Optimizing frame analysis with non-integrer shift for sampling mismatch compensation of long recording

Shigeki Miyabe, Nobutaka Ono, Shoji Makino

Research output: Chapter in Book/Report/Conference proceedingConference contribution

10 Citations (Scopus)

Abstract

This paper proposes a blind synchronization of ad-hoc microphone array in the short-time Fourier transform (STFT) domain with the optimized frame analysis centered at non-integer discrete time. We show that the drift caused by sampling frequency mismatch of asynchronous observation channels can be disregarded in a short interval. Utilizing this property, the sampling frequency mismatch and the recording start offset are estimated roughly by finding two pairs of the short intervals corresponding to the same continuous time. Using the estimate, STFT analysis is synchronized roughly between channels with optimized frame central. Since the optimized frame central is generally non-integer, we approximate the frame analysis by the linear phase filtering of the frame centered at the nearest integer sample. Maximum likelihood estimation refines the compensation of sampling frequency mismatch.

Original languageEnglish
Title of host publication2013 IEEE Workshop on Applications of Signal Processing to Audio and Acoustics, WASPAA 2013
DOIs
Publication statusPublished - 2013
Externally publishedYes
Event2013 14th IEEE Workshop on Applications of Signal Processing to Audio and Acoustics, WASPAA 2013 - New Paltz, NY, United States
Duration: 2013 Oct 202013 Oct 23

Publication series

NameIEEE Workshop on Applications of Signal Processing to Audio and Acoustics

Other

Other2013 14th IEEE Workshop on Applications of Signal Processing to Audio and Acoustics, WASPAA 2013
CountryUnited States
CityNew Paltz, NY
Period13/10/2013/10/23

Keywords

  • Ad-hoc microphone array
  • blind source separation
  • maximum likelihood estimation
  • sampling frequency

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Computer Science Applications

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