NEUROEVOLUTION-BASED ARTIFICIAL BANDWIDTH EXPANSION OF TELEPHONE BAND SPEECH

摘要

Artificial bandwidth expansion devices, systems, methods and computer code products are disclosed for expanding a narrowband speech signal into an artificially expanded wideband speech signal. Embodiments of the invention can operate by forming an unshaped wideband signal based on the narrowband speech signal, such as through aliasing, and shaping the wideband signal into the artificially expanded wideband speech signal by amplifying/attenuating the unshaped wideband signal using a function generated by a neural network. Weights of the neural network can be set by a training/learning subsystem which generates genomes containing the neural network weights based on simulated environments in which a device employing the artificial bandwidth expansion is expected to operate.