Harmonic Phase Estimation in SingleChannel Speech Enhancement Using
Phase Decomposition and SNR Information
Further Details Contact: A Vinay 9030333433, 08772261612
Email: takeoffstudentprojects@gmail.com | www.takeoffprojects.com
Abstract— In conventional single-channel speech enhancement, typically the noisy spectral
amplitude is modified while the noisy phase is used to reconstruct the enhanced signal. Several
recent attempts have shown the effectiveness of utilizing an improved spectral phase for phaseaware speech enhancement and consequently its positive impact on the perceived speech quality.
In this paper, we present a harmonic phase estimation method relying on fundamental frequency
and signal-to-noise ratio (SNR) information estimated from noisy speech. The proposed method
relies on SNR-based time-frequency smoothing of the unwrapped phase obtained from the
decomposition of the noisy phase. To incorporate the uncertainty in the estimated phase due to
unreliable voicing decision and SNR estimate, we propose a binary hypothesis test assuming
speech-present and speech-absent classes representing high and low SNRs. The effectiveness of
the proposed phase estimation method is evaluated for both phase-only enhancement of noisy
speech and in combination with an amplitude-only enhancement scheme. We show that by
enhancing the noisy phase both perceived speech quality as well as speech intelligibility are
improved as predicted by the instrumental metrics and justified by subjective listening tests.
Existing method:
The two well-known methods in this group are the short-time spectral amplitude (STSA) and the
log-spectral amplitude estimator (LSA) both proposed by Ephraim and Malah where they
commonly employ the noisy spectral phase for signal reconstruction
Proposed method:
the proposed phase estimation method is evaluated for both phase-only enhancement of noisy
speech and in combination with an amplitude-only enhancement scheme.
Merits:
enhancement of noisy speech and in combination with an amplitude
Demerits:
1. time process is very high.
Further Details Contact: A Vinay 9030333433, 08772261612
Email: takeoffstudentprojects@gmail.com | www.takeoffprojects.com
Further Details Contact: A Vinay 9030333433, 08772261612
Email: takeoffstudentprojects@gmail.com | www.takeoffprojects.com