Method for generating surround channel audio

A method of generating surround channel audio in a front channel only stereo audio system from a surround channel audio signal comprising a front audio channel signal and a surround channel signal, comprising:

• transforming the front audio channel signal and the surround channel signal into frequency-domain signals;
• extracting a difference value of the transformed front audio channel signal and the transformed surround channel signal;
• training a deep neural network (DNN) model using the difference value and the transformed front audio signal to obtain a DNN parameter;
• normalizing the transformed front audio channel signal;
• calculating an estimated difference value of the front audio channel signal and the surround channel signal from the normalized transformed front audio channel signal and the DNN parameter;
• deriving an estimated transformed surround channel signal based on the front audio channel signal and the estimated difference value;
• deriving an final audio signal for play in the front channel only stereo system by converting the estimated transformed surround channel signal into a time domain;
• and
• playing the final audio signal in the front channel only stereo system.