The perfect reconstruction conditions for a time-varying lapped transform (paraunitary filter
bank) are developed through the factorization of the transform matrix into sparse factors. A …

This paper investigates the theory and structure of a large subclass of M-channel linear-
phase perfect-reconstruction FIR filter banks-systems with analysis and synthesis filters of …

Image compression is a very important issue for several applications in the area of
multimedia communications, the objective being reduction of storage and transmission …

It is well-known that the blocking effect is one of the major drawbacks in the DCT-based
compression schemes (such as JPEG) at low bit rates. In this paper, we propose a novel …

Although widely used in many coding applications, the Modified Discrete Cosine Transform
(MDCT) has the drawback of being sensitive to time shifts. With the popular choice of a sine …

This correspondence presents a scheme for artifact reduction of low bit rate discrete-cosine-
transform-compressed (DCT-compressed) images. First, the DC coefficients are calibrated …

An overlapped block motion compensation scheme, which is especially suitable for hybrid
coding schemes combine with overlapped transforms, is described. Motion compensation is …

A new class of image information restoration algorithms, virtually different from traditional
techniques, is proposed. In comparison with other approaches, our methods use not only the …

In order for wireless devices to function, the signals must be coded in standard ways so that
the sender and the receiver can communicate. This area of video source coding is one of the …

We propose filter banks in the graph spectral domain, where each filter is defined by a sum
of sinusoidal waves. The main advantages of these filter banks are that (a) they have low …