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A low-complexity waveform interpolation coder

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4 Author(s)
Kleijn, W.B. ; Dept. of Speech Coding Res., AT&T Bell Labs., Murray Hill, NJ, USA ; Shoham, Y. ; Sen, D. ; Hagen, R.

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 device and on an average workstation (the latter using non-optimized compiled C source code). The new coder also contains a number of new features which improve the quality of the reconstructed speech signal

Published in:

Acoustics, Speech, and Signal Processing, 1996. ICASSP-96. Conference Proceedings., 1996 IEEE International Conference on  (Volume:1 )

Date of Conference:

7-10 May 1996