Improvement of Overlapped Codebook Search in QCELP


The KIPS Transactions:PartC, Vol. 8, No. 1, pp. 105-112, Feb. 2001
10.3745/KIPSTC.2001.8.1.105,   PDF Download:

Abstract

In this paper, we present the advanced QCELP codebook search improving the qualification of speech, which can make QCELP vocoder used in noise robust system. While conventional QCELP usually searches stochastic codebook once, we can find that two times search is the most suitable for improving the quality of speech after we did 2 ~ 5 times search. Consequently, the advanced QCELP vocoder represents excitation signal in detail using two times precise quantization and so improve the qualification of speech. In our experiment, we use the speeches collected from circumstance (such as lecture room, house, street, laboratory etc.) without regarding noise as input data and measure the speech qualification using SNR, segSNR. As the result of the experiment, we find that the advanced QCELP makes SNR and segSNR improved by 38.35% and 65.51% respectively compared with conventional QCELP.


Statistics
Show / Hide Statistics

Statistics (Cumulative Counts from September 1st, 2017)
Multiple requests among the same browser session are counted as one view.
If you mouse over a chart, the values of data points will be shown.


Cite this article
[IEEE Style]
K. C. Park, S. J. Han, J. H. Lee, "Improvement of Overlapped Codebook Search in QCELP," The KIPS Transactions:PartC, vol. 8, no. 1, pp. 105-112, 2001. DOI: 10.3745/KIPSTC.2001.8.1.105.

[ACM Style]
Kwang Cheol Park, Seung Jin Han, and Jung Hyun Lee. 2001. Improvement of Overlapped Codebook Search in QCELP. The KIPS Transactions:PartC, 8, 1, (2001), 105-112. DOI: 10.3745/KIPSTC.2001.8.1.105.