Name
Abstract | ||
|---|---|---|
This paper presents a method for designing low-delay nonuniform pseudo quadrature mirror filter (QMF) banks. This method is motivated by the work of Li, Nguyen, and Tantaratana, in which the nonuniform filter bank is realized by combining an appropriate number of adjacent sub-bands of a uniform pseudo-QMF bank. In prior work, the prototype filter of the uniform pseudo-QMF bank was constrained to have linear phase and the overall delay associated with the filter bank was often unacceptably large for filter banks with a large number of sub-bands. This paper proposes a pseudo-QMF filter bank design technique that significantly reduces the delay by relaxing the linear phase constraints. An example in which an oversampled critical-band nonuniform filter bank is designed and applied to a two-state modeling speech enhancement system is presented in this paper. Comparison of the performance of this system to competing methods employing tree-structured, linear phase multiresolution analysis indicates that the approach described in this paper strikes a good balance between system performance and low delay |
Year | DOI | Venue |
|---|---|---|
2007 | 10.1109/TSP.2007.892707 | IEEE Transactions on Signal Processing |
Keywords | Field | DocType |
filter bank,low-delay nonuniform filter bank design,prototype filter,linear phase constraints,low-delay nonuniform pseudo-qmf banks,uniform pseudo-qmf bank,multiresolution analysis,oversampled critical-band nonuniform filter,trees (mathematics),mirror filter,quadrature mirror filter banks,pseudo-qmf filter bank design,linear phase multiresolution analysis,channel bank filters,tree-structured analysis,speech enhancement,linear phase constraint,oversampled critical-band nonuniform filter bank,nonuniform filter bank,linear phase,quadrature mirror filter,digital filters,frequency,system performance,design methodology,tree structure,wavelet packets,prototypes | Speech enhancement,Linear phase,Root-raised-cosine filter,Quadrature mirror filter,Oversampling,Prototype filter,Control theory,Filter bank,Mathematics,Filter design | Journal |
Volume | Issue | ISSN |
55 | 5 | 1053-587X |
Citations | PageRank | References |
9 | 0.54 | 19 |
Authors | ||
3 | ||
Name | Order | Citations | PageRank |
|---|---|---|---|
| Ying Deng | 1 | 15 | 1.38 |
| V.J. Mathews | 2 | 76 | 10.24 |
| B. Farhang-Boroujeny | 3 | 553 | 46.61 |