14 MAR 01 © norpak corporation 2001 DTV CAPTION SUMMIT 14 MARCH 01 SESSION ON NEXT STEPS norpak corporation

14 MAR 01 © norpak corporation 2001 CAPTION DELIVERY ARCHITECTURE CAPTION CREATION CAPTION CREATION CAPTIONS ADDED TO ORIGINAL PROGRAM CONTRIBUTION NETWORK HEADEND NETWORK HEADEND NETWORK MAY ADD CAPTIONING DATA LOCAL STATION LOCAL STATION LOCAL STATION MAY ADD LOCAL CAPTION DATA DISTRIBUTION Broadcast Videotape

14 MAR 01 © norpak corporation 2001 TES7 CAPTIONING FORMATS Encoding Bridging to MPEG Decoding descriptors

14 MAR 01 © norpak corporation 2001 DATA DELIVERY (CAPTION CREATION) CAPTION CREATION CAPTION CREATION CONTRIBUTION NETWORK HEADEND NETWORK HEADEND LOCAL STATION LOCAL STATION DISTRIBUTION Broadcast Videotape TES7 Encoder VTR 608 Caption Server VTR CAPTION CREATION Videotape

14 MAR 01 © norpak corporation 2001 DATA DELIVERY (NETWORK) CAPTION CREATION CAPTION CREATION CONTRIBUTION NETWORK HEADEND NETWORK HEADEND LOCAL STATION LOCAL STATION DISTRIBUTION Broadcast Videotape TES7 MPEG DECODE & DEMUX Routing Videotape VTR 259M Server Compressor ADB7 292M TES7 MPEG Encoder & MUX 292M Contri- bution Distri- bution

14 MAR 01 © norpak corporation 2001 DATA DELIVERY (STATION) CAPTION CREATION CAPTION CREATION CONTRIBUTION NETWORK HEADEND NETWORK HEADEND LOCAL STATION LOCAL STATION DISTRIBUTION Broadcast Videotape TES7 MPEG DECODE & DEMUX Routing Videotape VTR 259M Server Compressor ADB7 292M PSIP Gen TES7 MPEG Encoder & MUX 292M Distri- bution Broadcast

14 MAR 01 © norpak corporation 2001 TES7 + SMPTE334 data on SMPTE292 ‘baseband, HD video + Captioning EIA608/708 and ‘native’ EIA708B + Transparent mode + Bridge mode to feed compression systems

14 MAR 01 © norpak corporation M SD video 267M SD 16:9 274M 1920x1080I 296M 1280x720P 305M “packet data” i.e. MPEG 292M Gbs 259M 270 & 360 Mbs 291M ANC data 272M Audio (HANC) 299M HDTV audio (HANC) 334M VANC mapping ANCILLARY DATA VIDEOFORMATS(selected) BIT-SERIALINTERFACES TES7 TES7 STANDARDS

14 MAR 01 © norpak corporation 2001 ACTIVE PICTURE DATA HANCHANC ANCILLARY DATA FORMAT VANC LUMINANCE : 1920 OR 1280 BYTES CHROMINANCE : 1920 OR 1280 BYTES ANC PACKET BYTES ANC PACKET BYTES ANC PACKET BYTES ADF (3) DIDSDIDDC DATA PAYLOAD BYTES CS

14 MAR 01 © norpak corporation 2001 VANC THROUGHPUT n EACH LINE OF LUMA OR CHROMA CARRIES : o1920 X 60 = 115.2K BYTES/SEC (274M) o1280 X 60 = 76.8K BYTES/SEC (296M) n EACH LINE CARRIES : o115.2K X 2 = 230.4K BYTES/SEC (274M) o76.8K X 2 = 153.6K BYTES/SEC (296M) n VANC SPACE CONTAINS : o274M : LINES 1-20, MINUS 2 SWITCHING = 18 LINES o296M : LINES 1-25, MINUS 2 SWITCHING = 23 LINES

14 MAR 01 © norpak corporation 2001 BRIDGES 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

14 MAR 01 © norpak corporation 2001 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

14 MAR 01 © norpak corporation 2001 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

14 MAR 01 © norpak corporation 2001 CONCLUSIONS n 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. n 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. n 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. n 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’.