It is a device which converts analog signals (such as sound or voice from microphone), to digital data so that the signal can be processed by a digital circuit such as a digital signal processor.

• 该转换器将模拟信号（如麦克风传出的话音信号）转换成数字信号后，送入诸如数字信号处理器这样的的数字线路进行处理。