Robust speech quality enhancement method against background noise and packet loss at voice-over-IP receiver

Gee Yeun Kim; Hyoung-Gook Kim

doi:10.7776/ASK.2018.37.6.512

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2018 Vol.37, Issue 6 Preview Page Next Page

Research Article

Robust speech quality enhancement method against background noise and packet loss at voice-over-IP receiver 배경잡음 및 패킷손실에 강인한 voice-over-IP 수신단 기반 음질향상 기법

30 November 2018. pp. 512-517

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Abstract

Improving voice quality is a major concern in telecommunications. In this paper, we propose a robust speech quality enhancement against background noise and packet loss at VoIP (Voice-over-IP) receiver. The proposed method combines network jitter estimation based on hybrid Markov chain, adaptive playout scheduling using the estimated jitter, and speech enhancement based on restoration of amplitude and phase to enhance the quality of the speech signal arriving at the VoIP receiver over IP network. The experimental results show that the proposed method removes the background noise added to the speech signal before encoding at the sender side and provides the enhanced speech quality in an unstable network environment.

Keywords

VoIP (Voice-over-IP)

Jitter estimation

Adaptive playout scheduling

Packet loss concealment

Speech enhancement

음성 품질의 향상은 통신 분야의 주요 관심사이다. 본 논문에서는 VoIP(Voice-over-IP) 수신부에서의 배경잡음 및 패킷손실에 강인한 음질향상 방식을 제안한다. 제안된 방식에서는 하이브리드 마르코프 체인 기반 네트워크 지터추정, 추정된 지터를 이용한 적응적 플레이아웃 스케줄링, 그리고 진폭 및 위상 복원 기반의 음성 향상 방식 등을 결합하여 IP 네트워크를 통해 VoIP 수신부에 도착하는 음성신호의 품질을 향상시킨다. 실험결과는 제안된 방식이 송신부의 인코딩 전에 음성신호에 추가된 잡음을 제거하고 불안정한 네트워크 환경에서 양질의 음성을 제공하는 것을 확인할 수 있다.

키워드

음성인터넷 프로토콜

지터추정

적응적 플레이아웃 스케줄링

패킷손실 은닉

음성 향상

References

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Information

Publisher :The Acoustical Society of Korea
Publisher(Ko) :한국음향학회
Journal Title :The Journal of the Acoustical Society of Korea
Journal Title(Ko) :한국음향학회지
Volume : 37
No :6
Pages :512-517
Received Date : 2018-09-18
Revised Date : 2018-11-05
Accepted Date : 2018-11-22
DOI :https://doi.org/10.7776/ASK.2018.37.6.512

The Journal of the Acoustical Society of KoreaISSN:1225-4428(Print) 2287-3775(Online)한국음향학회

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