Patent ID: 9706325
Date: 2017-07-11
CPC Classifications: G10L,H04B,H04S

Claim:
1. An apparatus for generating a stereo signal from a mono down-mixed signal, the apparatus comprising: at least one processing device configured to: calculate a first spatial parameter for up-mixing the mono down-mixed signal to the stereo signal, based on a second spatial parameter for up-mixing the mono down-mixed signal to a multi-channel signal other than the stereo signal; generate a first matrix for generating a direct signal and an input signal of a decorrelator; generate a second matrix, by using the calculated first spatial parameter; generate the direct signal and the input signal of the decorrelator, based on the first matrix and the mono down-mixed signal; decorrelate the input signal of the decorrelator; and mix the direct signal and the decorrelated signal, based on the second matrix, to generate the stereo signal.