Switched split vector quantisation of line spectral frequencies for wideband speech coding

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Title Switched split vector quantisation of line spectral frequencies for wideband speech coding
Author So, Stephen; Paliwal, Kuldip Kumar
Publication Title Proceedings of the 9th European Conference on Speech Communication and Technology
Editor Luís Oliveira
Year Published 2005
Place of publication Lisbon, Portugal
Publisher International Speech Communication Association (ISCA)
Abstract In this paper, we investigate the use of the switched split vector quantiser (SSVQ) for coding short-term spectral envelope information for wideband speech coding. The SSVQ is the hybrid of a switch vector quantiser and split vector quantiser, which has been shown in previous studies to be more efficient, in terms of rate-distortion, as well as possessing low computational complexity, than the split vector quantiser. In our experiments, the SSVQ is used to quantise line spectral frequencies from the TIMIT database and its spectral distortion performance is compared with the split vector quantiser, the split-multistage vector quantiser (S-MSVQ) with MA predictor from the AMR-WB speech coder (ITU-T G.722.2), and PDF-optimised scalar quantisers. We show the SSVQ, which is a memoryless scheme, to achieve comparable spectral distortion to the S-MSVQ with MA predictor at 46 bits/frame. The five-part SSVQ requires 42 bits/frame and 17.7 kflops/frame for transparent coding, compared with 46 bits/frame and 40.96 kflops/frame for the five-part split vector quantiser.
Peer Reviewed Yes
Published Yes
Conference name 9th European Conference on Speech Communication and Technology
Location Lisbon, Portugal
Date From 2005-09-04
Date To 2005-09-08
URI http://hdl.handle.net/10072/2672
Date Accessioned 2006-02-22
Date Available 2007-03-21T21:26:48Z
Language en_AU
Research Centre Institute for Integrated and Intelligent Systems
Faculty Faculty of Engineering and Information Technology
Subject Signal Processing
Publication Type Conference Publications (Full Written Paper - Refereed)
Publication Type Code e1

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