Editing Broadcast television systems (section)

{{Short description|Standards for terrestrial television signals}}
{{Use dmy dates|date=January 2025}}
{{For|the company|Broadcast Television Systems Inc.}}

'''Broadcast''' '''television systems''' (or '''terrestrial television systems''' outside the US and Canada) are the encoding or formatting systems for the transmission and reception of [[terrestrial television]] signals.

[[Analog television]] systems were standardized by the [[International Telecommunication Union]] (ITU) in 1961,<ref name="auto1">[http://www.itu.int/dms_pub/itu-r/opb/act/R-ACT-RRC.1-1961-PDF-E.pdf Final acts of the European Broadcasting Conference in the VHF and UHF bands. Stockholm, 1961.]</ref> with each system designated by a letter ([[CCIR System A|A]]-[[CCIR System N|N]]) in combination with the color standard used ([[NTSC]], [[PAL]] or [[SECAM]]) - for example PAL-B, NTSC-M, etc.). These analog systems for TV broadcasting dominated until the 2000s.

With the introduction of [[digital terrestrial television]] (DTT), they were replaced by four main systems in use around the world: [[ATSC standards|ATSC]], [[DVB]], [[ISDB]] and [[Digital Terrestrial Multimedia Broadcast|DTMB]].