newscasts. Plans to shut it down in 2020 were changed and a reduced service is planned into 2021. Many channels on Sky still broadcast teletext subtitles and may still have a small number of active pages. Analog teletext ended in each region after analog broadcasts finished: see Digital switchover dates in the United Kingdom. Australia: the Seven Network shut down the Austext service on 30 September 2009. They said that the technology has come to the end of its useful service life and is not commercially viable to replace. New Zealand: TVNZ Access Services announced the discontinuation of the service on April 2, 2013. A claim about equipment failures and that web sites have been used instead has been given as the reason. Italy: Some nation-wide teletext services were switched off; for example, MTV Video was active between 2000 and 2010, while "LA7 Video", the teletext service of La7, was launched in 2001 but discontinued in 2014. Singapore: MediaCorp announced that they will discontinue its eponymously titled service Teletext, with effect from 30 September 2013. Subtitling still continues to use teletext in these three countries with some providers switching to using image-based DVB subtitling for HD broadcasts. New Zealand solely uses DVB subtitling on terrestrial transmissions despite teletext still being used on internal SDI links. Technology Teletext information is broadcast in the vertical blanking interval between image frames in a broadcast television signal, in numbered "pages". For example, a list of news headlines might appear on page 110; a teletext user would type "110" into the TV's remote control to view this page. The broadcaster constantly sends out pages in a sequence. There will typically be a delay of a few seconds from requesting the page and it being broadcast and displayed, the time being entirely dependent on the number of pages being broadcast. More sophisticated receivers use a memory buffer to store some or all of the teletext pages as they are broadcast, allowing almost instant display from the buffer. This basic architecture separates teletext from other digital information systems, such as the Internet, whereby pages are 'requested' and then 'sent' to the user – a method not possible given the one-way nature of broadcast teletext. Unlike the Internet, teletext is broadcast, so it does not slow down further as the number of users increases, although the greater number of pages, the longer one is likely to wait for