Topic: Digital Signal Processing
In Digital Filters, how many interpolated data points are inserted between samples when performing 4X over sampling?
- A. 2
- B. 3
- C. 4
- D. 5
Answer: B. 3
Explanation: When performing an $L$-times oversampling (interpolation), $L-1$ zeros (or interpolated data points) are inserted between consecutive original samples. For 4X oversampling, $L=4$, therefore $4-1 = 3$ interpolated points are inserted.