Olympic Broadcaster Services London (OBSL) is the host broadcasting organization for the 2012 Olympic games. NBC holds the US broadcast rights for the Olympics. CTV has the broadcast rights for Canada.

Since I am not sure what nation you are from, I will just give u the list of TV coverage I saw from wikipedia:

In Austria, ORF will broadcast the games.

In Denmark, Danmarks Radio and TV 2 will have the primary rights to broadcast the games.

In Estonia Eesti Televisioon (ETV) will be broadcasting the games.

In France, France T幨憝isions (competitions) and TF1 (ceremonies) have the right to broadcast the games.68

In Germany and Austria, ARD, ZDF, ProSiebenSat.1 and RTL Group have the rights to broadcast the games.

In Greece, the national broadcaster ERT has the rights to broadcast the games.

In Iceland, R渶 will broadcast the games.

In Ireland, RTÉ will broadcast all of the games.
Italy, SKY Italia originally achieved rights, then was forced by the International Olympic Committee to sell part of them (200 hours) to RAI on 17 September 2008 along with the Vancouver 2010 ones, in an Olympics/FIFA World Cup rights exchange,69 and due to compulsory free broadcasting of the event in the country.

In Lithuania, LTV and LTV2 will broadcast the games.

In the Netherlands, free-to-air public broadcaster NOS have the rights to broadcast the games.

In Poland, TVP will broadcast the games.

In Portugal, RTP will broadcast the games.

In Romania, TVR will broadcast the games.

In Slovakia, Slovenska televizia and Radio Slovakia will broadcast the games.

In Spain, TVE has the rights to broadcast these games.

In Sweden, free-to-air SVT and Viasat have the rights to broadcast the games.

In the United Kingdom the BBC will be sole broadcaster of the Games70 and have made a commitment to show every event live.71

In Turkey, Fox Turkey has the rights to broadcast the games.72

In the United States, NBC Universal has the rights to the games.73 Coverage will appear on the flagship NBC, and presumably its sister properties, such as Spanish-language network Telemundo and cable channels USA, CNBC, Bravo and MSNBC.
In South Korea, SBS, MBC, and KBS have the rights to broadcast the games.

In Canada, CTV, Rogers Sportsnet, V, TSN and RDS have the rights to broadcast the games, as part of Canada's Olympic Broadcast Media Consortium.74

In Brazil, Rede Record has the exclusive rights to broadcast the games free-to-air, but sells the cable rights to Sportv and internet rights to Terra Networks.75

In Guatemala the four major national networks (Channels 3, 7, 11, and 13) will broadcast the games

In Mexico, the two major national networks, Televisa and TV Azteca, will broadcast the games

In Chile, TVN and Canal 13 will broadcast the games.
In Panama, two of the major national networks TvMax Channel 9 and RPC Channel 4 will broadcast the games.

In Australia, the Nine Network in joint partnership with subscription television partner Foxtel will broadcast the games. This would be the first time in over 25 years that the Seven Network has not aired the summer games, and the second considering both Olympics.

In New Zealand, free-to-air Prime Television New Zealand and pay TV parent company SKY Network Television have the rights to these games.76 This will be the first time the Olympic Games coverage is not carried on a TVNZ network.needed

In the People's Republic of China, China Central Television and China Radio will broadcast the games.

In Jamaica, Television Jamaica and CVM Television will live broadcast of 2012 Olympics Games in London.
Eurosport also provided live coverage of events to viewers across the EU and Europe.