Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/72532
Title: COMPLEMENTARY FILTERING TECHNIQUE FOR SUBBAND SPEECH CODER DESIGN.
Authors: Lim, Y.C. 
Koh, S.N.
Ko, C.C. 
Issue Date: 1987
Source: Lim, Y.C.,Koh, S.N.,Ko, C.C. (1987). COMPLEMENTARY FILTERING TECHNIQUE FOR SUBBAND SPEECH CODER DESIGN.. ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings : 1625-1628. ScholarBank@NUS Repository.
Abstract: A filtering scheme for splitting speech signals into subbands which results in no aliasing problem when the subband signals are subsampled and recombined is presented. The highpass and lowpass filters are an odd-length complementary linear phase filter pair. As a consequence, the highpass filter output can be obtained by subtracting the lowpass 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 halfband lowpass filters whose every other coefficient is zero. Furthermore, the filters can be designed using well known minimax optimization techniques such as the Remez exchange algorithm and integer programming.
Source Title: ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings
URI: http://scholarbank.nus.edu.sg/handle/10635/72532
ISSN: 07367791
Appears in Collections:Staff Publications

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