DTV Captioning Transitioning from 608 to 708 Gerry Field, Manager DTV Access Project CPB/WGBH...

DTV CaptioningDTV Captioning

Transitioning from 608 to 708Transitioning from 608 to 708

Gerry Field, ManagerGerry Field, Manager

DTV Access ProjectDTV Access Project

CPB/WGBH National Center for Accessible MediaCPB/WGBH National Center for Accessible Media

DTV CAPTION SUMMITDTV CAPTION SUMMITMarch 14, 2001, Washington, DCMarch 14, 2001, Washington, DC

DTV Stations On AirDTV Stations On Air

184 in 62 markets184 in 62 markets

as of March 8, 2001as of March 8, 2001

http://www.nab.org/newsroom/pressrel/dtvstations.asphttp://www.nab.org/newsroom/pressrel/dtvstations.asp

121 in March 2000121 in March 2000


Gerry Field, WGBH-NCAMGerry Field, WGBH-NCAM

DTV Stations On AirDTV Stations On Air

Simulcast, Upconversion of NTSC Simulcast, Upconversion of NTSC signalssignals

Preservation of current servicesPreservation of current services

Migration to native DTV Migration to native DTV programming and caption servicesprogramming and caption services



DTV CAPTION SUMMITDTV CAPTION SUMMITMarch 14, 2001March 14, 2001Washington, DCWashington, DC

ProductionProduction

ContributionContribution

DistributionDistribution

EmissionEmission

ReceptionReception

DecodeDecode

DisplayDisplay

EIA-608BEIA-608B

Vertical Blanking IntervalVertical Blanking Interval

Line 21Line 21

960 bps960 bps

Field 1 = CC1, CC2, (T1, T2)Field 1 = CC1, CC2, (T1, T2)

Field 2 = CC3, CC4, (T3, T4, XDS)Field 2 = CC3, CC4, (T3, T4, XDS)



EIA-608BEIA-608B

Vertical Blanking IntervalVertical Blanking Interval

Line 21Line 21

Field 1 Field 2Field 1 Field 2

CC1=English CC3=SpanishCC1=English CC3=Spanish

T2=iTV URLs XDS=Time, V-ChipT2=iTV URLs XDS=Time, V-Chip



EIA-708BEIA-708B

MPEG-2MPEG-2

Picture User DataPicture User Data

DTVCC Transport Channel = 9600 bpsDTVCC Transport Channel = 9600 bps

carriescarries

608 and 708 caption data608 and 708 caption data




Caption Data in an ATSC Transport StreamCaption Data in an ATSC Transport Stream


VideoVideoEncoderEncoder

PSIPPSIPGeneratorGenerator

PMTPMTGeneratorGenerator

MMUUXX

DTVCC DataDTVCC Data

CaptionCaptionServiceServiceInformationInformation

TransportTransportStreamStream

EIA-708B - Figure 21 - EIA-708B - Figure 21 - Interface of Caption Data to ATSC Emission Encoding EquipmentInterface of Caption Data to ATSC Emission Encoding Equipment

DTV Closed Captioning Standards DTV Closed Captioning Standards

and Related Documentsand Related Documents

FCC RulesFCC Rules www.fcc.govwww.fcc.gov

• • 47 CFR Part 15.119 47 CFR Part 15.119 Decoder Requirements, Analog TelevisionDecoder Requirements, Analog Television

• • 47 CFR Part 15.122 47 CFR Part 15.122 Decoder Requirements, Digital TelevisionDecoder Requirements, Digital Television

• • 47 CFR Part 79 47 CFR Part 79 Programming RequirementsProgramming Requirements




ATSC StandardsATSC Standardswww.atsc.orgwww.atsc.org

• • A/53 A/53 ATSC Digital Television Standard (Sept 1995)ATSC Digital Television Standard (Sept 1995)

• • A/52 A/52 ATSCATSC Digital Television Audio Standard (Sept 1995)Digital Television Audio Standard (Sept 1995)

• • A/65 A/65 PSIP (Rev. A and Amend. No.1) (May 2000)PSIP (Rev. A and Amend. No.1) (May 2000)




CEA StandardsCEA Standardswww.ce.orgwww.ce.org

Available through Global Engineering DocumentsAvailable through Global Engineering Documents

• • EIA-608-B EIA-608-B Line 21 Data Services (October 2000)Line 21 Data Services (October 2000)

• • EIA-708-B EIA-708-B Digital Television Closed Captioning Digital Television Closed Captioning

(December 1999)(December 1999)

• • EIA-CEB8 EIA-CEB8 Consideration of EIA-608-B Data Within Consideration of EIA-608-B Data Within

the DTV (EIA-708-B) Construct (October 2000)the DTV (EIA-708-B) Construct (October 2000)




CEA StandardsCEA Standardswww.ce.orgwww.ce.org

Available through Global Engineering DocumentsAvailable through Global Engineering Documents

EIA-CEB8EIA-CEB8

Preservation of NTSC Line 21 DataPreservation of NTSC Line 21 DataUpconversion to DTV, transport, receiver, STB, analog outUpconversion to DTV, transport, receiver, STB, analog out

Use of 608 Data by DTV ReceiversUse of 608 Data by DTV ReceiversDTV devices should use 708, can use 608 if 708 not availableDTV devices should use 708, can use 608 if 708 not available

Independent Control of Audio and Caption ServicesIndependent Control of Audio and Caption Services




