数字信号处理器（英语：digital signal processor，DSP）是一种专用于（通常为实时的）数字信号处理的微处理器。

• 分开的进程存储器和数据存储器（哈佛结构）。
• 用於单指令流多数据流（SIMD）作业的特殊指令集。
• 可进行并行处理，但不支持多任务。
• 用于宿主环境时可作为直接内存访问（DMA）设备运作。
• 从模拟数字转换器（ADC）获得数据，最终输出的是由数字模拟转换器（DAC）转换为仿真信号的数据。

A digital signal processor (DSP) is a specialized microprocessor (or a SIP block), with its architecture optimized for the operational needs of digital signal processing.

The goal of DSPs is usually to measure, filter and/or compress continuous real-world analog signals. Most general-purpose microprocessors can also execute digital signal processing algorithms successfully, but dedicated DSPs usually have better power efficiency thus they are more suitable in portable devices such as mobile phones because of power consumption constraints. DSPs often use special memory architectures that are able to fetch multiple data and/or instructions at the same time.