We describe an extension to the “best-basis” method to select an orthonormal basis suitable
for signal/image classification problems from a large collection of orthonormal bases …

M channel maximally decimated filter banks have been used in the past to decompose
signals into subbands. The theory of perfect-reconstruction filter banks has also been …

This paper presents a method to remove blocking artifacts in low bit-rate block-based video
coding. The proposed algorithm has two separate filtering modes, which are selected by …

New lapped transforms are introduced. The lapped biorthononal transform (LBT) and
hierarchical lapped biorthogonal transform (HLBT) are appropriate for image coding, and …

It is shown that the covariance operator of a locally stationary process has approximate
eigenvectors that are local cosine functions. We model locally stationary processes with …

Low bit rate image/video coding is essential for many visual communication applications.
When bit rates become low, most compression algorithms yield visually annoying artifacts …

This paper proposes a novel postprocessing technique for reducing blocking artifacts in low-
bit-rate transform-coded images. The proposed approach works in the transform domain to …

With the exception of the harmonic oscillator, quantum wave packets usually spread as time
evolves. This is due to the non-linear character of the classical equations of motion which …

This paper presents a general framework of constructing a large family of lapped transforms
with symmetric basis functions by adding simple time-domain pre-and post-processing …

The use of overcomplete dictionaries, or frames, for sparse signal representation has been
given considerable attention in recent years. The major challenges are good algorithms for …