公开(公告)号：GB2522644A

公开(公告)日：2015-08-05

申请号：GB201401626

申请日：2014-01-31

Applicant: NOKIA TECHNOLOGIES OY

Inventor： ERONEN ANTTI JOHANNES ,  CURCIO IGOR DANILO DIEGO ,  OJANPERA JUHA PETTERI ,  ROININEN MIKKO JOONAS

IPC: G10H1/40

Abstract: A technique for audio processing comprises obtain­ing one or more sets of features descriptive of characteris­tics of a segment of audio signal representing a piece of music and deriving a club score that is indicative of at least beat strength associated with the segment of audio signal on the basis of said features. The sets of features comprise at least the following: beat tracking (BT) features descriptive of periodicity of the audio segment; fluctuation pattern (FP) features descriptive of modulation energies at a set of modulation frequencies across a set of frequency bands in the audio segment; detrended fluctuation (DF) features descriptive of correlations across different time scales in the audio segment; and energy features descriptive of the signal energy within the audio segment. According to another embodiment, the technique comprises obtaining one or more audio attributes characterizing a segment of audio signal representing a piece of music, the audio at­tributes possibly including the club score, and selecting a switching pattern based at least in part on the au­dio attributes, wherein a switching pattern indicates temporal locations for introduction of discontinui­ties in visual content associated with said segment of au­dio signal in relation to temporal locations of beats or downbeats.