Transcript Document
IFE Captioning
WAEA Working Group Bryan Rusenko, Crest Digital
Technology Committee Meeting | 22-23 Jan 2008 | Disney Studios - Burbank, CA
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 Technology Committee Meeting | 22-23 Jan 2008 | Disney Studios - Burbank, CA
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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) Technology Committee Meeting | 22-23 Jan 2008 | Disney Studios - Burbank, CA
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Line 1: Line 2: Line 3: Line 4: Line 5: Line 6: Line 7: Line 8:
Simple Text Only List
1 01;00;10;23 01;00;13;05 Translation of text first line.
Translation second line, if needed.
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SAMI Example (headers)
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SAMI Example (titles)
If there were nothing
in our universe
the fabric of space-time
would be flat.
But add a mass,
and dimples form within it.
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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 nothing in our universe [00:00:02.20] the fabric of space-time would be flat.
[00:00:05.65] But add a mass, and dimples form within it.
[00:00:16.61] Smaller objects that approach that large mass [00:00:19.84] will follow the curve in space-time around it.
[00:00:32.64] Our nearest star, the sun, has formed such a dimple Technology Committee Meeting | 22-23 Jan 2008 | Disney Studios - Burbank, CA
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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
Technology Committee Meeting | 22-23 Jan 2008 | Disney Studios - Burbank, CA
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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 GamePlanAra Pixel_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 Technology Committee Meeting | 22-23 Jan 2008 | Disney Studios - Burbank, CA
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ST2 Format
Base_Time 00:59:58:00 directory file://localhost/ ################################################ SP_NUMBER START END FILE_NAME 1 01:00:59;10 01:01:03;12 GamePlanAra.0001.tif
2 01:01:14;00 01:01:16;00 GamePlanAra.0002.tif
3 01:01:16;29 01:01:18;29 GamePlanAra.0003.tif
4 01:01:28;29 01:01:31;14 GamePlanAra.0004.tif
5 01:01:50;20 01:01:53;09 GamePlanAra.0005.tif
6 01:02:17;00 01:02:19;07 GamePlanAra.0006.tif
7 01:02:20;07 01:02:21;05 GamePlanAra.0007.tif
8 01:02:26;07 01:02:27;17 GamePlanAra.0008.tif
9 01:02:34;27 01:02:35;27 GamePlanAra.0009.tif
10 01:03:26;14 01:03:31;04 GamePlanAra.0010.tif
11 01:03:41;06 01:03:42;18 GamePlanAra.0011.tif
12 01:03:48;28 01:03:51;04 GamePlanAra.0012.tif
13 01:03:51;09 01:03:53;19 GamePlanAra.0013.tif
14 01:03:53;24 01:03:57;00 GamePlanAra.0014.tif
15 01:03:57;06 01:03:59;06 GamePlanAra.0015.tif
16 01:03:59;11 01:04:00;15 GamePlanAra.0016.tif
17 01:04:00;20 01:04:01;18 GamePlanAra.0017.tif
18 01:04:01;23 01:04:02;29 GamePlanAra.0018.tif
1544 02:48:00;26 02:48:03;07 GamePlanAra.1544.tif
1545 02:48:25;25 02:48:27;21 GamePlanAra.1545.tif
…continues…
(titles)
Technology Committee Meeting | 22-23 Jan 2008 | Disney Studios - Burbank, CA
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Subtitle Image File
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Subtitle Image File
Technology Committee Meeting | 22-23 Jan 2008 | Disney Studios - Burbank, CA
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Criteria For Subtitle Data
• Timing – Start of program (first frame) – Frame rate • Placement – Presentation version – Safe Area of display • Readability – Display dependant Technology Committee Meeting | 22-23 Jan 2008 | Disney Studios - Burbank, CA
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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 Technology Committee Meeting | 22-23 Jan 2008 | Disney Studios - Burbank, CA
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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) Technology Committee Meeting | 22-23 Jan 2008 | Disney Studios - Burbank, CA
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Readability
• Size appropriate For Display • Appropriate For Characters In Subtitle
– Render size (textual) – Scaling of subtitle image (graphic)
• Percentage of Picture Height
Technology Committee Meeting | 22-23 Jan 2008 | Disney Studios - Burbank, CA
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DFXP Example
If there were nothing the fabric of space-time But add a mass, Smaller objects that will follow the curve Our nearest star, the sun, and our tiny planet Earth goes along for the ride staying in orbit
in our universe
would be flat.
and dimples form within it.
approach that large mass
in space-time around it.
has formed such a dimple
in the curve of its dimple
around the sun.
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DFXP Model
Authoring System: Subtitle Creators Transcoding System: Integration Process Distribution Format: Vendor Specific Legacy: ST2, SAMI, others DFXP: The Glue Technology Committee Meeting | 22-23 Jan 2008 | Disney Studios - Burbank, CA
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Next Steps
• Scope • Requirements • Reference Model • Legacy (Panasonic, others)
Technology Committee Meeting | 22-23 Jan 2008 | Disney Studios - Burbank, CA
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Scope
• What Are We Trying To Standardize?
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Requirements
• Current Systems – Deployed – Under Development • Legacy Systems – Videotape – Personal Players – VOD Servers • Discussion Technology Committee Meeting | 22-23 Jan 2008 | Disney Studios - Burbank, CA
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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
Technology Committee Meeting | 22-23 Jan 2008 | Disney Studios - Burbank, CA
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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
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