BAYESIAN SPECTRAL MATCHING: TURNING YOUNG MC INTO MC HAMMER VIA MCMC SAMPLING
ICMC(2009)
摘要
In this paper, we introduce an audio mosaicing technique based on performing posterior inference on a probabilistic generative model. Whereas previous approaches to concate- native synthesis and audio mosaicing have mostly tried to match higher-level descriptors of audio or individual STFT frames, we try to directly match the magnitude spectrogram of a target sound by combining and overlapping a set of short samples at different times and amplitudes. Our use of the graphical modeling formalism allows us to use a stan- dard Markov Chain Monte Carlo (MCMC) posterior infer- ence algorithm to find a set of time shifts and amplitudes for each sample that results in a layered composite sound whose spectrogram approximately matches the target spectrogram.
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