Artificial bandwidth extension

Due to limited bandwidth of telephony speech, extension of narrowband to wideband signal is of great importance in terms of improving the quality and intelligibility of speech signal. Here we present results for the following paper, comparing them with benchmark method by, Jax and Vary 2003.

• R. Peharz, G. Kapeller, P. Mowlaee, F. Pernkopf, "Modeling Speech with Sum-Product Networks: Application to Bandwidth Extension", ICASSP, pp. 3699 - 3703, 2014.Demo

Bandwidth extension of narrowband speech signal:

Wideband Speech	Narrowband Speech
HMM (Speaker-dependent)	SPN (Speaker-dependent)
HMM (Speaker-independent)	SPN (Speaker-independent)

---