A low-complexity waveform interpolation coder
@article{Kleijn1996ALW,
title={A low-complexity waveform interpolation coder},
author={W. Kleijn and Yair Shoham and Deep Sen and Roar Hagen},
journal={1996 IEEE International Conference on Acoustics, Speech, and Signal Processing Conference Proceedings},
year={1996},
volume={1},
pages={212-215 vol. 1}
}A recent independent survey found a 2.4 kbit/s waveform-interpolation (WI) algorithm to perform better than other state-of-the-art speech coders. However, this coder had a very high level of computational complexity. The introduction of various techniques, including a time-varying waveform sampling rate and a cubic B-spline waveform representation, has reduced the computational complexity by an order of magnitude. The new implementation allows full-duplex real-time operation on a single DSP…
43 Citations
A Low-complexity Improved WI Speech Coding at 2 kbps
- Computer Science
- 2006
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.
A 2.4kbps Multiband Characteristic Waveform Interpolation Speech Coding Algorithm
- Computer Science2009 2nd International Congress on Image and Signal Processing
- 2009
The result shows that the new algorithm can rebuild the speech high frequency harmonics perfectly and is obviously superior to the conventional CWI coder and also slightly exceeds the MELP coder.
Enhanced waveform interpolative coding at low bit-rate
- GeologyIEEE Trans. Speech Audio Process.
- 2001
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…
2 kbps-2.4 kbps low complexity interpolative vocoder
- Computer ScienceICCT'98. 1998 International Conference on Communication Technology. Proceedings (IEEE Cat. No.98EX243)
- 1998
This speech coder takes the good ideal of waveform interpolation, but adopts a different framework to simplify the system complexity and presents some important techniques such as one-frame look ahead pitch smoothing algorithm and parameter quantization.
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- Computer Science2006 8th international Conference on Signal Processing
- 2006
The improved algorithm for CW representation and CW alignment was proposed by using FFT, cubic B-spline interpolation and period extension and results show that the improved algorithm has greatly reduced the computational complexity and kept the same speech quality as original coder.
A new approach to generating Pitch Cycle Waveform (PCW) for Waveform Interpolation codec
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- 2002
Multi-prototype waveform coding using frame-by-frame analysis-by-synthesis
- Computer Science1997 IEEE International Conference on Acoustics, Speech, and Signal Processing
- 1997
In the new scheme, a frame of prototype waveforms is quantised using two sets of codebook searches, one representing the slowly evolving prototype shape and the other the rapid, noisy components, resulting in a generalised analysis-by-synthesis waveform interpolation architecture with closed-loop optimisation of all prototype waveform properties.
Enhancing waveform interpolative coding with weighted REW parametric quantization
- Computer Science2000 IEEE Workshop on Speech Coding. Proceedings. Meeting the Challenges of the New Millennium (Cat. No.00EX421)
- 2000
An efficient quantization technique for the rapidly-evolving waveforms in waveform interpolative (WI) coders that takes advantage of spectral and temporal masking and leads to improved reconstructed speech quality, most notably in mixed voiced and unvoiced speech segments.
A waveform extractor for scalable speech coding
- Computer Science2003 IEEE International Conference on Acoustics, Speech, and Signal Processing, 2003. Proceedings. (ICASSP '03).
- 2003
A waveform extractor is proposed which samples waveform cycles of the original prediction residual signal at their natural variable rate so that it can perfectly reconstruct the signal.
Low complexity speech coding at 1.2 to 2.4 kbps based on waveform interpolation
- Computer ScienceInt. J. Speech Technol.
- 1999
New approaches to low-complexity speech coding at coding rates of 1.2 and 2.4 kbps are proposed, which greatly simplify the analysis and synthesis operations to a point where low-cost two-way digital speech communication can be easily implemented on DSP or host platforms.
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