Digital Communications: Reconstructing a 6kHz Speech Signal

[anarachy]

Homework Statement

Consider a speech signal with a maximum frequency of 6kHz. It is sampled at 10kHz and stored. Suggest a scheme to reconstruct the toll-quality speech signal as close to the original signal as possible.

Homework Equations

The Attempt at a Solution

 

[lewando]

What are your thoughts on this? There is a lot of freely-available information regarding this topic.