAY ADD LOCAL CAPTION DATA
CAPTIONS ADDED TO ORIGINAL PROGRAM
NETWORK MAY ADD CAPTIONING DATA
CAPTION CREATION
NETWORK HEADEND
LOCAL STATION
Broadcast
CONTRIBUTION
DISTRIBUTION
Videotape
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TES7 CAPTIONING FORMATS
Encoding
Bridging to MPEG
Decoding descriptors
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DATA DELIVERY (CAPTION CREATION)
CAPTION CREATION
CAPTION CREATION
NETWORK HEADEND
LOCAL STATION
Broadcast
CONTRIBUTION
DISTRIBUTION
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DATA DELIVERY (NETWORK)
292M
Contri- bution
292M
292M
Distri- bution
MPEG DECODE DEMUX
292M
292M
292M
CAPTION CREATION
NETWORK HEADEND
LOCAL STATION
Broadcast
CONTRIBUTION
DISTRIBUTION
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DATA DELIVERY (STATION)
292M
Distri- bution
292M
292M
MPEG DECODE DEMUX
Broadcast
292M
292M
292M
CAPTION CREATION
NETWORK HEADEND
LOCAL STATION
Broadcast
CONTRIBUTION
DISTRIBUTION
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TES7

• SMPTE334 data on SMPTE292 baseband, HD video
• Captioning EIA608/708 and native EIA708B
• Transparent mode
• Bridge mode to feed compression systems

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TES7 STANDARDS
TES7
272M Audio (HANC)
299M HDTV audio (HANC)
334M VANC mapping
ANCILLARY DATA
291M ANC data
TES7
TES7
TES7
125M SD video
267M SD 169
274M 1920x1080I
296M 1280x720P
305M packet data i.e. MPEG
VIDEO FORMATS (selected)
BIT-SERIAL INTERFACES
259M 270 360 Mbs
TES7
292M 1.485 Gbs
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ANCILLARY DATA FORMAT
LUMINANCE 1920 OR 1280 BYTES
ACTIVE PICTURE DATA
VANC
CHROMINANCE 1920 OR 1280 BYTES
HANC
ANC PACKET 7-262 BYTES
ANC PACKET 7-262 BYTES
ANC PACKET 7-262 BYTES
ADF (3)
DID
SDID
DC
DATA PAYLOAD 0-255 BYTES
CS
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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

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BRIDGES

• DEDICATED
• VDB7 analogue 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

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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

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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
• 16 chassis can be daisy chained
• Software loadable - other modules such as
  Nielsen reader available

CHASSIS
MODULE
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CONCLUSIONS

• The TES7 provides embedded 608, derived 708, and
  native 708 encoding in the vertical ancillary
  space of the HD baseband signal. Therefore DTV
  encoding requirements are met.
• The ADB7 provides the capability to store VANC
  caption data on tape drives and video servers
  available from several manufacturers. Caption
  content can continue to be delivered in the way
  it now is.
• The TES7 will pull caption data from the
  SMPTE292M VANC and provide it to the ATSC program
  encoder (DTVCC) and PSIP server, bridging between
  baseband and emission standards, until such time
  as emission equipment reads SMPTE334 data.
• CONCLUSION the entire end-to-end system is in
  place. It would be advantageous to standardize on
  caption file formats and interfaces. It is
  suggested that this should be the next step.