Speech Enhancement: Theory and Practice, Second Edition

With the proliferation of mobile devices and hearing devices, including hearing aids and cochlear implants, there is a growing and pressing need to design algorithms that can improve speech intelligibility without sacrificing quality. Responding to this need, Speech Enhancement: Theory and Practice, Second Edition introduces readers to the basic problems of speech enhancement and the various algorithms proposed to solve these problems. Updated and expanded, this second edition of the bestselling textbook broadens its scope to include evaluation measures and enhancement algorithms aimed at improving speech intelligibility.

Fundamentals, Algorithms, Evaluation, and Future Steps

Organized into four parts, the book begins with a review of the fundamentals needed to understand and design better speech enhancement algorithms. The second part describes all the major enhancement algorithms and, because these require an estimate of the noise spectrum, also covers noise estimation algorithms. The third part of the book looks at the measures used to assess the performance, in terms of speech quality and intelligibility, of speech enhancement methods. It also evaluates and compares several of the algorithms. The fourth part presents binary mask algorithms for improving speech intelligibility under ideal conditions. In addition, it suggests steps that can be taken to realize the full potential of these algorithms under realistic conditions.

What’s New in This Edition

• Updates in every chapter
• A new chapter on objective speech intelligibility measures
• A new chapter on algorithms for improving speech intelligibility
• Real-world noise recordings (on accompanying CD)
• MATLAB^® code for the implementation of intelligibility measures (on accompanying CD)
• MATLAB and C/C++ code for the implementation of algorithms to improve speech intelligibility (on accompanying CD)

Valuable Insights from a Pioneer in Speech Enhancement

Clear and concise, this book explores how human listeners compensate for acoustic noise in noisy environments. Written by a pioneer in speech enhancement and noise reduction in cochlear implants, it is an essential resource for anyone who wants to implement or incorporate the latest speech enhancement algorithms to improve the quality and intelligibility of speech degraded by noise.

Includes a CD with Code and Recordings

The accompanying CD provides MATLAB implementations of representative speech enhancement algorithms as well as speech and noise databases for the evaluation of enhancement algorithms.

隨著移動設備和聽力設備（包括助聽器和人工耳蝸植入）的普及，設計能夠提高語音清晰度而不損失音質的算法變得越來越迫切和重要。為了滿足這一需求，《語音增強：理論與實踐，第二版》向讀者介紹了語音增強的基本問題以及提出解決這些問題的各種算法。這本暢銷教材的第二版進行了更新和擴充，將其範圍擴大到包括評估指標和旨在提高語音清晰度的增強算法。

本書分為四個部分，首先回顧了理解和設計更好的語音增強算法所需的基礎知識。第二部分描述了所有主要的增強算法，並且由於這些算法需要對噪聲頻譜進行估計，還介紹了噪聲估計算法。本書的第三部分介紹了用於評估語音增強方法的性能（語音質量和清晰度）的指標，並對多種算法進行了評估和比較。第四部分介紹了在理想條件下提高語音清晰度的二進制遮罩算法。此外，它還提出了在現實條件下實現這些算法的潛力的相應措施。

本版的新特點包括：
- 每章的更新內容
- 一個新的章節介紹客觀語音清晰度評估指標
- 一個新的章節介紹提高語音清晰度的算法
- 實際噪聲錄音（附帶的CD）
- 用於實現語音清晰度評估指標的MATLAB代碼（附帶的CD）
- 用於實現提高語音清晰度算法的MATLAB和C/C++代碼（附帶的CD）

本書由人工耳蝸植入的語音增強和降噪領域的先驅者撰寫，清晰而簡潔地探討了人類聽眾在嘈雜環境中如何補償聲學噪聲。對於任何希望實施或結合最新的語音增強算法以提高被噪聲降低的語音質量和清晰度的人來說，這是一本必不可少的資源。

附帶的CD提供了代表性語音增強算法的MATLAB實現，以及用於評估增強算法的語音和噪聲數據庫。