Technology Committee Meeting | 22-23 Jan 2008 | Disney Studios - Burbank, CA IFE Captioning WAEA...

Technology Committee Meeting | 22-23 Jan 2008 | Disney Studios - Burbank, CA

IFE Captioning

WAEA Working Group

Bryan Rusenko, Crest Digital

Technology Committee Meeting | 22-23 Jan 2008 | Disney Studios - Burbank, CA 2

Captioning and Subtitling•Current Work by Panasonic Avionics Corp.

–Presentation of Workflow•Description of Common Formats

– Text Only List– SAMI– QuickTime– ST2– DFXP

•Working With Subtitle Formats


Objective of A Format• Convey Subtitle / Caption Information

– What is the subtitle?• Font and style• Message

– Where should it be placed?– When to display? (time on)– When to clear display? (time off)

Simple Text Only ListLine 1: 1Line 2: 01;00;10;23Line 3: 01;00;13;05Line 4: Translation of text first line.Line 5: Translation second line, if needed.

Line 6: <CR> only (blank line)Line 7: 2Line 8: 01;00;20;06

etc…

SAMI Example (headers)<SAMI> <HEAD> <STYLE TYPE="text/css">  </STYLE> </HEAD>

SAMI Example (titles) <BODY> <SYNC Start="200"> If there were nothing in our universe </SYNC> <SYNC Start="2200"> the fabric of space-time would be flat. </SYNC> <SYNC Start="5650"> But add a mass, and dimples form within it. </SYNC> <SYNC Start="8883"> </SYNC> </BODY></SAMI>


QuickTime timed text{QTtext}{timescale:100}{font:Arial}{size:12}{backColor:0,0,0}{textColor:65535,65535,65535}{width:180}{justify:left}

[00:00:00.20]{justify:center}If there were nothingin our universe

[00:00:02.20]the fabric of space-timewould be flat.

[00:00:05.65]But add a mass,and dimples form within it.

[00:00:16.61]Smaller objects thatapproach that large mass

[00:00:19.84]will follow the curvein space-time around it.

[00:00:32.64]Our nearest star, the sun,has formed such a dimple


Scenarist Subtitle Format• Known as ST2 Format• Set of Files

– Control or timing file, .sst .son– Image Files

• TIF, BMP• Constrained image size• Constrained color palette, 2 bit (four colors)

– Optionally Packaged as .zip


ST2 Format (headers)st_format 2################################################# Title : GamePlanAra## English Subtitle File## Edited by : Crest Digital# Date : 11/21/07################################################## BG = Background colour# PA = Text foreground colour (letter body)# E1 = Antialiasing colour# E2 = Text border colour################################################Subtitle GamePlanAraPixel_Area (2 479)Display_Area (0 2 719 479)Color (1 2 3 4)Contrast (15 15 15 0)BG (0 0 255 = = = )PA (255 255 255 = = = )E1 (0 0 0 = = = )E2 (0 0 0 = = = )Base_Time 00:59:58:00


ST2 Format (titles)Base_Time 00:59:58:00directory file://localhost/################################################SP_NUMBER START END FILE_NAME1 01:00:59;10 01:01:03;12 GamePlanAra.0001.tif2 01:01:14;00 01:01:16;00 GamePlanAra.0002.tif3 01:01:16;29 01:01:18;29 GamePlanAra.0003.tif4 01:01:28;29 01:01:31;14 GamePlanAra.0004.tif5 01:01:50;20 01:01:53;09 GamePlanAra.0005.tif6 01:02:17;00 01:02:19;07 GamePlanAra.0006.tif7 01:02:20;07 01:02:21;05 GamePlanAra.0007.tif8 01:02:26;07 01:02:27;17 GamePlanAra.0008.tif9 01:02:34;27 01:02:35;27 GamePlanAra.0009.tif10 01:03:26;14 01:03:31;04 GamePlanAra.0010.tif11 01:03:41;06 01:03:42;18 GamePlanAra.0011.tif12 01:03:48;28 01:03:51;04 GamePlanAra.0012.tif13 01:03:51;09 01:03:53;19 GamePlanAra.0013.tif14 01:03:53;24 01:03:57;00 GamePlanAra.0014.tif15 01:03:57;06 01:03:59;06 GamePlanAra.0015.tif16 01:03:59;11 01:04:00;15 GamePlanAra.0016.tif17 01:04:00;20 01:04:01;18 GamePlanAra.0017.tif18 01:04:01;23 01:04:02;29 GamePlanAra.0018.tif …continues…1544 02:48:00;26 02:48:03;07 GamePlanAra.1544.tif1545 02:48:25;25 02:48:27;21 GamePlanAra.1545.tif


