ISCA Archive Interspeech 2005
ISCA Archive Interspeech 2005

A pitch-synchronous pitch-cycle modification method for designing a hybrid i-MELP/waveform-matching speech coder

Ali Erdem Ertan, Thomas P. Barnwell III

In this paper, we introduce a new approach to solve encoding method switching problems in a parametric/waveform-matching hybrid coder. This method only requires modification of the waveform-matching coder's target signal. For this purpose, we introduce a new pitch-synchronous cycle length modification method using the constant pitch transformation (CPT) and a frequency domain zero-phase equalization filter. An experimental I-MELP/PCM coder is used to explore the largest achievable quality improvement over a MELP coder. Test results show that encoding transitions with waveform-encoding techniques improves the quality over a fully parametric coder.


doi: 10.21437/Interspeech.2005-812

Cite as: Ertan, A.E., Barnwell III, T.P. (2005) A pitch-synchronous pitch-cycle modification method for designing a hybrid i-MELP/waveform-matching speech coder. Proc. Interspeech 2005, 2725-2728, doi: 10.21437/Interspeech.2005-812

@inproceedings{ertan05_interspeech,
  author={Ali Erdem Ertan and Thomas P. {Barnwell III}},
  title={{A pitch-synchronous pitch-cycle modification method for designing a hybrid i-MELP/waveform-matching speech coder}},
  year=2005,
  booktitle={Proc. Interspeech 2005},
  pages={2725--2728},
  doi={10.21437/Interspeech.2005-812}
}