supreme leader ayatollah khamenei says no one should here think they can turn over the islamic republic. crowds have once again filled the streets where dozens of people were reportedly killed by security forces. now on bbc news, click. this week, we are celebrating 100 years of the bbc in 23 minutes. 100 years of the bbc in 23 minutes- 100 years of the bbc in 23 minutes. ~ ., ., ~ ., minutes. we will look at the secret behind minutes. we will look at the secret behind the minutes. we will look at the i secret behind the broadcasting technologies that changed the world. b, technologies that changed the world. ., ., ., world. a radio legend talks about legendary world. a radio legend talks about legendary radio. - world. a radio legend talks about legendary radio. i. world. a radio legend talks i about legendary radio. i used to set my about legendary radio. i used to set my watch about legendary radio. i used to set my watch by about legendary radio. i used to
of what was then referred to as high definition television. before that, television was just an odd fuzzy experiment small, selected audiences. and behind the scenes there was a bit of a battle going on. see, the bbc had actually opened up two studios at alexandra palace. this, studio b was a mechanical system which was made byjohn logie baird and it produced an image like this. meanwhile, in studio a, they were trailing an electrical system by emi and what they would do as they would alternate studios and systems on different days so they could compare the results and it turned out that emi s images at 25 frames per second were double the quality of the baird system. it had other advantages too. the baird camera was enormous. that emi one was somewhat more portable. and if you are filming with the baird system you need quite a lot of make up too. well, this is how it was, playmates. black and white, you see? and a bit of blue down each side of the nose. very sexy.
performers and orchestra would have been here. and a huge camera here! singing and what viewers saw was this. this is adele dixon performing with the bbc television 0rchestra. she is singing a song called television which was written especially for the opening night of. television. it was broadcast to viewers across london and the home counties through the transmitter on alexandra palace, marking the beginning of what was then referred to as high definition television. yeah, don t laugh. before that, television was just an odd fuzzy experiment small, selected audiences. and behind the scenes there was a bit of a battle going on. see, the bbc had actually opened up two studios at alexandra palace. this, studio b was a mechanical system which was made byjohn logie baird and it produced an image like this. meanwhile, in studio a, they were trailing an electrical system by emi and what they would do
it was broadcast to viewers across london and the home counties through the transmitter on alexandra palace, marking the beginning of what was then referred to as high definition television. yeah, don t laugh. before that, television was just an odd fuzzy experiment small, selected audiences. and behind the scenes there was a bit of a battle going on. see, the bbc had actually opened up two studios at alexandra palace. this, studio b was a mechanical system which was made byjohn logie baird andit produced an image like this. meanwhile, in studio a, they were trailing an electrical system by emi and what they would do as they would alternate studios and systems on different days so they could compare the results and it turned out that emi s images at 25 frames per second were double the quality of the baird system. it had other advantages too. the baird camera was enormous.