High-definition set-top box refers to the equipment needed to watch high-definition TV. Besides satisfying the high-definition channels, it also has the network function of high-definition interactive digital TV, and enjoys "one-stop" online services such as online education, online appointment registration and online payment.

On September 28th, 2009, the first program of CCTV will be broadcast in high definition and standard definition simultaneously with Beijing Satellite TV, Shanghai Oriental TV, Jiangsu Satellite TV and Hunan Satellite TV. Beijing began to distribute high-definition set-top boxes, and users received them free of charge with their ID cards.

Brief introduction of simple mode

"Simple mode" is to improve the convenience of the elderly to use various functions of smart TV and improve their visual and auditory experience when watching smart TV by using assistive technologies or assistive functions. After the smart TV is turned on, users should be allowed to select "simple mode" with one click. In this mode, the elderly should be able to choose live TV and third-party content conveniently.

According to the needs of the elderly, the standard also has corresponding provisions on remote control settings. For example, products should have clear, recognizable and durable key labels, the minimum touch area of keys should be not less than 6mm×6mm, and there should be a certain interval between keys.