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dc.titleNew filtering scheme for split-band voice coding
dc.contributor.authorLim, Y.C.
dc.contributor.authorKoh, S.N.
dc.contributor.authorKo, C.C.
dc.identifier.citationLim, Y.C.,Koh, S.N.,Ko, C.C. (1989-03). New filtering scheme for split-band voice coding. Journal of Electrical and Electronics Engineering, Australia 9 (1-2) : 27-34. ScholarBank@NUS Repository.
dc.description.abstractThis paper presents a new filtering scheme for spliting speech signals into sub-bands which results in no aliasing problem when the sub-band signals are sub-sampled and recombined. The high-pass and low-pass filters are an odd-length complementary linear phase filter pair. As a consequence, the high-pass output can be obtained by subtracting the low-pass filter output from the appropriately delayed input. This produces a factor-of-two reduction in the computation load when compared to the conventional even-length quadrature mirror filter. Another factor-of-two saving in computation load can be gained by using half-band low-pass filters whose every other coefficient is zero. Furthermore, the filters can be designed using well-known minimax optimisation techniques such as the Remez exchange algorithm and integer programming.
dc.contributor.departmentELECTRICAL ENGINEERING
dc.description.sourcetitleJournal of Electrical and Electronics Engineering, Australia
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