According to information resources, the processing levels of information transmission can be divided into (), () and ().

According to the processing level of information resources, it can be divided into three levels: coding, transmission and decoding.

Coding: In the process of information transmission, information is converted into a specific signal or symbol form so that it can be transmitted in the transmission medium. Coding is the process of transforming information into a transmittable form. Information can be converted into specific formats or coding rules by different coding methods, such as coding text information into binary data.

Transmission: Transmission refers to the process of transmitting coded information to the receiver through some medium or communication network. Transmission can be through wired or wireless communication, such as cable, optical fiber, satellite, etc.

Decoding: Decoding is the process that the receiver parses and restores the transmitted information. The receiver converts the received signal or symbol into understandable information form by decoding, and restores the content of the original information.

These three levels are closely connected and constitute the basic process of information transmission. Encoding converts information into a transmittable form, transmission transmits the encoded information from the sender to the receiver, and decoding restores the received information to the original content. In this way, information can be transmitted and exchanged in different media.

The purpose of information introduction is to convey specific knowledge, facts or concepts to others, so as to increase their understanding and knowledge of the subject. Information can be introduced in many ways, such as written words, oral statements, presentations, charts, pictures, videos, etc. No matter what form it takes, the information introduction should be clear, accurate and organized, and it should be properly selected and presented according to the needs and background of the audience.