Hidden Uses for Teletext + how Subtitles work, the first EPG and PDC for controlling VCRs!

Описание: Behind the Scenes of Teletext: Subtitles, Data Broadcasting, and More
Former BBC engineer Peter Wietzel joins Russell Trafford-Jones in this episode of Broadcast Focus as they delve into the intricacies of Teletext covering how subtitles work, why the BBC tansmission actually used two simultaneous subtitle transitions, and the many uses of carrying arbitrary data over Teletex which were were the hidden heros! Peter finishes by talking about how the implementation was one of the first cross industry examples of collaboration in creating standards and talks about MHEG which replaced Teletext. Whether you're a technical enthusiast or just curious about broadcasting history, this should be good!
00:00 Welcome & Intro
02:30 Understanding Subtitles in Teletext
04:11 Technical Details of Subtitles Transmission
10:42 Subtitle Demo
11:10 Inserting Live and Recorded Subtitles
15:57 Dealing with Lack of Subtitles & Policing
18:35 Using 'Subtitles' to Help Deal with AFD/VI/Aspect Ratio
19:34 A Second Simultaneous Subtitle System for Internal Use
21:27 Inserting Subtitles in the BBC Regions
22:50 Teletext in SDI - SDI Bridge
25:25 Second Generation SDI Bridge
27:40 Quick look at Presfax
29:06 Databroadcasting – Sending Generic Data
31:40 Uses of Databroadcaster
34:00 Dairy Farming
36:00 Carrying audio over Teletext
40:40 Presfax Details
44:36 Controling Overlay Insertion at Transmitters
46:11 Ceefax In Vision
49:25 Teletext Standards
50:58 Collaboration and Standardisation in the 90s
54:58 Technical Enhancements and Memory Management
01:02:56 The Rise of Electronic Programme Guides
01:08:19 PDC - Recording Programmes
01:20:09 The Transition to Digital Broadcasting
01:23:00 The End of Teletext and Its Legacy
01:28:00 Reflections and Closing Remarks

With thanks to https://www.nathanmediaservices.co.uk... for the demos and by extension ‪@ZXGuesser‬