Sound analysis, sound synthesis, and sound processing for audio and musical applications

适用于音频和音乐应用的声音分析、声音合成和声音处理

• 批准号: RGPIN-2018-05662
• 负责人: Depalle, Philippe
• 金额: $ 2.04万
• 依托单位: McGill University
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2019
• 资助国家: 加拿大
• 起止时间: 2019-01-01 至 2020-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=682798
• 关键词: Sound; analysis; sound; synthesis; processing

This research project aims at improving the accuracy and the adequacy of audio signal representations and modelling by benefiting from recent advances in signal processing techniques. More precisely the goal is to better address the dual nature of sound signals, which are often a mixture of temporal transients, and modulated frequency components. It will result in a better quality of sound processing, sound synthesis, and will nurture applied projects such as high-quality sound source separation or audio morphing.***This project is part and parcel of the so-called analysis/synthesis approach for sound synthesis and sound processing, an often-used approach in musical applications, but also in sound design, audio coding and sound recording. The basic goal of analysis/synthesis is to conceive relevant models to represent acoustical signals by a set of temporal functions (the control parameters) that controls a synthesis structure. These temporal functions can be generated in the abstract or extracted from a pre-recorded sound during the analysis process. Re-synthesis produces a signal that sounds perceptually identical to the original sound. By modifying and substituting control parameters, this analysis/synthesis scheme can provide for very refined and precise processing of sound material. For example, it may allow one to produce a family of synthetic sound signals derived from a single original one or to carry out a morphing between two key sounds. It can also be used to make a decision on source separation by a proper sorting and grouping of temporal functions into coherent subsets.***We plan to put in place a more general and higher-level description of time-varying parameters of the partials of polyphonic signals, and develop complementary analyses techniques. We also hope to provide better strategies for audio source separation that will benefit from prior knowledge of the underlying structure of sound signals, particularly as regards the phase. Finally, the extension of the analysis/synthesis approach to some classes of non-linear-systems will contribute to a more unified view of sound synthesis and sound processing and will allow for a general representation of several existing audio effects. ***Beyond the advance of knowledge and the training of highly qualified personnel, the expected significance in terms of applications is that a better analysis/synthesis procedure would lead to refined synthesis and processing methods. More specifically, this refinement could be decisive in applications where the separation of a few sound sources is useful, such as advanced remix for sound recording, audio restoration, coding, game industry, and movie sound effects. It would also help to design industrial applications which involve mixture of complex sounds such as 'environmental sounds' (rolling, balls, wind, water, and motor sounds).

该研究项目旨在通过受益于信号处理技术的最新进展来提高音频信号表示的准确性和适当性和建模。更确切地说，目标是更好地解决声音信号的双重性质，后者通常是时间瞬变和调制频率组件的混合物。这将导致声音处理，声音合成的质量更好，并将培养应用的项目，例如高质量的声源分离或音频变形。分析/合成的基本目标是通过一组控制合成结构的时间函数（控制参数）来构想相关模型来表示声学信号。这些时间函数可以在摘要中生成，也可以在分析过程中从预先录制的声音中提取。重新合成产生一个信号，听起来与原始声音相同。通过修改和替换控制参数，该分析/合成方案可以提供非常精致和精确的声音材料处理。例如，它可能允许一个人产生一个由单个原始声音衍生而来的合成声信号，或者在两个关键声音之间进行变形。它还可以用来通过将时间函数的适当分类和分组到连贯的子集中来决定源分离。我们还希望为音频源分离提供更好的策略，这些策略将受益于声音信号的潜在结构的先验知识，尤其是关于阶段。最后，将分析/合成方法扩展到某些类非线性系统的类别将有助于更统一的声音综合和声音处理，并允许对几种现有音频效应的一般表示。 ***除了知识的进步和对高素质人员的培训之外，在应用方面的预期意义是，更好的分析/合成程序将导致精致的综合和处理方法。更具体地说，这种改进可能在某些声音源分开的应用中是决定性的，例如用于声音录制，音频恢复，编码，游戏行业和电影声音效果的高级混音。这也将有助于设计涉及复杂声音（例如“环境声音”）（滚动，球，风，水和运动声音）的工业应用。