Цифровое телевидение в Австралии: история перехода и развития

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Digital terrestrial television in Australia commenced on 1 January 2001 in Sydney, Melbourne, Brisbane, Adelaide and Perth using DVB T standards. The phase out of analogue PAL transmissions began on 30 June 2010 and was completed by 10 December 2013. Digital terrestrial television brought a number of enhancements over the previous analogue television, primarily higher quality picture and sound, as well as datacasting and multi view services such as video program guides, high definition, and now and next program information. There are a number of additional channels, datacasting, as well as high definition services, available to digital terrestrial television viewers in Australia. Digital only content is subject to availability and differs greatly in various television markets. Although approximately 96% of the population had access to at least one digital service, take up was initially sluggish, with only 28% of Australia's 7.8 million households having adopted free to air digital television by March 2007. However, by August 2010, 75% of Australian households had made the switch. Analogue transmissions began to be phased out in 2010, and ceased to be available nationwide by the end of 2013. From 2009, the free to air digital television platform has been promoted under the Freeview brand name.

When digital television launched on 1 January 2001, the majority of households did not know of or were unable to buy a set top box in order to receive the signal. Digital Broadcasting Australia was established in late 2000 to help make the transition to digital television as seamless for consumers as possible. It included representatives from free to air broadcasters, manufacturers, suppliers, and retailers and was intended to provide information about commencement dates, coverage, and the functionality and availability of equipment.

The Australian Broadcasting Corporation launched ABC Kids and Fly TV channel in August 2001. The two multichannels, available only through digital means, showed a range of programming targeted at children and teenage viewers. Similarly, the Special Broadcasting Service launched the SBS World News Channel in 2002, a digital only service offering a number of foreign language news programmes seen in its morning WorldWatch timeslot. Funding issues meant that in May 2003 the Australian Broadcasting Corporation closed ABC Kids and Fly TV. In the same year, Tasmanian Digital Television became the first digital only commercial station to be launched in the country, under Section 38A of the Broadcasting Services Act. The new station was a joint venture between existing commercial networks Southern Cross Broadcasting and WIN Television. Tasmanian Digital Television, affiliated to Network Ten, was initially available only in Hobart, before expanding to Launceston and, by early 2009, the remainder of the state. The introduction of this fifth channel resulted in significantly higher digital television takeup in Tasmania than other parts of the country. ABC TV Plus, the Australian Broadcasting Corporation's second attempt at a digital only channel launched on 7 March 2005 as ABC2. The service showed a range of repeated news, current affairs, children's and educational programs originally shown on ABC TV (then ABC1) as well as a number of original programs launched later on, such as Australia Wide, Short and Curly and Late Night Legends. In the other market areas where there are only 1 or 2 broadcasters, digital only stations were created that transmit programming from the unrepresented broadcasters in that area. These digital only stations are owned by joint venture, or by the sole broadcaster, depending on the area. During September 2007, the three commercial networks announced the introduction of high definition only channels later that year, becoming the first new commercial television channels to launch in metropolitan areas of Australia since 1988. The Seven Network's 7HD was the first to launch on 15 October and became available through Prime Television on 29 October. This was followed by the launch of 10 HD (then Ten HD) on 16 December. The majority of the programming on the high definition channels was simulcast from the parent channel. From 2009, commercial broadcasters were allowed to transmit an alternate standard definition channel. On 26 March 2009, Channel Ten launched 10 Bold as One HD, its SD multichannel as a 24 hour sports channel. 10 Bold (then One HD) was also broadcast on 10's only HD channel space at the time, channel 1, replacing 10 HD. Channel 1 was later given back to 10 HD in September 2020, by readjusting 10's channel numbers. Nine later launched GO! (now 9Go! ), as a general entertainment channel skewed towards younger viewers on 9 August 2009. Seven introduced Australia's first catch up channel 7TWO (now branded as 7two) on 1 November 2009. On 22 July 2010, the ABC launched its proposed news channel, ABC News (then ABC News 24). In addition, the Seven and Nine networks launched their third channels in September 2010: 7mate from Seven and 9Gem (then GEM) from Nine. Network Ten launched their third channel, 10 Peach, on 11 January 2011 as Eleven. On 26 November 2015, Nine launched their fourth channel, 9Life, along with a relaunch of 9HD as well as all the channels merging with Nine. On 28 February 2016, Seven launched their fourth channel, 7flix. On 2 March 2016, Ten relaunched their HD channel, 10 HD. On 10 May 2016, Seven relaunched their HD channel, 7HD. On 6 December 2016, the ABC relaunched their HD channel, ABC HD.

