DSP - convolution and its real time application...

1. for error correction. With convolution, it is possible to correct several error bits and detect more error bits.
2. for anti-noise. interleaving can make the sudden noise be averaged, so that it may be corrected or detected.
Anyway, all for better voice quality etc.

Can you explain about this a bit detail...

yeah, take any free online course in communications dsp. study for a change

Thanks.. Pl. suggest me a good online course in DSP.