What does DSP mean in cars?

[VanHolden]

DSP in cars is an audio processor, specifically an audio enhancement processor that achieves special sound effects like enhanced surround stereo, and performs certain modifications to the audio signal. While DSP amplifiers possess the functions of other amplifiers, they can also attenuate overlapping frequencies caused by the car's interior environment, add frequencies that the environment has attenuated, and adjust the distance between each speaker in the car and the human ear. The main features of DSP processors are: 1. Separate program and data spaces, allowing simultaneous access to instructions and data; 2. On-chip fast RAM, typically accessible via independent data buses in two blocks simultaneously; 3. Hardware support for low-overhead or no-overhead loops and jumps.