Quality improvement of low-bit-rate noisy speech using the subspace method

被引：0
|
作者：
El-Mahallawy, MS [1 ]
Fakhr, W [1 ]
Hamdy, N [1 ]
机构：
[1] Arab Acad Sci & Technol, Elect & Commun Dept, Alexandria, Egypt
来源：
2002 IEEE PROCEEDINGS OF THE NINETEENTH NATIONAL RADIO SCIENCE CONFERENCE, VOLS 1 AND 2 | 2002年
关键词：
D O I：
10.1109/NRSC.2002.1022627
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
Additive noise presents a particularly difficult problem for linear predictive-based speech coding (LPC) systems operating at sampling rates up to 4.8 kb/s. In this paper, the performance of cascade signal-subspace-based speech enhancement algorithm/ Code Excited Linear Predictive (CELP) coding system. is studied and Compared with the conventional cascade spectral-subtraction-based speech enhancement of algorithm/ CELP system. Both systems have been tested under the same conditions, 1, e. the same type of noise (white noise) and the same signal-to-noise-ratios. An LPC-based objective test is used for the evaluation of both systems. Based on this test, it is shown that the signal-subspace-based speech enhancement algorithm outperforms the spectral-subtraction-based speech enhancement algorithm such that it could be recommended as a preprocessor for cry LPC speech coding system.
引用
收藏
页码：230 / 237
页数：8
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