Spectral modeling synthesis
出典: フリー百科事典『ウィキペディア（Wikipedia）』 (2023/04/18 00:20 UTC 版)
Spectral modeling synthesis (SMS; スペクトラルモデリング合成) は正弦波と色付きノイズを用いた楽音分析合成手法[2]および音声分析合成手法である[3]。
- ^ Roads 1996, p. 153, Figure 4.23: Overview of spectrum modeling synthesis.
- ^ 本手法は調波解析/調波合成に基づいており、その意図は調波成分が主役となる楽音の音響分析と音響合成である。
- ^ Serra & Smith 1990, p. 12. "It describes a technique called spectral modeling synthesis [SMS], that models time-varying spectra as (1) a collection of sinusoids controlled through time by piecewise linear amplitude and frequency envelopes (the deterministic part), and (2) a time-varying filtered noise component (the stochastic part). The analysis procedure first extracts the sinusoidal trajectories by tracking peaks in a sequence of short-time Fourier transforms. These peaks are then removed by spectral subtraction. The remaining “noise floor” is then modeled as white noise through a time-varying filter. A piecewise linear approximation to the upper spectral envelope of the noise is computed each successive spectrum, and the stochastic part is synthesized by mean of the overlap-add technique."
- ^ 加法性ホワイトガウスノイズ (AWGN): パワースペクトル(周波数領域の強度)が全周波数で同じ強度(＝白色)で、振幅分布(時間領域の強度)がガウス分布に従うノイズ
- ^ McAulay & Quatieri 1988, p. 161, Fig. 8. "This block diagram of the sinusoidal analysis/synthesis system illustrates the major functions subsumed within the system. Neither voicing decisions nor residual waveforms are required for speech synthesis."
[続きの解説]
「Spectral modeling synthesis」の続きの解説一覧
- 1 Spectral modeling synthesisとは
- 2 Spectral modeling synthesisの概要
- 3 参考文献
- 4 外部リンク
- Spectral modeling synthesisのページへのリンク
