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  • 标题:An Adaptive Orthogonal M-Split Initialization Method for VQ Codebook Generation
  • 本地全文:下载
  • 作者:Weijun He ; Qianhua He ; Jichen Yang
  • 期刊名称:International Journal of Signal Processing, Image Processing and Pattern Recognition
  • 印刷版ISSN:2005-4254
  • 出版年度:2016
  • 卷号:9
  • 期号:8
  • 页码:1-10
  • 出版社:SERSC
  • 摘要:Linde–Buzo–Gray (LBG) algorithm is a universal method to design codebook in vector quantization(VQ). This paper proposed an adaptive orthogonal M-split initialization method to improve the computational efficiency of LBG algorithm. The method splits one code word into 2, 4 or 5 new code words with adaptive split coefficient vectors and set the increment to be orthogonal in 4-split and 5-split situations, aiming at decreasing the iterations of the following clustering. Experiment is conducted on both TIMIT and RASC863 speech database, which shows that the proposed algorithm provides a reduction of 18%~45% in designing codebook in size of 64~2048 with almost equal VQ performance, compared with the universal codebook generation algorithm.
  • 关键词:LBG; algorithm; vector quantization; codebook design; pattern recognition; ;low bit rate speech coding
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