Subtitle Image File


Criteria For Subtitle Data• Timing

– Start of program (first frame)– Frame rate

• Placement– Presentation version– Safe Area of display

• Readability– Display dependant


Timing Concerns• Version Match

– What Version Is The Video Essence?– From What Version Was Subtitling Created?

• Airline version (edited or theatrical)• Home Video (DVD) release version

• Compatibility Issues• Presentation differences - logos, formatting disclaimer• TV Standard (frame rate) - 25 fps, 29.97 fps• Time code type of master tape - DF, NDF

• Coherency Of Timecodes• Ascending values, non overlapping


Placement• Intended Version

– 16x9, 4x3– Are titles in active picture area?

• Must Not Obscure Program Content– Any graphic item in video– Main titles, narrative titles

• What Is The Safe Area of Display Device?– Overscan?– Broadcast Safe Action (10% from edge)– Broadcast Safe Title (20% from edge)


Readability• Size appropriate For Display• Appropriate For Characters In Subtitle

– Render size (textual)– Scaling of subtitle image (graphic)

• Percentage of Picture Height

DFXP Example<?xml version="1.0" encoding="UTF-8"?><tt xmlns="http://www.w3.org/2006/04/ttaf1" xmlns:tts="http://www.w3.org/2006/04/ttaf1#styling" xml:lang="en"> <head> <styling> <style id="defaultSpeaker" tts:fontSize="12" tts:fontFamily="Arial" tts:fontWeight="normal" tts:fontStyle="normal" tts:textDecoration="none" tts:color="white" tts:backgroundColor="black" tts:textAlign="left" /> <style id="defaultCaption" tts:fontSize="12" tts:fontFamily="Arial" tts:fontWeight="normal" tts:fontStyle="normal" tts:textDecoration="none" tts:color="white" tts:backgroundColor="black" tts:textAlign="center" /> </styling> </head> <body style="defaultCaption" id="thebody"> <div xml:lang="en"> If there were nothing in our universe the fabric of space-time would be flat. But add a mass, and dimples form within it. Smaller objects that approach that large mass will follow the curve in space-time around it. Our nearest star, the sun, has formed such a dimple and our tiny planet Earth goes along for the ride in the curve of its dimple staying in orbit around the sun. </div> </body></tt>


DFXP ModelAuthoring System:

Subtitle CreatorsTranscoding System:

Integration ProcessDistribution Format:

Vendor SpecificLegacy:

ST2, SAMI, othersDFXP:

The Glue


Next Steps

• Scope• Requirements• Reference Model• Legacy (Panasonic, others)


Scope

• What Are We Trying To Standardize?


Requirements• Current Systems

– Deployed– Under Development

• Legacy Systems– Videotape– Personal Players– VOD Servers

• Discussion


Reference Model• No Common Standard in Subtitle

Creation Systems– A patchwork of formats– Developing Interchange Standards

• What are they?• Can we use them?

• What Systems Are In Use?• Discussion


Reference Model

• Multiple Input Formats• Multiple Output Formats• Common Core Format

Distribution and Interchange

Technology Committee Meeting | 22-23 Jan 2008 | Disney Studios - Burbank, CA IFE Captioning WAEA...

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