VK3RTV is an experimental Amateur Television Repeater licensed by the ACMA to Amateur Radio Victoria. In late September 2009 the former single analogue channel was converted to a 2 channel DVB T digital system. The output of the transmitter is on 445.5 MHz which can be received on some set top boxes and digital television sets. Both channels (VK3RTV1 and VK3RTV2) are transmitted in standard definition. This repeater has been re located from Olinda on Mt Dandenong to Mount View to the east of Melbourne. It is expected to be re activated in June 2020. Amateur Radio Operators are restricted in terms of the content they may transmit in that the transmission of entertainment is not allowed. However, Amateur Radio Operators are nonetheless able to transmit a wide range of educational material related to amateur radio & electronics.

A number of broadcasters, primarily commercial networks, have provided a number of digital only datacast or multiview services on separate channels – in particular during major sporting events. The Seven Network, for instance, provided two additional channels as part of its coverage of the 2003 Rugby World Cup – one providing alternate commentary, the other with statistics and game information. Seven also ran a similar service during its coverage of the 2004 Summer Olympics showing news headlines, a medal tally, and event results. Similarly in 2005 for the Melbourne Cup, Australian Open, Australian Open Golf, and the One Day International series from the United Kingdom, the Seven Network provided a multi view datacast service. As well as this, the Nine Network and NBN Television (now Nine Northern NSW) both provided a multi view service with additional text information during Pompeii: The Last Day. Digital Forty Four, a trial datacasting service, began in Sydney in 2003. The service included at launch an electronic program guide, ABC News, Sport and Weather datacast service, the Australian Christian Channel, shopping channel Expo and a number of federal parliament audio streams. The service, licensed by the Australian Communications and Media Authority, ceased broadcasting at midnight on the night of 30 April 2010. Three metropolitan networks once provided video program guide datacast channels in addition to their standard and high definition channels. Nowadays, during ABC TV Plus', ABC Me's and ABC Kids' downtime, those Australian Broadcasting Corporation channels show their channel logo and the time they are back on air, with music from ABC's radio networks, Double J and ABC Jazz. Other channels were launched, such as TV4ME, ishop TV, Extra, Gold, TVSN, Spree TV, Aspire TV and Fresh Ideas TV.

At a minimum, all digital television broadcasters in Australia provide a 576i standard definition service, in addition to high definition. The 576p50 format is also considered an HDTV format, as it has higher vertical resolution through the use of progressive scanning. When Australia started DVB T in 2001 several networks broadcast high definition in a 576p format as this could give better quality on 50 Hz scanning CRT TVs and was not as demanding on MPEG 2 bit rate. Since many modern television sets have an interlace to progressive scan conversion there is little difference in picture quality. MPEG 2 encoders have also improved so the more conventional 720p and 1080i formats are now used. Currently, national public broadcasters ABC and SBS, and metropolitan commercial networks Seven, Nine and 10 have 1080i high definition services which, since 2015, simulcast their main channel from standard definition. Prior to this, HD broadcasts were shown as a multichannel providing different content from the main SD channel. In addition, most of the commercial networks' regional affiliates also carry a HD simulcast of the main SD channel. Quotas on high definition content – a minimum of 1040 hours per year – were imposed by the Australian government in July 2003 on broadcasters in Sydney, Melbourne, Brisbane, Adelaide and Perth. The same requirement was extended in April 2005 to stations in Darwin, regional New South Wales and regional Queensland, and in January 2006 in Mildura. As of 13 July 2007 commercial television networks in Australia were permitted to provide a separate standard definition and high definition channel. As of January 2009, they were permitted 2 standard definition channels in addition to the high definition channel – the networks planned to launch these via Freeview. However, in August 2015, the government finally lifted the SD Primary Channel mandate, allowing broadcasters to simulcast their respective main channel programmes in high definition.

The transition from analogue to digital television was co ordinated by the Digital Switchover Taskforce operating under the federal Department of Broadband, Communications and the Digital Economy. Until the switch off in the respective areas, free to air broadcasts were simulcast, along with digital only channels like ABC TV Plus (then ABC2). Cable television networks began simulcasting in 2004 and analogue cable services were switched off in April 2007.

In November 2008, all free to air broadcasters (both metropolitan and regional) joined to launch the Freeview brand name as a consistent marketing platform for digital broadcasting to compete against subscription television in Australia, with the actual Freeview service commencing in March 2009.

Perth community station Access 31's closure was partially blamed on viewers and revenue lost to increasing digital television viewership. The analogue only station had been campaigning with other community television stations for support from the Federal Government that allowed them access to the digital broadcast spectrum. On 4 November 2009, Communications Minister Stephen Conroy approved a Digital TV only licence for West TV in Perth, which allows them to broadcast as a digital only community television station as a replacement for the now defunct Access 31. Digital services were available in most areas, however parts of Western Australia and Central Australia had yet to begin transmissions in 2007.

To aid the digital television switchover, households receiving government assistance payments were eligible to have a set top box provided free of charge to convert to digital television. In addition to set top boxes, the assistance included any necessary cabling or antenna upgrades needed to achieve a reliable digital signal.