11,2.2 Round-off Noise /986 Product of two Wbit fixed-point fractions is a (2 W1)bit number.This product must eventually be quantized to Wbits by rounding or truncation, which results in round-off noise. 2021年2月 72021年2月 7 11.2.2 Round-off Noise  Product of two W-bit fixed-point fractions is a (2W-1) bit number. This product must eventually be quantized to W-bits by rounding or truncation, which results in round-off noise