Time–Frequency Processing: Methods and Tools

Juha Vilkamo, Tom Bäckström

Research output: Chapter in Book/Report/Conference proceedingChapterScientificpeer-review

3 Citations (Scopus)


This chapter presents an overview of the theory and practice of the tools typically needed in time-frequency processing of audio channels. It introduces a few signal processing techniques commonly used, and serves as background information for the reader. The chapter assumes understanding of basic digital signal processing techniques from the reader, which can be obtained from such basic resources as Oppenheim and Schafer or Mitra and Kaiser. It discusses the methods that utilize some kind of stochastic analysis of time-frequency domain differences between microphone signals. In the reproduction of spatial audio, the computed time-frequency-dependent parameters are typically used to control the mixing process, where in some cases decorrelation of signals is used to control the coherence between output channels. The chapter describes an optimal method to control the level of decorrelated signal energy that is utilized in some of the spatial audio methods.
Original languageEnglish
Title of host publicationParametric Time-Frequency Domain Spatial Audio
EditorsVille Pulkki, Symeon Delikaris-Manias, Archontis Politis
ISBN (Electronic)9781119252634
ISBN (Print)9781119252597
Publication statusPublished - 2017
MoE publication typeA3 Part of a book or another research book


  • digital signal processing techniques
  • spatial audio
  • stochastic analysis
  • time-frequency domain differences

Fingerprint Dive into the research topics of 'Time–Frequency Processing: Methods and Tools'. Together they form a unique fingerprint.

Cite this