The difference between car AUX and USB interfaces

The differences are as follows:

1. Different functions

AUX can only be connected to the external audio device interface, and the audio is played through the external device. The power amplifier is provided by the car's audio system. The system is complete.

USB has more functions than AUX. It can connect external devices through USB interface. It can transfer data, copy files, etc.

2. Different speeds

The USB interface has faster transmission speed and universal scalability than AUX. USB 1.1 can achieve a rate of 12 Mbps, and USB 2.0 can reach a rate of 480 Mbps. rate.

3. Different usage conditions

AUX interface: To use the AUX interface, you must be equipped with an audio transmission line with three-section plugs at both ends (formerly called a recording line). The sound quality is quite shocking, comparable to that of car CDs. It should be pointed out that ordinary wires will suffer from signal instability, noise, etc. Good materials can ensure high-fidelity and lossless sound quality.

USB interface: Ordinary DVD (or CD) audio hosts in cars generally cannot edit or modify data files, picture files or audio and video files read from the USB interface. They can only play or open external connections. Audio, video files and image files in the memory. However, car CDs and DVDs, like mobile phones and computers, have compatibility restrictions on the capacity of external memory. For example, only a maximum of 64G external hard drives can be plugged in.

Extended information:

The AUX interface (Auxiliary) refers to the audio input interface, which can output the audio of electronic audio devices including mp3 (general headphone jack), and can be The car's audio system outputs music from these devices.

USB, the abbreviation of Universal Serial Bs (Universal Serial Bus), is an external bus standard used to standardize the connection and communication between computers and external devices. It is an interface technology applied in the PC field. The USB interface supports plug-and-play and hot-swappable functions of the device. USB was jointly proposed by Intel, Compaq, IBM, Microsoft and other companies at the end of 1994.

The next generation USB interface will have a change direction. The next generation Type-C USB interface can support both front and back insertion and has strong data transmission signal. However, currently (2014) manufacturers are limited.

As of December 26, 2015, many domestic manufacturers have used data cables based on this standard on a large scale in their own mobile phone devices.

Reference material: Baidu Encyclopedia-aux interface