Missing packet recovery techniques for low-bit-rate coded speech

Suzuki, Junji; Taka, M.

doi:10.1109/49.32334

Cited by 57 publications

(24 citation statements)

References 7 publications

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“…Another PLC algorithm that requires special transmission format from the encoder and also a multipriority discarding scheme from the network has been proposed by Suzuki and Taka [6]. Their algorithm is based on sending the most significant bits of the PCM samples in high-priority packets and the least significant bits in low-priority packets.…”

Section: Introductionmentioning

confidence: 99%

Linear prediction based packet loss concealment algorithm for PCM coded speech

Gunduzhan

Momtahan

2001

IEEE Trans. Speech Audio Process.

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One of the well-known problems in real-time packetized voice applications is the degradation in voice quality due to delayed or misrouted packets. When a voice packet does not arrive at the receiver on time, the receiver needs a packet loss concealment algorithm to generate a signal instead of the missing voice segment. In this paper we describe a high performance packet loss concealment algorithm for pulse code modulation (PCM) coded speech. The algorithm extracts the residual signal of the previously received speech by linear prediction analysis, uses periodic replication to generate an approximation for the excitation signal of missing speech, and generates synthesized speech using this excitation. It also performs overlap-and-adding and scaling operations to smooth out transitions at frame boundaries. The new algorithm was compared to other algorithms by subjective quality tests, and was found to be better than the existing algorithms in some cases.

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Section: Introductionmentioning

confidence: 99%

Linear prediction based packet loss concealment algorithm for PCM coded speech

Gunduzhan

Momtahan

2001

IEEE Trans. Speech Audio Process.

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“…Instead, receiver-based methods are preferred for audio IP-based transmissions. Typical receiver-based error concealment methods for audio/music applications include white noise generation or zeros padding [8], pattern matching using small segments of samples immediately before or after lost packets [9] - [10] or repeating the last successfully received packet [11]. Moreover, a number of previously published packet concealment techniques [12] - [13] employ time-based windowing functions for improving the audibility of the packet inserted, while other additionally use interleaving techniques for enhancing the concealment performance under the presence of burst packet losses [14].…”

Section: Error Concealment Overviewmentioning

confidence: 99%

Stochastic Packet Reconstruction for Subjectively Improved Audio Delivery over WLANs

Floros¹,

Avlonitis²,

Vlamos³

2007

Proceedings of the 3rd International ICST Conference on Mobile Multimedia Communications

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Real time digital audio delivery over Wireless Local Area Networks (WLANs) represents an attractive, flexible and cost effective framework for realizing high-quality, multichannel home audio applications. However, the unreliable nature of WLANs IP link frequently imposes significant playback quality degradation, due to delay or permanent loss of a number of transmitted digital audio packets. In this paper, a novel packet error concealment technique is presented, based on the spectral reconstruction of the statistical equivalent of a previously successfully received audio data packet. It is shown that the proposed data reconstruction scheme outperforms previously published error concealment strategies, in both terms of objective and perceptual criteria.

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“…Early PLC algorithms recover from packet at the receiver stage by inserting a silence, or noise, or previous packet [12]. Furthermore, a pitch waveform replication [13] and overlapadd interpolation [14] techniques have been developed as receiver-based PLC schemes.…”

Section: Introductionmentioning

confidence: 99%

Novel adaptive muting technique for packet loss concealment of ITU-T G.722 using optimized parametric shaping functions

Lee

Chang

2016

J AUDIO SPEECH MUSIC PROC.

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Adaptive muting method using an optimized parametric shaping function as a part of the ITU-T G.722 Appendix IV packet loss concealment algorithm is proposed. The packet loss concealment algorithm incorporating an adaptive muting scheme is known to prevent the generation of unpleasant sounds during packet loss concealment. However, original muting uses a piece-wise linear muting curve according to packet errors so that our muting approach uses non-linear parametric shaping functions including sigmoid and raised-cosine. Training is substantially performed to determine the parameters of the two shaping functions in terms of objective speech quality measures, and optimal parameters are finally selected by subjective speech quality. Through extensive experiments, this proposed muting technique turns out to improve the performance of the reference muting mechanisms in the packet loss concealment algorithm of the G.722 Appendix IV under various experimental conditions.

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Missing packet recovery techniques for low-bit-rate coded speech

Cited by 57 publications

References 7 publications

Linear prediction based packet loss concealment algorithm for PCM coded speech

Linear prediction based packet loss concealment algorithm for PCM coded speech

Stochastic Packet Reconstruction for Subjectively Improved Audio Delivery over WLANs

Novel adaptive muting technique for packet loss concealment of ITU-T G.722 using optimized parametric shaping functions

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