Recent Patents on Computer Science - Volume 2, Issue 3, 2009

Wireless communication systems have witnessed tremendous growth over the last decades. However, the efficient and accurate characterization of the propagation channel still remains one of the most challenging and important issues in modern wireless communications. In order to meet the demands of a wide variety of applications, advanced propagation models that incorporate detailed representations of complicated prop Read More

With the rapid growth of multimedia information, video coding standards have become crucial when transmitting large amount of video data. Motion estimation promises to be the key to high performance in video coding by removing the temporal redundancy of video data for storage and transmission. Due to its fundamentality, research works on motion estimation have been conducted extensively. In this article, an overvi Read More

In distributed computing, the peer-to-peer paradigm enables two or more entities to collaborate spontaneously in an overlay network of equals (peers) by using appropriate information and communication schemes without the necessity for central coordination. The key concept of the peer-to-peer paradigm is leveraging idle resources to do something useful, based on a collaborative approach. The increasing academic and i Read More

Computer-based educational systems are becoming increasingly important in all levels and types of education. Intelligent Educational Systems (IESs) are computer-based educational systems encompassing Artificial Intelligence schemes to increase the effectiveness of the learning process. In this paper, we survey patents regarding IESs. As IESs we consider either Intelligent Tutoring Systems (ITSs) or Adaptive Educational H Read More

Background modeling is often used to detect moving object in video acquired by a fixed camera. Recently, subspace learning methods have been used to model the background in the idea to represent online data content while reducing dimension significantly. The first method using Principal Component Analysis (PCA) was proposed by Oliver et al. [1] and a representative patent using PCA concerns the detection of cars and p Read More

Owing to the video distribution over heterogeneous networks, Scalable Video Coding has become a trend in the last years. As the promising candidates for SVC the Wavelet-based solutions should face the challenges aroused by motion estimation and motion compensation. This paper, according to the WSVC coding context, reviews the motion estimation techniques applied in RDWT and MCTF architectures and the corr Read More

The patents annotated in this section have been selected from various patent data bases. These recent patents are categorized by different information and computation, computer graphics, artificial intelligence, cybernetics, hardware and architecture, software, theory and methods involved and related to computer science and are relevant to the articles published in this journal issue.