Broadcast Television Archiving
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Transcript of Broadcast Television Archiving
![Page 2: Broadcast Television Archiving](https://reader036.fdocuments.us/reader036/viewer/2022062517/56813767550346895d9efb6f/html5/thumbnails/2.jpg)
Current System
• Analog input-based• Encodes to MPEG-2 Program Stream files• Initially DLT tape based• Now uses removable 3.5 inch drives• Operational since 2000
![Page 3: Broadcast Television Archiving](https://reader036.fdocuments.us/reader036/viewer/2022062517/56813767550346895d9efb6f/html5/thumbnails/3.jpg)
Current System
• Records up to twenty channels on five PCs• Content from around the world• More than half of these channels have EPG• US and Canadian channels have captions• Operates at a house in suburban MD
![Page 4: Broadcast Television Archiving](https://reader036.fdocuments.us/reader036/viewer/2022062517/56813767550346895d9efb6f/html5/thumbnails/4.jpg)
Current System Issues
• Analog based• Recodes video that comes in digital• Caption data is lost in recordings (kept as text)• Expensive to expand• A big chunk stops working in February 2009!
![Page 5: Broadcast Television Archiving](https://reader036.fdocuments.us/reader036/viewer/2022062517/56813767550346895d9efb6f/html5/thumbnails/5.jpg)
Digital Future
• The future of broadcasting is digital
• One big lesson learned:• Needs to be geographically redundant• …and therefore inexpensively implemented• …and inexpensive to run long term
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MPEG-2 Transport Stream
• The worldwide standard for broadcast DTV• A single analog channel is replaced with a
digital multiplex• The multiplex can contain one or more
programs• Encoded with different codecs• With multiple audio and data streams
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Digital Archiving
• Splits programs from MPEG-2 transport streams
• One tuner required per multiplex• Multiplex may contain a number of useful
programs or just one• Transparent across the world’s DTV standards• Works with terrestrial, satellite and cable
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Digital Archiving
• Splits files based on EPG or a timer• EPG from in or outside the multiplex• Extracts captions in North America• Extracts subtitles in some European countries• Generates thumbnail pictures of video• Automatically moves data onto empty drives• XML index to each event recorded
![Page 9: Broadcast Television Archiving](https://reader036.fdocuments.us/reader036/viewer/2022062517/56813767550346895d9efb6f/html5/thumbnails/9.jpg)
Hardware is cheap!
• For two channel terrestrial:– PC - $400– Monitor - $150– Two off-air DVB-T or ATSC cards - $200– UPS - $200– Antenna - $50
• Around $1000 per system
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Storage is cheap!
• 1 TB SATA drives are now typically $179
• With MPEG-2 SD, that’s 23 days• …or 46 days with H.264 SD• …and 6 days MPEG-2 HD
• About $8 per channel per MPEG-2 SD day• Two MPEG-2 SD per year for less than $7000
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Digital Archiving Examples
• Multiplexes from around the world
![Page 12: Broadcast Television Archiving](https://reader036.fdocuments.us/reader036/viewer/2022062517/56813767550346895d9efb6f/html5/thumbnails/12.jpg)
European Satellite
![Page 13: Broadcast Television Archiving](https://reader036.fdocuments.us/reader036/viewer/2022062517/56813767550346895d9efb6f/html5/thumbnails/13.jpg)
UK Terrestrial
![Page 14: Broadcast Television Archiving](https://reader036.fdocuments.us/reader036/viewer/2022062517/56813767550346895d9efb6f/html5/thumbnails/14.jpg)
France Terrestrial
![Page 15: Broadcast Television Archiving](https://reader036.fdocuments.us/reader036/viewer/2022062517/56813767550346895d9efb6f/html5/thumbnails/15.jpg)
Finland Terrestrial
![Page 16: Broadcast Television Archiving](https://reader036.fdocuments.us/reader036/viewer/2022062517/56813767550346895d9efb6f/html5/thumbnails/16.jpg)
Germany Cable
![Page 17: Broadcast Television Archiving](https://reader036.fdocuments.us/reader036/viewer/2022062517/56813767550346895d9efb6f/html5/thumbnails/17.jpg)
Mali Cable
![Page 18: Broadcast Television Archiving](https://reader036.fdocuments.us/reader036/viewer/2022062517/56813767550346895d9efb6f/html5/thumbnails/18.jpg)
Dallas,TX Terrestrial
![Page 19: Broadcast Television Archiving](https://reader036.fdocuments.us/reader036/viewer/2022062517/56813767550346895d9efb6f/html5/thumbnails/19.jpg)
Columbus, NC Cable
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Brazil Terrestrial