SMPTE StandardsSMPTE Standardswww.smpte.orgwww.smpte.org

• • SMPTE 333M-1999 Television SMPTE 333M-1999 Television DTV Closed-Caption Server to Encoder InterfaceDTV Closed-Caption Server to Encoder Interface

• • SMPTE 334M-2000 Television SMPTE 334M-2000 Television Vertical Ancillary Data Mapping for Bit-Serial InterfaceVertical Ancillary Data Mapping for Bit-Serial Interface

• • SMPTE 341M-2000 TelevisionSMPTE 341M-2000 Television Format for Non-PCM Audio and Data in an AES3Format for Non-PCM Audio and Data in an AES3

Captioning Data Type Captioning Data Type (also see SMPTE 337M to 340M)(also see SMPTE 337M to 340M)



Local Emission StationLocal Emission StationCaption EncodingCaption Encoding



Cable TelevisionCable Television

SCTE Digital Video SubcommitteeSCTE Digital Video Subcommitteeftp://ftp.cablelabs.com/pub/scte/dvs/pdfftp://ftp.cablelabs.com/pub/scte/dvs/pdf

• • SCTE DVS 053r7SCTE DVS 053r7 Standard for Carriage of NTSC VBI data in Cable Standard for Carriage of NTSC VBI data in Cable Digital Transport Streams (July 2000)Digital Transport Streams (July 2000)

• • SCTE DVS 157r1SCTE DVS 157r1 Proposed Standard Methods for Carriage of Closed Captions Proposed Standard Methods for Carriage of Closed Captions

and Non Real-Time Sampled Video (March 1999)and Non Real-Time Sampled Video (March 1999)




Cable TelevisionCable Televisionhttp://www.opencable.com/specifications.htmlhttp://www.opencable.com/specifications.html

OpenCable Set-top Terminal Functional RequirementsOpenCable Set-top Terminal Functional Requirements

for Uni-Directional Cablefor Uni-Directional Cable

OpenCable Set-top Terminal Functional RequirementsOpenCable Set-top Terminal Functional Requirements

for Bi-Directional Cablefor Bi-Directional Cable

OCI-N Cable Network Interface SpecificationOCI-N Cable Network Interface Specification



STT-BDI-C-52 and STT-UDI-C-49: All set-top terminals submitted to Cable Labs for STT-BDI-C-52 and STT-UDI-C-49: All set-top terminals submitted to Cable Labs for certification for delivery after July 1, 2002 shall process the Digital Television certification for delivery after July 1, 2002 shall process the Digital Television (DTV) Closed Captioning information, when available in the MPEG-2 Picture User (DTV) Closed Captioning information, when available in the MPEG-2 Picture User Data, as specified in EIA-708B, section 9 and delivered according to ATSC A/53 Data, as specified in EIA-708B, section 9 and delivered according to ATSC A/53 amendment 1 (with cc_type set to '10' or '11'). This caption data, when present,amendment 1 (with cc_type set to '10' or '11'). This caption data, when present,shall be passed through to a DTV display via the IEEE-1394 interface. shall be passed through to a DTV display via the IEEE-1394 interface.

If the set top terminal provides component analog or uncompressed digital output If the set top terminal provides component analog or uncompressed digital output streams, decoding and display of this caption data shall be provided by the set top streams, decoding and display of this caption data shall be provided by the set top terminal according to FCC rules part 15.122. If the set top terminal provides an terminal according to FCC rules part 15.122. If the set top terminal provides an NTSC analog video output, and the network stream dual carries EIA-608B caption NTSC analog video output, and the network stream dual carries EIA-608B caption data transported according to SCTE DVS053r7 or DVS 157r1, then the set top data transported according to SCTE DVS053r7 or DVS 157r1, then the set top terminal shall reconstruct line 21 VBI in the analog output as required by FCC terminal shall reconstruct line 21 VBI in the analog output as required by FCC rules part 15.122 (a)(2).rules part 15.122 (a)(2).


Current DevelopmentsCurrent Developments

DTV Caption Test DTV Caption Test BitstreamsBitstreams

CEA R4.3 WG1CEA R4.3 WG1DTV Station ProjectDTV Station Project

NCAM DTV Access ProjectNCAM DTV Access Project

ATSC/CEA PlugfestsATSC/CEA PlugfestsJune, September 2000June, September 2000

January 2001January 2001Spring/Summer 2001Spring/Summer 2001



Caption Encoder ProductCaption Encoder Product

Local EmissionLocal Emission

Network DistributionNetwork DistributionVANC in 292VANC in 292



Education ActivitiesEducation Activities

ATSC IS ATSC IS S3 Working GroupS3 Working Group

Distribution ModelsDistribution ModelsCDP TutorialCDP Tutorial

Caption File FormatCaption File FormatWeb Based ResourcesWeb Based Resources



Education ActivitiesEducation Activities

CEACEAR4.3 WG1R4.3 WG1

Additional Test MaterialsAdditional Test Materials708 Implementation Guide708 Implementation Guide

Cable InteroperabilityCable Interoperability


Follow Up to the Follow Up to the SummitSummit

Web ResourcesWeb Resources

Working Group Conference Working Group Conference Calls Calls

Coordination of Coordination of ATSC, CEA, SMPTE, SCTE ATSC, CEA, SMPTE, SCTE

effortsefforts

DTV Captioning Transitioning from 608 to 708 Gerry Field, Manager DTV Access Project CPB/WGBH...

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