CCTV-1 (China Central Television) is the primary channel in CCTV, the national flagship terrestrial television network of the People's Republic of China. It broadcasts a range of programs from China Central Television Headquarters at East 3rd Ring Road in Beijing and is available to both cable and terrestrial television viewers. The terrestrial signal of CCTV-1 is free-to-air across China. However, due to copyright restrictions, the satellite signal of CCTV-1 is encrypted, and smartcards are necessary for decryption.
CCTV-1 HD is a simulcast network version of CCTV-1 in high-definition. All standard-definition content is upscaled to high-definition output. The rest of the programming hours consist of mainly upscaled resolution CCTV-1 simulcast. The horizontal resolution was increased to 1920 pixels. CCTV-1 HD was created specifically for the 2008 Summer Olympics and the 2008 Summer Paralympics at the Beijing National Stadium. For the duration of the 2012 Summer Olympics broadcasting was increased to 24 hours a day to provide extra coverage of the Summer Olympic Games events
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