Multi-channel signal generator, audio encoder and related methods relying on a mixing noise signal

A method of generating a multi-channel signal comprising a first channel and a second channel, comprising:

• generating a first audio signal using a first audio source;
• generating a second audio signal using a second audio source;
• generating a mixing noise signal using a mixing noise source;
• and
• mixing the mixing noise signal and the first audio signal to acquire the first channel and mixing the mixing noise signal and the second audio signal to acquire the second channel, the method comprising:
• using a first amplitude element influencing an amplitude of the first audio signal;
• using a first adder adding an output signal of the first amplitude element and at least a portion of the mixing noise signal;
• using a second amplitude element influencing an amplitude of the second audio signal;
• using a second adder adding an output of the second amplitude element and at least a portion of the mixing noise signal,
• wherein an amount of influencing performed by the first amplitude element and an amount of influencing performed by the second amplitude element are equal to each other or the amount of influencing performed by the second amplitude element is different by less than 20 percent of the amount performed by the first amplitude element,
• wherein mixing uses a third amplitude element influencing an amplitude of the mixing noise signal,
• wherein an amount of influencing performed by the third amplitude element depends on the amount of influencing performed by the first amplitude element or the second amplitude element, so that the amount of influencing performed by the third amplitude element becomes greater when the amount of influencing performed by the first amplitude element or the amount of influencing performed by the second amplitude element becomes smaller.

A non-transitory digital storage medium having stored thereon a computer program for performing a method of generating a multi-channel signal comprising a first channel and a second channel, comprising:

• generating a first audio signal using a first audio source;
• generating a second audio signal using a second audio source;
• generating a mixing noise signal using a mixing noise source;
• and
• mixing the mixing noise signal and the first audio signal to acquire the first channel and mixing the mixing noise signal and the second audio signal to acquire the second channel, the method comprising:
• using a first amplitude element influencing an amplitude of the first audio signal;
• using a first adder adding an output signal of the first amplitude element and at least a portion of the mixing noise signal;
• using a second amplitude element influencing an amplitude of the second audio signal;
• using a second adder adding an output of the second amplitude element and at least a portion of the mixing noise signal,
• wherein an amount of influencing performed by the first amplitude element and an amount of influencing performed by the second amplitude element are equal to each other or the amount of influencing performed by the second amplitude element is different by less than 20 percent of the amount performed by the first amplitude element,
• wherein mixing uses a third amplitude element influencing an amplitude of the mixing noise signal,
• wherein an amount of influencing performed by the third amplitude element depends on the amount of influencing performed by the first amplitude element or the second amplitude element, so that the amount of influencing performed by the third amplitude element becomes greater when the amount of influencing performed by the first amplitude element or the amount of influencing performed by the second amplitude element becomes smaller,
• when said computer program is run by a computer.