this is bbc world news. the headlines: the british prime minister, theresa may, says a day of intensive talks with cabinet ministers has produced an agreement on future relations with the european union after brexit. the deal proposes continued free trade in goods. but it says the current free movement of people will end. the us and north korea have agreed to set up a joint working group on denuclearization after a meeting in pyongyang between seretary of state mike pompeo and the north korean leader's right hand man, kim yong chol. mr pompeo is due to meet kim jong un on saturday. rescue teams in thailand say an air supply line has been installed in the cave where 12 boys and their football coach have been trapped for two weeks. there had been concern about falling oxygen levels as rescuers try to work out how to bring the boys to safety. coming up in 10 minutes‘ time, news watch, but first on bbc news, click. the thing i love about mit in boston

is that whenever you open a door in a basement you could run into anything. unless it runs into you first. which might be why, for the seventh straight year, mit has been named the world's number one university. and, i am going to say it, this is one of my favourite places in the world. what i love about mit is that it is all over the place. the buildings have this brilliant higgledy—piggledy nature and inside is the same. here at csail, for example, there is stuff all over the place.

it is wonderful. the computer science and artificial intelligence lab, csail, is mit's ai powerhouse with some of the world's foremost researchers in the field. here, ai has taught itself to see through walls while robots are being built to swim through our bodies. why? well i'll tell you later. but it is obvious that we are still only starting to explore how to use artificial intelligence and robotics. 20 years ago computation was a task reserved for experts because computers were large and expensive and you really needed to know what to do with them. but today, everyone has access to computation, and in fact computation is so prevalent. we don't even see how we depend on it. the next 20 years will be

about bringing ai and robotic tech to help us with cognitive and physical work. we recently looked at speech synthesis. this emulates voices. it raises interesting ethical issues. it can be used for good. we have been to new york to find out how new developments are helping disabled people to find their voice again. if you were on social media in the summer you were on social media in the summer of 2014 perhaps you are aware of the ice bucket challenge. it raised over $100 million for the als association in just two

raised over $100 million for the als association injust two months. for many of us, our voice is the central pa rt many of us, our voice is the central part of who we are. to lose it would be to lose a sense of our very identity. here in yonkers in new york, one man who lost his voice to motor neurone disease has been given back his sense of self through technology. project revoice is an international initiative to help give people with mnd or als their voice back. using software from canada—based company lyrebird, it can synthesise an accurate recreation of someone‘s voice from a relatively small amount of audio. lyrebird's software was famously and controversially used last year to recreate the voices of us presidents donald trump and barack 0bama. voice of donald trump: i am not a robot. my intonation is different. pat quinn was one of the early cofounders of the challenge. he was diagnosed with als in march 2013. the extent of his illness now means he cannot speak. he was one of the first to be given his voice back by project revoice. one of the things that we hear

from people with als is that they, you know, that their voice really reflects themselves and their own thinking about themselves. one of the things that we hear from people with als is that they, you know, that their voice really reflects themselves and their own thinking about themselves. but we also hear it from their family members and that is really where, you know, people say that we weren't thinking about the fact that we would not be able to hear this person speak any longer until it was gone. and now, suddenly, we missed their voice and missed that side of them. so there is something inherently unique about a person's voice that hopefully we are able to capture and keep in the future.

pat concedes that his new voice is not perfect. because he did not record this voice prior to losing it, lyrebird used online videos and speeches as their basis. lyrebird's algorithms analyse several hours of quality recordings to digitally recreate a person's speech. i don't think there are many companies before have done something that allow people to copy their voice off a small amount of audio. speech synthesis is an old research subject and it has been going on for more than 30 years. but what we provide is for people to really do it in their home and you can go to our website, record yourself for a few minutes,

and after that you will get a voice. the hope is to extend the scope of project revoice more people internationally, to allow more people with mnd and als to recapture and recreate their own voice. last week you will remember this robot, which followed me around collecting my tennis balls as i prepared for wimbledon. sadly, i didn't quite make the draw. but it turns outjen copestake did. yes, it's a beautiful day here at wimbledon. we're checking out all the technology behind the tennis tradition. artificial intelligence gets everywhere these days. even here at the all england club, where ibm's watson is busy at work behind the scenes. we are going to see three ways ai is being utilised at the tennis for content creators, players and fans.

