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音频CODEC和普通ADC有什么区别



1、音频信号采集为什么要用专用的CODEC来实现,普通高精度高采样率ADC可以吗?

2、音频信号为什么要过采样。只是为了提高采样精度吗?如果只是为了提高采样精度,为什么不用高精度的ADC?

3、普通非音频信号可以用CODEC采集吗?