Packet loss concealment using piggybacking for speech over IP network services

This paper addresses a packet loss concealment method (PLC) based on piggybacking to improve speech quality degradation caused by packet losses for code excited linear predictive (CELP) type coders. We applied our proposed scheme to the standard ITU-T G.729 Conjugate-Structure Algebraic CELP (CS-CELP) speech coder to evaluate its performance. The average spectral distortion (Avg. SD), the perceptual evaluation of speech quality (PESQ) and enhanced modified bark spectral distortion (EMBSD) tests under a variety of packet loss rates prove that the proposed PLC based piggybacking is better than the concealment method embedded in the ITU-T G.729 for speakers (female and male). The performance measures confirm that our PLC method based piggybacking is superior than the one embedded in the standard ITU-T G.729.