The Performance Improvement of G.729 PLC by Using RTP Extension Header Data in Consecutive Frame Loss Condition 


Vol. 34,  No. 10, pp. 317-324, Oct.  2009


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  Abstract

It has a falling off in speech quality, especially when consecutive packet loss occurs, even if a vocoder implemented in the packet network has its own packet loss concealment (PLC) algorithm. PLC algorithm is divided into transmitter and receiver algorithm. Algorithm in the transmitter gives superior quality by additional information. however, it is impossible to provide mutual compatibility and it occurs extra delay and transmission rate. The method applied in the receiver does not require additional delay or information. because it is based on received data. However, it sets limits to improve the speech quality. In this paper, we proposed a new method that puts extra information for PLC in a part of Extension Header Data which not used in RTP Header. It can solve the problem in method based on a receiver and advance speech quality. Extra information, 16 bits each frame for G.729 PLC, is allocated for MA filter index in LP synthesis, excitation signal, excitation signal gain and residual gain reconstruction. It is because a transmitter sends speech data each 20㎳ when it transfers RTP payload. As a result, the proposed method shows superior performance about 12.5%.

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  Cite this article

[IEEE Style]

S. Hong, S. Choi, M. Bae, "The Performance Improvement of G.729 PLC by Using RTP Extension Header Data in Consecutive Frame Loss Condition," The Journal of Korean Institute of Communications and Information Sciences, vol. 34, no. 10, pp. 317-324, 2009. DOI: .

[ACM Style]

Seong-Hoon Hong, Seong-Young Choi, and Myung-Jin Bae. 2009. The Performance Improvement of G.729 PLC by Using RTP Extension Header Data in Consecutive Frame Loss Condition. The Journal of Korean Institute of Communications and Information Sciences, 34, 10, (2009), 317-324. DOI: .

[KICS Style]

Seong-Hoon Hong, Seong-Young Choi, Myung-Jin Bae, "The Performance Improvement of G.729 PLC by Using RTP Extension Header Data in Consecutive Frame Loss Condition," The Journal of Korean Institute of Communications and Information Sciences, vol. 34, no. 10, pp. 317-324, 10. 2009.

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pISSN : 1226 - 4717
eISSN : 2287 - 3880