Audio processor and method for generating a frequency enhanced audio signal using pulse processing

A method of generating a frequency enhanced audio signal from a source audio signal, comprising:

• determining a temporal envelope of at least a portion of the source audio signal;
• analyzing the temporal envelope to determine local maxima or local minima as temporal values of certain features of the temporal envelope;
• placing pulses in relation to the temporal values of certain features in a synthesis signal, wherein, in the synthesis signal, the placed pulses are weighted using weights derived from amplitudes of the temporal envelope related to the temporal values of the certain features, at which the pulses are placed;
• and
• combining at least a band of the synthesis signal that is not comprised in the source audio signal and the source audio signal to acquire the frequency enhanced audio signal.

A non-transitory digital storage medium having stored thereon a computer program for performing a method of generating a frequency enhanced audio signal from a source audio signal, comprising:

• determining a temporal envelope of at least a portion of the source audio signal;
• analyzing the temporal envelope to determine local maxima or local minima as temporal values of certain features of the temporal envelope;
• placing pulses in relation to the temporal values of the certain features in a synthesis signal, wherein, in the synthesis signal, the placed pulses are weighted using weights derived from amplitudes of the temporal envelope related to the temporal values of the certain features, at which the pulses are placed;
• and
• combining at least a band of the synthesis signal that is not comprised in the source audio signal and the source audio signal to acquire the frequency enhanced audio signal,
• when said computer program is run by a computer.