List of digital television deployments by country information
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Map of digital terrestrial television broadcasting systems by country
This is a list of digital television deployments by country, which summarises the process and progress of transition from analogue to digital broadcasting.
The transition to digital television is a process that is happening at different paces around the world. Although digital satellite television is now commonplace, the switch to digital cable and terrestrial television has taken longer. See also Digital terrestrial television.
The major terrestrial broadcast standards are DVB-T (Europe), ATSC (North America), DTMB (China), and ISDB (two incompatible variations used in Japan and South America).
Not all deployments for a given standard are compatible. Countries that have adopted digital terrestrial recently may have a single MPEG4 based system for SD and HD, while countries with more established system may use MPEG2 for SD and MPEG4 for HD. There are also variations in middleware used. For example, Italy, Ireland and the UK are all DVB-T regions, but Ireland uses "MPEG4 + MHEG5 + DVB-T" for both SD and HD transmissions, while the UK uses "MPEG2 + MHEG5 + DVB-T" for SD and "MPEG4 + MHEG5 + DVB-T2" for HDTV, and Italy uses MHP rather than MHEG5 middleware. Since all MPEG4-capable receivers can decode the MPEG2 codec and all DVB-T2 tuners are capable of tuning DVB-T signals, UK HD set-top boxes are compatible with both the UK SD system and Irish SD/HD system, but Irish SD/HD tuners will only work with the SD system used in the UK. Digital cable broadcast tends to be DVB-C or very similar QAM in almost all countries. Broadband on cable is mostly DOCSIS which is DVB-C on the download path. This is important when buying a TV or set-box online rather than from a local retailer who would normally only stock the compatible system. Incompatible retail products are a severe problem in emerging retail digital markets where a neighbouring country has an older standard and dominates the retail trade, such as UK Freeview (rather than compatible "Freeview HD") products in Ireland.[citation needed]
Important DVB-T standards are UK D-book for UK Freeview and Nordig 2.2[1] for Scandinavia and Ireland. Ireland deviates from Nordig by using UK profile MHEG5 middleware rather than MHP.[2]
^"NorDig Integrated Receiver Decoder Specification" (PDF). Archived from the original (PDF) on 2010-12-07. Retrieved 2011-12-30.
^"Comparison of Nordig and UK D-Book for DVB" (PDF). Teracom. Archived from the original (PDF) on 2011-03-13.
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