Verfahren und Vorrichtung zum Erfassen eines Anschlags in einem zeitdiskreten Audiosignal sowie Vorrichtung und Verfahren zum Codieren eines Audiosignals

The beat detection method has the time discrete audio signal divided into segments of equal length, before filtering the audio signal within each segment and comparing the energy of the filtered signal with the energy of the filtered signal for the preceding segment, to detect the beat. Alternatively the ratio between the energies of the filtered and unfiltered signals for the same segment is obtained and compared with a corresponding preceding ratio for detection of the beat. USE - For coding of audio signals for data reduction. ADVANTAGE - Allows time-frequency transformation to be matched to audio signal transient characteristics.