A Probabilistic Subspace Model for Multi-instrument Polyphonic Transcription
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چکیده
• Non-negative matrix factorization (NMF) [3] solves V ≈ WH • V is the f -by-t magnitude STFT of the audio • W contains note spectra in its columns and represents the source model(s) • H contains note activations in its rows and gives the transcription • Rank of decomposition corresponds to number of distinct pitches • Can handle multiple instruments by interpreting W and H in block-form (i.e. V ≈ ∑ sW sHs)
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تاریخ انتشار 2010