JOURNAL OF SHANDONG UNIVERSITY(NATURAL SCIENCE) ›› 2017, Vol. 52 ›› Issue (3): 82-90.doi: 10.6040/j.issn.1671-9352.2.2016.209

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A packet loss concealment scheme based on HMM for mobile audio coding

XIANG Kai1,2, CHEN Shi-hong2*   

  1. 1. School of Information Management and Statistics, Hubei University of Economics, Wuhan 430205, Hubei, China;
    2. School of Computing, Wuhan University, Wuhan 430072, Hubei, China
  • Received:2016-08-18 Online:2017-03-20 Published:2017-03-20

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Abstract: In order to deal with the problem of unexpected large number of continuous packet loss scenarios occur in poor quality of mobile voice transmission and audio communication service, a packet loss concealment scheme based on HMM for ACELP codec is proposed. The scheme utilizes HMM to decide the appropriate packet loss concealment strategy according to the statistical change of larger range of context in audio signal. When a packet loss occurs, the estimation is involved by recovery through status and probability density function. The experiment results show that the objective listening test PESQ score achieves an increase of 0.33 points and subjective listening test CMOS score achieves an increase of 0.05 points when compared with the original scheme employed in AVS-P10 standard.

Key words: HMM, audio signal processing, mobile audio coding, packet loss concealment

CLC Number: 

  • TN912.3
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