Speech coding over frame relay networks

Leung, T.W.; LeBlanc, W.P.; Mahmoud, Sa.

doi:10.1109/scft.1993.762346

Cited by 10 publications

(2 citation statements)

References 2 publications

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“…Yong [5] studied four different voice packet reconstruction methods to recover the coded speech for CELP-type speech coders. Leung et al [6] considered vector linear prediction in voiced frame reconstruction in CELP coders over frame relay networks. Husain et al [7] introduced an extrapolation strategy based on speech classification for CELP coders.…”

Section: Introductionmentioning

confidence: 99%

A voicing-driven packet loss recovery algorithm for analysis-by-synthesis predictive speech coders over Internet

Wang

Yang

et al. 2001

IEEE Trans. Multimedia

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In this paper, a novel voicing-driven adaptive packet loss recovery algorithm is proposed to lessen the possible voice degradation and error propagation for analysis-by-synthesis speech coders in Internet applications. After voicing classification, we adaptively adopt random noise generation, multiresolution excitation generation, or pulse tracking procedure to recover the lost packets. By applying the algorithm to the G.723.1 coder, simulation results show that the proposed algorithm is superior to the recovery algorithm embedded in the G.723.1 standard through the subjective evaluation.

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Section: Introductionmentioning

confidence: 99%

A voicing-driven packet loss recovery algorithm for analysis-by-synthesis predictive speech coders over Internet

Wang

Yang

et al. 2001

IEEE Trans. Multimedia

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“…Concealment of lost frames based on classification and spectral extrapolation, applied to the ITU (3.728 standard, was proposed by Husain and Cuperman [5]. Leung et al extended to CELP-based coders the concept of using future as well as past information to reconstruct missing frames [6].…”

Section: Introductionmentioning

confidence: 99%

Improved frame erasure concealment for CELP-based coders

Martin

Unno

Viswanathan

2000 IEEE International Conference on Acoustics, Speech, and Signal Processing. Proceedings (Cat. No.00CH37100)

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This paper describes new techniques for concealing frame erasures for CELP-based speech coders. Two main approaches were followed: interpolative, where both past and future information are used to reconstruct the missing data, and repetition-based, where no future information is required. Key features of the repetition-based approach include improved muting, pitch delay jittering, and LPC bandwidth expansion. The interpolative approach can be employed in Voice over IP scenarios at no extra cost in terms of delay. Applied to the ITU-T (3.729 ACELP 8 kb/s speech coding standard, both interpolation-and repetitionbased techniques outperform standard concealment in informal listening tests.

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Classification and spectral extrapolation based packet reconstruction for low-delay speech coding

Husain

Cuperman

1994 IEEE GLOBECOM. Communications: The Global Bridge

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Speech coding over frame relay networks

Cited by 10 publications

References 2 publications

A voicing-driven packet loss recovery algorithm for analysis-by-synthesis predictive speech coders over Internet

A voicing-driven packet loss recovery algorithm for analysis-by-synthesis predictive speech coders over Internet

Improved frame erasure concealment for CELP-based coders

Classification and spectral extrapolation based packet reconstruction for low-delay speech coding

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