Before revision: Although converting an analog signal to digital form introduces a low-level quantization noise into the signal due to finite resolution of digital systems, once in digital form, the signal potentially can be transmitted, stored, and processed without introducing additional noise or distortion.
After revision: In contrast, although converting an analog signal to digital form introduces a low-level quantization noise into the signal due to finite resolution of digital systems, once in digital form, the signal potentially can be transmitted, stored, and processed without introducing additional noise or distortion.