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

14 MAR 01© norpak corporation 2001

DTV CAPTION DTV CAPTION SUMMITSUMMIT

14 MARCH 0114 MARCH 01SESSION ON NEXT STEPSSESSION ON NEXT STEPS

norpak corporationnorpak corporation


CAPTION DELIVERY ARCHITECTURECAPTION DELIVERY ARCHITECTURE

CAPTIONCREATION

CAPTIONS ADDED TOORIGINAL PROGRAM

CONTRIBUTION

NETWORKHEADEND

NETWORK MAY ADDCAPTIONING DATA

LOCALSTATION

LOCAL STATIONMAY ADD LOCAL CAPTION DATA

DISTRIBUTION

Broadcast

Videotape


TES7 CAPTIONING FORMATSTES7 CAPTIONING FORMATSI nput Output Purpose"Control-A" CDP in 334M

VANCCompatibility with 608caption servers

EI A-708 CDP CDP in 334MVANC

Future 708-B captionserver

Encoding

I nput Output PurposeCDP in 334MVANC

GA or 333M Compatibility withexisting MPEG encoders

CDP in 334MVANC

CDP Future 708-B compatibleMPEG encoders

Bridgingto MPEG

I nput Output PurposeCDP in 334MVANC

Descriptors(Norpak queryformat)

Provide descriptors toPSI P system

Decodingdescriptors


DATA DELIVERY (CAPTION CREATION)DATA DELIVERY (CAPTION CREATION)

CAPTIONCREATION

CONTRIBUTION

NETWORKHEADEND

LOCALSTATION

DISTRIBUTION

Broadcast

Videotape

TES7 EncoderVTR

608CaptionServer

VTR

CAPTION CREATION

Videotape


DATA DELIVERY (NETWORK)DATA DELIVERY (NETWORK)

CAPTIONCREATION

CONTRIBUTION

NETWORKHEADEND

LOCALSTATION

DISTRIBUTION

Broadcast

Videotape

TES7MPEGDECODE

& DEMUXRouting

Videotape

VTR

259MServer

Compressor

ADB7

292M

292M

292M

292MTES7 MPEG

Encoder& MUX

292M292MContri-bution Distri-

bution


DATA DELIVERY (STATION)DATA DELIVERY (STATION)

CAPTIONCREATION

CONTRIBUTION

NETWORKHEADEND

LOCALSTATION

DISTRIBUTION

Broadcast

Videotape

TES7MPEGDECODE

& DEMUXRouting

Videotape

VTR

259MServer

Compressor

ADB7

292M

292M

292M

292M

PSIP Gen

TES7 MPEGEncoder& MUX

292M292MDistri-bution Broadcast


TES7TES7

SMPTE334 data on SMPTE292 ‘baseband, HD video

Captioning EIA608/708 and ‘native’ EIA708B Transparent mode Bridge mode to feed compression systems


125MSD video

267MSD 16:9

274M1920x1080I

296M1280x720P

305M “packet data”

i.e. MPEG

292M

1.485 Gbs

259M

270 & 360 Mbs

291MANC data

272MAudio

(HANC)

299MHDTV audio

(HANC)

334MVANC

mapping

ANCILLARYANCILLARY DATADATA

VIDEOVIDEOFORMATSFORMATS(selected)(selected)

BIT-SERIALBIT-SERIALINTERFACESINTERFACES

TES7

TES7

TES7 TES7

TES7

TES7 STANDARDSTES7 STANDARDS


ACTIVEPICTURE

DATA

HANC

ANCILLARY DATA FORMATANCILLARY DATA FORMAT

VANC

LUMINANCE : 1920 OR 1280 BYTES

CHROMINANCE : 1920 OR 1280 BYTES

ANC PACKET7-262 BYTES



ADF(3) DID SDID DC DATA PAYLOAD

0-255 BYTESCS


VANC THROUGHPUTVANC 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


BRIDGESBRIDGES 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


ADB7 HD BRIDGEADB7 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


VDB7 DTV BRIDGEVDB7 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


CONCLUSIONSCONCLUSIONS 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’.

Documents

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