Signal-adaptive remixing of separated audio sources

A method for processing audio signals, comprising:

• a source separation step obtaining, from an input signal evolving in time along a discrete succession of time instants or time slots, a target signal and at least one residual signal to be subsequently remixed according to at least one remixing gain variable along the discrete succession;
• a control step determining, for a determined current time instant or time slot, a first, relative metrics in the determined current time instant or time slot, wherein the first, relative metrics compares a level of the target signal with a level of the input signal, or the at least one residual signal, in the determined current time instant or time slot;
• and
• a temporal context step determining temporal context information based on a second, relative metrics in at least one future and/or past time instant or time slot, the second, relative metrics comparing a level of the target signal with a level of the input signal or the at least one residual signal in the at least one future and/or past time instant or time slot, the at least one future time instant or time slot being, in the discrete succession, after the determined current time instant or time slot, and the past time instant or time slot being, in the discrete succession, before the determined current time instant or time slot,
• the method comprising generating at least one remixing gain based on:
• the first, relative metrics in the determined current time instant or time slot;
• and
• the temporal context information.

A non-transitory digital storage medium having a computer program stored thereon to perform the method for processing audio signals, the method comprising:

• a source separation step obtaining, from an input signal evolving in time along a discrete succession of time instants or time slots, a target signal and at least one residual signal to be subsequently remixed according to at least one remixing gain variable along the discrete succession;
• a control step determining, for a determined current time instant or time slot, a first, relative metrics in the determined current time instant or time slot, wherein the first, relative metrics compares a level of the target signal with a level of the input signal, or the at least one residual signal, in the determined current time instant or time slot;
• and
• a temporal context step determining temporal context information based on a second, relative metrics in at least one future and/or past time instant or time slot, the second, relative metrics comparing a level of the target signal with a level of the input signal or the at least one residual signal in the at least one future and/or past time instant or time slot, the at least one future time instant or time slot being, in the discrete succession, after the determined current time instant or time slot, and the past time instant or time slot being, in the discrete succession, before the determined current time instant or time slot,
• the method comprising generating at least one remixing gain based on:
• the first, relative metrics in the determined current time instant or time slot;
• and
• the temporal context information,
• when said computer program is run by a computer.