first, content creation. where are we right now? we are below broadcast centre. these are what we affectionately refer to as the bunkers. any chance of running into roger federer down here? possibly in the media room around the corner. watson's incredible processing data power is being used to create highlight reels with no human involvement. listening to the noise of the crowd and listening for those really exciting moments. taking in the audio feed from the side of the court, and you know those rounds you get where you get the real "oohs" and "aahs. " so if the crowd's excited, it might put that down as an exciting point. it's looking at the data to decide, where are the pressure points in the match? it also looks at how the players react. how animated they are

with their arms, how obviously emotive they are when they do that. it combines those together to create an excitement level and that gets fed into this dashboard and all of the points are ranked, and at the end of the match, watson will also generate a highlights package based on those exciting points, and they give that to the content team so we can get it out quickly. players can also take advantage of this quick turnaround of highlights. instead of going through hours of video, each team is given a unique website to check. here are roger federer‘s unforced errors. this helps coaches create a narrative of what happened in the game and quickly see where they can improve against their opponents. players, we sort of sometimes forget they are really the biggest fans of their own sport, and they want to know how their friends are getting on, their rivals are getting on, but also those statistics and data that help them in their own analysis of how they are playing, that is really valuable as well. and for fans who want deep analysis, they can get it by accessing all of the statistics via wimbledon‘s new

facebook messenger bot. that's also driven by watson. watson has one final data trick to show off. it's the first nonhuman to design a wimbledon poster, celebrating 150 years of the all england club. it uses visual recognition to scan over 300,000 historic photographs. the final result is this mosaic made up of 8400 individual images. instead of the usual colour matching, watson was taught to recognise the different elements of a photograph, such as umbrellas, and find umbrella photos to match. even the texture of the court is made up of other photographs of courts. well played. that was jen at wimbledon. back in boston, my robot tour has left me hungry for more. the spyce restaurant is where i'm going to feed my need. touchscreens take the orders, robots cook the meals, and the humans are relegated to the source stations.

chicken rice... an orange delivery box zips up and down a track transporting ingredients and dropping them into seven specially designed spinning pots. they toss the food, keeping a constant temperature via an induction plate. the only thing letting down this computerised cohort of wok wielders is arguably the people in charge of delivery. they haven't called my name out yet. it was there all along. look at that. was i supposed to get a drink with my order? 0k. thank you. the concept is the brainchild of the spice boys, four mit graduates who spotted a gap in this in this field to fill in this tech hungry town.

early on, the first prototype, the first idea of design was about three and a half years ago. now, this is obviously only suited to stir fries, and maybe other dishes where everything is cooked together and presentation is not an issue. if you want a steak, potatoes and a drizzle of red wine jus, you'll need a completely different robot. thanks for watching. i ,and , and welcome to newswatch with me, samira ahmed. coming up on the programme... football's coming home, we're told, but has it been rammed down the throats of those who have no interest in it? and how do those from other parts of the uk feel about the attention being given to the england team in particular? another day of tension and drama on friday over the government's plans for leaving the european union began

with an innovative attempt by political correspondant alex forsyth to describe the scenario facing the prime minister as she prepared for the summit with her ministers at chequers. so what we've got here is theresa may, who is our king. she may come out on top, or she could be toppled, but right now, what she's doing is moving forward, one step at a time, as kings tend to do, trying to get her brexit plans through to the other side. now, broadly supportive of what the prime minister's come up with so far, we've got some people like, for example, the chancellor, philip hammond, down here. michael davies was unimpressed by that giant chessboard, querying why... lisette baker agreed: tuesday's 0utside source coincided with what, for many,

was the highlight of the week, that rare occasion when the england football team won a penalty shoot out in the knockout stage of the world cup.