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Volume 27 Issue 4
Apr.  2005
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Wang Lan-mei, Shui Peng-lang, Liao Gui-sheng, Wang Gui-bao. Design of Two-Channel Signal-Adapted FIR Filterbanks without Perfect Reconstruction Constraints[J]. Journal of Electronics & Information Technology, 2005, 27(4): 570-573.
Citation: Wang Lan-mei, Shui Peng-lang, Liao Gui-sheng, Wang Gui-bao. Design of Two-Channel Signal-Adapted FIR Filterbanks without Perfect Reconstruction Constraints[J]. Journal of Electronics & Information Technology, 2005, 27(4): 570-573.

Design of Two-Channel Signal-Adapted FIR Filterbanks without Perfect Reconstruction Constraints

  • Received Date: 2003-11-14
  • Rev Recd Date: 2004-06-22
  • Publish Date: 2005-04-19
  • This paper investigates the time-domain design method of two-channel signal-adapted FIR alias-free filterbanks without Perfect Reconstruction (PR) constraints. For subband coders based on filterbanks without PR constraints, the total distortion is composed of two parts: the systemic distortion and quantization distortion. For a given total bit budget, the minimization of the total distortion is an unconstrained nonlinear programming. Due to its high nonlinearity, the design results greatly depend on selection of initial filterbanks. Two approaches to select the initial filterbanks, the associated algorithm and designs of several examples are given in this paper. The obtained signal-adapted filterbanks achieve larger subband coding gains than the existing methods, which verifies our method is effective.
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