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3/14/01 Sencore Inc, 2001 1
MPEG
DVB
ATSC
DTV
HDTV
SDTV
MPEG
Testing 608 and 708 Testing 608 and 708 Closed Caption StreamsClosed Caption Streams
By Stephane Billat
Application Engineer
Sencore Inc
3/14/01 Sencore Inc, 2001 2
MPEG
DVB
ATSC
DTV
HDTV
SDTV
MPEG
The CC Technical ChallengeThe CC Technical Challenge
Insert Closed Caption into ATSC Streams and recover them for use on ATSC compatible displays
3/14/01 Sencore Inc, 2001 3
MPEG
DVB
ATSC
DTV
HDTV
SDTV
MPEG
The CC Technical ChallengeThe CC Technical Challenge
Insert Closed Caption into ATSC Streams and recover them for use on ATSC compatible displays
Problem: ATSC CC is new, powerful, complex, has almost unlimited combinations.
3/14/01 Sencore Inc, 2001 4
MPEG
DVB
ATSC
DTV
HDTV
SDTV
MPEG
The CC Technical ChallengeThe CC Technical Challenge
Insert Closed Caption into ATSC Streams and recover them for use on ATSC compatible displays
Problem: ATSC CC is new, powerful, complex, has almost unlimited combinations.
Solution: Need for independent testing
3/14/01 Sencore Inc, 2001 5
MPEG
DVB
ATSC
DTV
HDTV
SDTV
MPEG
CC in the ATSC StreamCC in the ATSC Stream
3/14/01 Sencore Inc, 2001 6
MPEG
DVB
ATSC
DTV
HDTV
SDTV
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Analog 608 CCAnalog 608 CC
Field-1 / Channel-1 services• CC1=Primary caption service• CC2=Special non-sync caption service
3/14/01 Sencore Inc, 2001 7
MPEG
DVB
ATSC
DTV
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Analog 608 CCAnalog 608 CC
Field-1 / Channel-1 services• CC1 = Primary caption service• CC2= Special non-sync caption service• T1 = First text service 15-row text box over all
screen• T2 = Second text service (WEB TV)• T2 in field-1 is also used for the EIA-746
transmission of Web Url: www.sencore.com.
3/14/01 Sencore Inc, 2001 8
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DVB
ATSC
DTV
HDTV
SDTV
MPEG
Analog 608 CCAnalog 608 CC
3/14/01 Sencore Inc, 2001 9
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ATSC
DTV
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Analog 608 CCAnalog 608 CC
Field-2 / Channel-2 services• CC3 = Alternative language-1• CC4 = Alternative language-2
3/14/01 Sencore Inc, 2001 10
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DVB
ATSC
DTV
HDTV
SDTV
MPEG
Analog 608 CCAnalog 608 CC
Field-2 / Channel-2 services• CC3 = Alternative language-1• CC4 = Alternative language-2• T3 = Third text service unused at present• T4 = Fourth text service unused at present• XDS
3/14/01 Sencore Inc, 2001 11
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DVB
ATSC
DTV
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Analog 608 CC featuresAnalog 608 CC features
• Roll UpRoll Up• Pop onPop on• Background colorBackground color• Few special effect Few special effect • Limited in bandwidthLimited in bandwidth
3/14/01 Sencore Inc, 2001 12
MPEG
DVB
ATSC
DTV
HDTV
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MPEG
Analog 608 CCAnalog 608 CC
3/14/01 Sencore Inc, 2001 13
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DVB
ATSC
DTV
HDTV
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MPEG
Digital 708 CC FeaturesDigital 708 CC Features
• Multiple windows (7)• Many effects
Drop shadowTranslucentDifferent types of borders. Pen typesFonts Languages
3/14/01 Sencore Inc, 2001 14
MPEG
DVB
ATSC
DTV
HDTV
SDTV
MPEG
Digital 708 CCDigital 708 CC
3/14/01 Sencore Inc, 2001 15
MPEG
DVB
ATSC
DTV
HDTV
SDTV
MPEG
Digital 708 CCDigital 708 CC
3/14/01 Sencore Inc, 2001 16
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DVB
ATSC
DTV
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MPEG
708 Window Definition View708 Window Definition View
3/14/01 Sencore Inc, 2001 17
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DVB
ATSC
DTV
HDTV
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MPEG
708 Window Style View708 Window Style View
3/14/01 Sencore Inc, 2001 18
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ATSC
DTV
HDTV
SDTV
MPEG
708 Pen Style View708 Pen Style View
3/14/01 Sencore Inc, 2001 19
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DVB
ATSC
DTV
HDTV
SDTV
MPEG
CC logs creationCC logs creation
3/14/01 Sencore Inc, 2001 20
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Other FeaturesOther Features
• Select display mode in presentation or decode order.• Useful in establishing delay in the insertion & its relation to the picture.
3/14/01 Sencore Inc, 2001 21
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DVB
ATSC
DTV
HDTV
SDTV
MPEG
ConclusionConclusion
• CC708 includes 608 and new CC
3/14/01 Sencore Inc, 2001 22
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DVB
ATSC
DTV
HDTV
SDTV
MPEG
ConclusionConclusion
• CC708 includes 608 and new CC
• Challenge: Insertion into ATSC Stream
3/14/01 Sencore Inc, 2001 23
MPEG
DVB
ATSC
DTV
HDTV
SDTV
MPEG
ConclusionConclusion
• CC708 includes 608 and new CC
• Challenge: Insertion into ATSC Stream
• Need for CC independent testing
3/14/01 Sencore Inc, 2001 24
MPEG
DVB
ATSC
DTV
HDTV
SDTV
MPEG
For More InformationFor More Information
Side of the room demo of
Analysis CC stream
Or
Contact Stephane Billat
1-800-SENCORE x279
