A novel speech waveform generation method using a nonmaximally decimated filter bank is proposed, where spectral features of synthetic sounds are created by amplitude modification of subband samples that are pre-decomposed from impulse or noise waveforms. The proposed method uses two synthesis banks of the maximally decimated pseudo quadrature mirror filter (QMF) bank structure which is similar...

Tree-structured complementary filter banks are developed with transfer functions that are simultaneously all-pass complementary and power complementary. Using a formulation based on unitary transforms and all-pass functions, we obtain analysis and synthesis filter banks which are related through a transposition operation, such that the cascade of analysis and synthesis filter banks achieves an ...

This paper first describes an algorithm that finds the approximate finite impulse response (FIR) inverse of an FIR filter by minimizing the inversion (or reconstruction) error constrained to zero-bias. The generalization of the inverse filtering problem in the two channel case is the design of perfect reconstruction filter banks that use critical sampling. These considerations lead to the deriv...

Efficient two-step algorithms are described for optimizing the stopband response of the prototype filter for cosine-modulated and modified DFT filter banks either in the minimax or in the least-mean-square sense subject to the maximum allowable aliasing and amplitude errors. The first step involves finding a good start-up solution using a simple technique. This solution is improved in the secon...

This paper proposes a subject transfer framework for EEG classification. It aims to improve the classification performance when the training set of the target subject (namely user) is small owing to the need to reduce the calibration session. Our framework pursues improvement not only at the feature extraction stage, but also at the classification stage. At the feature extraction stage, we firs...

Optimization of filter banks based on the knowledge of input statistics has been of interest for a long time. Finite impulse response (FIR) Compaction filters are used in the design of optimal signal adapted orthonormal FIR filter banks. In this paper we discuss three different approaches for the design of interpolated finite impulse response (IFIR) compaction filters. In the first method, the ...

This paper evaluates the performance of various biorthogonal filters using adaptive synthesis filter banks for image compression. The adaptive synthesis filter banks are used to exploit the phase diversity of synthesis filters in subband coding system. Odd length biorthogonal filters are used because even length filters exhibit fractional delay in compression. It is shown that adaptive synthesi...

The paper presents the methodology used to design and implement a new 3D filter, called the CHG filter (Complementary of HourGlass) and the corresponding directional filter bank to detect surface-like singularities in 3D images. This is used for the application of segmenting lamellar colonies in tomographic images of titanium alloy for further microstructural characterization.

The two -channel QMF filter bank based on all pass sections is one of the best known circuits for building up a multi -channel filter bank for signal compression. An analysis -synthesis combination can satisfy two of the three PR conditions. The third, phase condition, can be met to any desired accuracy . In this contribution, we consider the development of explicit formulae for the coefficient...