Verfahren und Vorrichtung zur Extraktion einer einem Audiosignal zu Grunde liegenden Melodie

US2006075884 A UPAB: 20060510 NOVELTY - The device has a provider providing a time/spectral representation of an audio signal. A scaler scales the time/spectral representation using curves of equal volume reflecting a human volume perception in order to obtain a perception-related time/spectral representation. A key determinater (308) determines a melody of the audio signal on the basis of the perception-related time/spectral representation. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for the following: (A) a method for extracting a melody underlying an audio signal (B) a computer program having a program code to perform melody extraction method. USE - Used for extracting a melody of an audio signal, used for the generation of ring tones for mobile telephones from any audio signal, like e.g. singing, humming, whistling or the like. ADVANTAGE - The key determinater determines the melody of the audio signal on the basis of the perception-related time/spectral representation, thus efficiently generating ring tones e.g. polyphonic ring tone, from the audio signal at a reduced cost in a simple manner