At present, infrared remote controllers are basically mathematical signals, and the coded control signals are transmitted by digital carriers. Only the early remote controllers were analog signals.

Remote control technology, also known as remote control technology, refers to the remote control of the controlled object, which is widely used in industrial control, aerospace, home appliances and other fields.

Infrared remote control is a wireless non-contact control technology, which has obvious advantages such as strong anti-interference ability, reliable information transmission, low power consumption, low cost and easy implementation. It is widely used by many electronic devices, especially household appliances, and is increasingly used in computers and mobile phone systems.