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http://dx.doi.org/10.7776/ASK.2010.29.1.034

The Performance Improvement of G.729 PLC in Situation of Consecutive Frame Loss  

Hong, Seong-Hoon (숭실대학교 정보통신공학과)
Kim, Jin-Woo (숭실대학교 정보통신공학과)
Bae, Myung-Jin (숭실대학교 정보통신공학과)
Publication Information
The Journal of the Acoustical Society of Korea / v.29, no.1, 2010 , pp. 34-40 More about this Journal
Abstract
As internet spread widely, various service which use the internet have been provided. One of the service is a internet phone. Its usage is increasing by the advantage of cost. But it has a falling off in quality of speech. because it use packet switching method while existing telephone use circuit switching method. Although vocoder use PLC (Packet Loss Concealment) algorithm, it has a weakness of continuous packet loss. In this paper, we propose methods to improve a lowering in quality of speech under continuous loss of packet by using PLC algorithm used in advanced G.729 and G.711. The proposed methods are LP (Linear Prediction) parameter interpolation, excitation signal reconstruction and excitation signal gain reconstruction. As a result, the proposed method shows superior performance about 11%.
Keywords
G.729 PLC; VoIP; Packet Loss Improvement; LP Parameter Interpolation; Excitation Restoration;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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