Source signal based rate adaptation for GSM AMR speech codec

@article{Makinen2004SourceSB,
  title={Source signal based rate adaptation for GSM AMR speech codec},
  author={J. Makinen and J. Vainio},
  journal={International Conference on Information Technology: Coding and Computing, 2004. Proceedings. ITCC 2004.},
  year={2004},
  volume={2},
  pages={308-313 Vol.2}
}
Adaptive multirate (AMR) codec was standardised for GSM in 1999. AMR offers substantial improvement over previous GSM speech codecs in error robustness by adapting speech and channel coding depending on channel conditions. However, current standard do not exploit the multirate capability of AMR codec in source signal based adaptation that would optimise the average bit-rate vs. quality trade-off. This paper presents a source signal based rate adaptation algorithm for AMR codec in GSM system… CONTINUE READING

References

Publications referenced by this paper.

Performance of adaptive multi-rate (AMR) voice in GSM and WCDMA

  • H. Holma, J. Melero, J. Vainio, T. Halonen, J. Makinen
  • Proc VTC 2003-Spring, Jeju, Korea, 22-25 April
  • 2003
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