Fast codeword search technique for the encoding of variable-rate vector quantisers

W. J. Hwang*, S. S. Jeng, M. R. Leou

*此作品的通信作者

研究成果: 雜誌貢獻期刊論文同行評審

5 引文 斯高帕斯(Scopus)

摘要

The authors present a fast search algorithm for the encoding of variable-rate vector quantisers (VQs). The optimal encoder for the variable-rate full-search VQs considers both the squared distance and channel index length for the search of codewords. Therefore, the existing fast search algorithms for the fixed-rate full-search VQs might not be able to effectively reduce the computational complexities for the variable-rate VQs. An algorithm is presented which solves this problem using a two-stage search process. A large number of undesired codewords are removed at the first stage of the search with a small computational overhead. At the second stage, the optimal codeword are searched among the remaining codewords using the partial distance search technique in the transform domain. Simulation results show that the algorithm is more effective than other fast search algorithms for the variable-rate VQs.

原文英語
頁(從 - 到)103-108
頁數6
期刊IEE Proceedings: Vision, Image and Signal Processing
145
發行號2
DOIs
出版狀態已發佈 - 1998 一月 1

ASJC Scopus subject areas

  • 訊號處理
  • 電氣與電子工程

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