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Generalised lapped orthogonal transforms

Generalised lapped orthogonal transforms

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Published

A class of linear-phase paraunitary filter banks is developed, possessing fast implementation algorithms based on the discrete cosine transform. In this formulation, the lapped orthogonal transform is a particular case which was extended to accommodate the overlap of any number of blocks. Optimised design examples are presented.

Inspec keywords: image coding; filtering and prediction theory; discrete cosine transforms; frequency response

Other keywords: transform coding gain; filter frequency response; lapped orthogonal transform; discrete cosine transform; fast implementation algorithms; optimised design examples; linear-phase paraunitary filter banks; image compression; GENLOT

Subjects: Integral transforms; Integral transforms; Pattern recognition; Signal processing and detection; Optical information, image and video signal processing; Information theory; Codes

References

    1. 1)
      • P.P. Vaidyanathan . (1993) Multirate systems and filterbanks.
    2. 2)
      • H.S. Malvar , D.H. Staelin . The LOT: Transform coding without blocking effects. IEEE Trans. , 553 - 559
    3. 3)
      • K.R. Rao , P. Yip . (1990) Discrete cosine transform: Algorithms, advantages, applications.
    4. 4)
      • H. Malvar . (1992) Signal processing with lapped transforms.
    5. 5)
      • Soman, A.K., Vaidyanathan, P.P., Nguyen, T.Q.: `Linear-phase orthonormal filter banks', Proc. IEEE Int. Conf. on Acoust., Speech, Signal Processing, April 1993, III, Minneapolis, MN, p. 209–212.
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