I mean write the reply to my answer in English

Okay, I will reply in English from now on.

• Baseband Transmission: This method sends digital signals directly over the communication medium without modulation. The entire bandwidth of the channel is used for a single signal at any given time.

• Broadband Transmission: This method modulates the digital signal onto a high-frequency carrier wave. This allows the channel's bandwidth to be divided into multiple sub-channels, enabling several signals to be transmitted simultaneously.

The key difference is that baseband uses the entire channel for one signal, while broadband divides the channel to carry multiple signals at once.