In this paper, a new approach for MC-DCT (motion compensated – Discrete Cosine Transform) hybrid video coding based on true motion estimation is proposed. The true motion estimation technique employs the leastmedian-squares (LMedS) matching criterion in block matching process for motion estimation. The rationale for using such true motion estimator is that at low bit-rates, very few bits are av...

in some mobile systems, intelligent antennas are used to increase efficiency in a wide frequency band and different environmental and electromagnetic conditions. environmental factors, such as position of nearby objects, antenna mobility and even user type, can vary the antenna input impedance appreciably. therefore, it is necessary to incorporate an adaptive impedance matching circuit between ...

A new block matching algorithm (BMA) especially appropriate for large search areas is proposed. Motion vectors of causally adjacent blocks can be credible motion vector candidates in continuous motion fields. However, they are not helpful for searching complex or random motions. In order to remedy this problem, we propose a new two-step hierarchical block matching algorithm using spatial correl...

Low power VLSI video compression processors are in high demand for the emerging wireless video applications [1]. Video compression processors include VLSI implementation of a motion estimation algorithm. Many motion estimation algorithms are found in the literature. Some of them are fast but can not guarantee an optimal solution; they can be stuck in a local optima. Such algorithms are fast, co...

Motion estimation is one of the major problems in developing video coding applications. Among all motion estimation approaches, Block matching (BM) algorithms are the most popular methods due to their effectiveness and simplicity for both software and hardware implementations. A BM approach assumes that the movement of pixels within a defined region of the current frame (Macro-Block, MB) can be...

The rate constrained block matching algorithm (RCBMA) jointly minimizes displaced frame difference (DFD) variance and entropy, or conditional entropy of motion vectors for determining the motion vectors. It is intended for use in low rate video coding applications, where the contribution of the motion vector rate to the overall coding rate might be significant. The DFD variance versus motion ve...