 
 <prompt> text: ```Answer di questions wey dey di end based on di text.

Di term high definition once describe series of television systems wey start from August 1936; but, dis systems na high definition only wen you compare am to earlier systems wey dey based on mechanical systems wey get as few as 30 lines of resolution. Di competition wey dey happen between companies and nations to create true "HDTV" span di whole 20th century, as each new system dey more HD pass di last. For di beginning of di 21st century, dis race still dey go on with 4k, 5k and current 8K systems.

Di British high-definition TV service start trials for August 1936 and regular service on 2 November 1936 using both di (mechanical) Baird 240 line sequential scan (later to be inaccurately rechristened 'progressive') and di (electronic) Marconi-EMI 405 line interlaced systems. Di Baird system stop for February 1937. For 1938 France follow with their own 441-line system, variants of which other countries use. Di US NTSC 525-line system join for 1941. For 1949 France introduce even higher-resolution standard at 819 lines, a system wey suppose be high definition even by today's standards, but e be monochrome only and di technical limitations of di time no allow am achieve di definition wey e suppose get. All of these systems use interlacing and a 4:3 aspect ratio except di 240-line system wey be progressive (actually described at the time by the technically correct term "sequential") and di 405-line system wey start as 5:4 and later change to 4:3. Di 405-line system adopt di (at that time) revolutionary idea of interlaced scanning to overcome di flicker problem of di 240-line with its 25 Hz frame rate. Di 240-line system fit double its frame rate but dis go mean say di transmitted signal go double in bandwidth, an option wey no go acceptable as di video baseband bandwidth suppose no pass 3 MHz.

1. Wetin no fit pass di video baseband bandwidth?
2. Whose high-definition TV service first start trials?
3. When?
4. When regular service start?
5. Wetin high definition originally describe?
6. How many lines of resolution dem get?
7. Wetin drive companies and nations to create true HDTV?
8. How long dat competition last?
9. Wetin be di most current system?
10. Wetin be one of di previous systems for dis race?
11. Baird 240 scan na mechanical or electrical?
12. Wetin dem wrongly know am as?
13. Which system be electronic?
14. How many lines e get?
15. E be interlaced?
16. When di Brits kill am off?
17. Wetin be di country wey get their own system di next year?
18. How many lines dem get for 1949?
19. E get any color?
20. Wetin be di aspect ratio wey dem use?

Numbered answers:``` <response>: ```1. 3 MHz
2. Di British high-definition TV service
3. August 1936
4. 2 November 1936
5. A series of television systems
6. 30
7. Competition
8. Di entire 20th century
9. 8K systems.
10. 4k
11. mechanical
12. Progressive
13. Marconi-EMI 405
14. 405
15. Yes
16. 1937.
17. France
18. 819
19. No
20. 4:3``` 