Rate-distortion optimal time-segmentation and redundancy selection for VoIP

CA Rodbro, J Jensen, R Heusdens

Research output: Contribution to journalArticleScientificpeer-review

3 Citations (Scopus)

Abstract

In this paper, novel techniques for packet loss robust speech coding are proposed. By exploiting knowledge of the receiving end packet loss concealment algorithm, an existing rate-distortion optimal time-segmentation algorithm is extended to taking packet losses into account. To increase robustness in highly nonstationary signals, the technique is complemented by a redundancy selection scheme. A jointly optimal approach ensures that the complementarity between time-segmentation and redundancies is fully exploited. The performance of the methods is investigated through Monte Carlo simulations under various conditions, such as rate, packet loss probability, and algorithmic delay. Finally, subjective listening tests demonstrate perceptual improvements as compared to conventional adaptive time-segmentation not taking packet losses into account.
Original languageUndefined/Unknown
Pages (from-to)752-763
Number of pages12
JournalIEEE Transactions on Speech and Audio Processing
Volume14
Issue number3
Publication statusPublished - 2006

Keywords

  • Wiskunde en Informatica
  • Techniek
  • technische Wiskunde en Informatica
  • academic journal papers
  • CWTS 0.75 <= JFIS < 2.00

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