A Spectral Factorization Approach to Pseudo-QMF Design
نویسندگان
چکیده
منابع مشابه
A Spectral Factorization Approach to Pseudo-QMF Design
A new approach to the design of M-channel pseudoquadrature-mirror-filter (QMF) banks is presented. In this approach, the prototype filter is obtained as a spectral factor of a 2Mth band filter. This completely eliminates the need for optimization whereas in conventional pseudo-QMF designs, the main computational effort is in optimization of the prototype. As in the conventional approach, the al...
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The spectral factorization approach to pseudo-QMF design doesn't involve any optimization in order to obtain the prototype filter used in the cosine modulation. In this paper, the initial phase factor influence on amplitude distortion is analyzed and a new expression to design pseudo-QMF bank without restriction on the filter's length is proposed. This filter bank introduces a very small aliasi...
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The process of designing a prototype filter for a pseudo quadrature mirror filter (QMF) cosine-modulated bank can require the optimization of a highly nonlinear cost function to obtain its coefficients or the calculation of a spectral factor of a valid 2Mth band filter. This article presents a new method for designing pseudo-QMF banks in which none of the aforementioned procedures are required....
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This paper studies the design of quadrature mirror lter (QMF) banks via frequency domain optimizations. A direct approach is adopted that gives the necessary and suucient condition for perfect reconstruction (PR). While analysis lter banks are designed to achieve frequency domain speciications required for subband coding, synthesis lter banks are designed to minimize the reconstruction error in...
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ژورنال
عنوان ژورنال: IEEE Transactions on Signal Processing
سال: 1993
ISSN: 1053-587X
DOI: 10.1109/tsp.1993.193129