http://swrc.ontoware.org/ontology#TechnicalReport
Spectrogram consistency and its application to phase reconstruction
en
音楽音響信号処理（２）
NTTコミュニケーション科学基礎研究所
NTTコミュニケーション科学基礎研究所
東京大学大学院情報理工学系研究科
東京大学大学院情報理工学系研究科
JonathanLeRoux
Hirokazu Kameoka
Nobutaka Ono
Shigeki Sagayama
In this article, we derive the constraints which a set of complex numbers must verify to be a consistent STFT spectrogram, i.e., to be the STFT spectrogram of an actual real-valued signal, and describe how they lead to an objective function measuring the consistency of a set of complex numbers as a spectrogram. We then present a flexible phase reconstruction algorithm based on a local approximation of the consistency constraints and derive a real-time time-scale modification algorithm.
In this article, we derive the constraints which a set of complex numbers must verify to be a consistent STFT spectrogram, i.e., to be the STFT spectrogram of an actual real-valued signal, and describe how they lead to an objective function measuring the consistency of a set of complex numbers as a spectrogram. We then present a flexible phase reconstruction algorithm based on a local approximation of the consistency constraints and derive a real-time time-scale modification algorithm.
AN10438388
研究報告音楽情報科学（MUS）
2009-MUS-81
8
1-6
2009-07-22