V2EX spectral envelope

Spectral Envelope

Definition / 定义

频谱包络:在频谱(各频率成分的能量分布)上,用一条平滑曲线概括整体“形状”的表示方法,常用于语音与音频分析中描述音色(如共振峰/共鸣结构)的总体分布。该短语在信号处理、语音学、音乐科技里很常见。(也可泛指任何频谱的整体外形/轮廓。)

Pronunciation / 发音

/spktrl nvlop/

Examples / 例句

The spectral envelope helps explain why two instruments sound different.
频谱包络有助于解释为什么两种乐器听起来不一样。

By modeling the spectral envelope of the singer’s voice, the engineer could reshape the timbre without changing the pitch.
通过对歌手声音的频谱包络建模,工程师可以在不改变音高的情况下重新塑造音色。

Etymology / 词源

spectral 来自 spectrum(“光谱/频谱”,源于拉丁语 spectrum,意为“影像、显现”),在现代科学语境中引申为“与频谱有关的”。envelope 原意是“信封、包裹”,引申为“外层包络/外轮廓”。合起来 spectral envelope 就是“频谱的外轮廓/包络线”,即对频谱整体形状的概括。

Related Words /相关词

Literary Works / 文学作品

  • The Computer Music Tutorial(Curtis Roads)
  • The Scientist and Engineer’s Guide to Digital Signal Processing(Steven W. Smith)
  • Speech and Language Processing(Daniel Jurafsky & James H. Martin)
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