Enhanced waveform interpolative coding at low bit-rate

@article{Gottesman2001EnhancedWI,
  title={Enhanced waveform interpolative coding at low bit-rate},
  author={Oded Gottesman and Allen Gersho},
  journal={IEEE Trans. Speech Audio Process.},
  year={2001},
  volume={9},
  pages={786-798}
}
This paper presents a high quality enhanced waveform interpolative (EWI) speech coder at low bit-rate. The system incorporates novel features such as optimization of the slowly evolving waveform (SEW) for interpolation, analysis-by-synthesis (AbS) vector quantization (VQ) of the SEW dispersion phase, dual-predictive AbS quantization of the SEW, efficient parameterization of the rapidly-evolving waveform (REW) magnitude, and VQ of the REW parameter, a special pitch search for transitions, and… 
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27 Citations
Background Citations
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Methods Citations
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27 Citations

Speech coding at very low bit-rates for mobile communication

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  • Computer Science
    9th Asia-Pacific Conference on Communications (IEEE Cat. No.03EX732)
  • 2003
It is concluded that speech coding low bit-rates especially the EWI coder has enormous vistas in future 4G mobile systems, Internet telephony, LEO systems, etc.

Low bit-rate voice compression based on frequency domain interpolative techniques

This paper presents an approach, referred to as frequency domain interpolation (FDI), for achieving high-quality speech at low bit-rates (4 kb/s and below) within reasonable complexity and delay and confirms that FDI techniques have the potential for delivering high- quality speech atLow bit- rates in a cost-effective manner.

New ideas for waveform interpolation

  • I. Druker
  • Computer Science, Geology
    The 22nd Convention on Electrical and Electronics Engineers in Israel, 2002.
  • 2002
A new efficient algorithm for characteristic waveform (CW) alignment is proposed and the standard linear-filtering decomposition of the CW is augmented into Slowly Evolving Waveform (SEW) and Rapidly EvolvingWaveform (REW) by a voicing-dependent factor to reduce memory requirements and computation without significant degradation of the speech quality.

A High Quality Speech Coder at 600 bps

A vocoder to obtain high quality synthetic speech at 600 bps is presented, based on a sinusoidally excited linear prediction model which extracts few coding parameters, and three consecutive frames are grouped into a superframe and jointly vector quantization is used to obtained high coding efficiency.

Novel low-band phase representation for low bit-rate speech coding

A novel distortion measure for the low-band speech signal that takes phase information into consideration, with no increase in the bit-rate is introduced.

A Low-complexity Improved WI Speech Coding at 2 kbps

A low-complexity improved waveform interpolation speech coder at 2kbps is proposed and has greatly reduced the computational complexity and improved the reconstructed speech quality by using various techniques, including FFT, cubic B-spline interpolation, nonlinear frequency resolution and so on.

Low‐Bit‐Rate Speech Coding

This article is focused on speech coding methods for achieving communication quality speech at bit rates of 4 kbit/s and lower, based on an all-pole model of the vocal tract.

Low bit-rate speech coder based on a long-term model

  • O. LevD. Malah
  • Computer Science
    The 22nd Convention on Electrical and Electronics Engineers in Israel, 2002.
  • 2002
A low bit rate speech coder based on a long-term model for voiced speech, and on the WI coder, where the spectral shaping in the proposed coder is based on WI.

New Speech Encoding Algorithms for Ultra Low Bit Rate at 600/300 Bps

  • Jian CongSuo Cong
  • Computer Science
    2006 IEEE International Conference on Acoustics Speech and Signal Processing Proceedings
  • 2006
A new clustering model of speech characteristics is proposed to process effectively the parameters of large super-frames and algorithms for ultra low bit rate speech encoding at 600 bps and 300 bps for applications in acoustically harsh environments are presented.

An Approach to the Decoder Complexity Reduction in Waveform Interpolation Speech Coding

An approach to the complexity reduction in WI speech decoder, which is used for compressing the database of the TTS system, is described, able to reduce the complexity by removing the realignment process from the decoder procedure in WI.

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This paper presents a high quality enhanced waveform interpolative (EWI) speech coder at 2.8 kbps. The system incorporates novel features such as: dual-predictive analysis-by-synthesis (AbS)…

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This paper presents an enhanced waveform interpolative (EWI) speech coder at 4 kbps. The system incorporates novel features such as analysis-by-synthesis (AbS) vector-quantization (VQ) of the…

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