METHOD FOR PROCESSING AN AUDIO SIGNAL

摘要

A known technique to compensate speaker frequency response and convey the illusion of more powerful bass sounds to the listener is to the divide the audio signal into a first and a second way, whereby harmonic waves of lower frequency signal fractions are produced and mixed with the signal of the first way. In order to improve reproduction in speakers with deficient bass range, the audio signal is band-pass filtered (BP1) in the second way (P2) with a weighted (M1) correction factor GC, it is amplified with an amplification factor G (AM) and it is then limited to a maximum value (NL1). The audio signal is finally band-pass filtered (BP2) once again before being added to the original audio signal (Xin) in the first way (P1). The correction factor GC is reduced if the maximum value is exceeded. Said factor remains otherwise constant or is increased. These measures make it possible to produce upper harmonic waves using a lower frequency audio signal and to mix said upper harmonic waves with the original audio signal.