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lsinfo

(To be removed) Lifting schemes information

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    lsinfo will be removed in a future release. Use disp and liftingScheme instead. For more information, see Version History.

    Syntax

    lsinfo

    Description

    lsinfo displays information about lifting schemes created with liftwave.

    Note

    liftwave is no longer recommended and will be removed in a future release. Use liftingScheme.

    example

    Examples

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    Display information about lifting schemes created with liftwave.

    lsinfo
     lsinfo Information about lifting schemes.
    A lifting scheme (LS) is a N x 3 cell array. The N-1 first
    rows of the array are "elementary lifting steps" (ELS).
    The last row gives the normalization of LS.
 
    Each ELS has the following format: 
       {type , coefficients , max_degree}
    where:
      - "type" is equal to 'p' (primal) or 'd' (dual).
      - "coefficients" is a vector C of real numbers defining
         the coefficients of a Laurent polynomial P described
         below.
      - "max_degree" is the highest degree d of the monomials
         of P.
      The Laurent polynomial P is of the form:
        P(z) = C(1)*z^d + C(2)*z^(d-1) + ... + C(m)*z^(d-m+1)
    
    So the Lifting Scheme LS is such that:
      for k = 1:N-1 , LS{k,:} is an ELS:
          LS{k,1} is the lifting "type" 'p' (primal) or 'd' (dual).
          LS{k,2} is the corresponding lifting filter.
          LS{k,3} is the highest degree of the Laurent polynomial
                  corresponding to the filter LS{k,2}.
      LS{N,1} is the primal normalization (real number).
      LS{N,2} is the dual normalization (real number).
      LS{N,3} is not used.
      Usually, the normalizations are such that LS{N,1}*LS{N,2} = 1.
 
    For example, the lifting scheme associated to the wavelet db1 is:
 
        LS = {...
              'd'         [    -1]    [0]
              'p'         [0.5000]    [0]
              [1.4142]    [0.7071]     []
             }
 
    See also displs, laurpoly.

    Documentation for lsinfo

    Version History

    Introduced before R2006a

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    See Also

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