This dissertation considers packet-switched wireless networks for transmission of variable-rate layered hybrid video streams. Target applications are video streaming and broadcasting services. The work can be divided into two main parts. In the first part, a novel quality-scalable scheme based on coefficient refinement and encoder quality constraints is developed as a possible extension to the ...

IEEE specifies different modulation techniques for WiMAX; namely, BPSK, QPSK, 16 QAM and 64 QAM. This paper studies the performance of Internet Protocol Television (IPTV) over Fixed WiMAX system considering different combinations of digital modulation. The performance is studied taking into account a number of key system parameters which include the variation in the video coding, path-loss, sch...

Video transport over wireless Local Area Networks (LANs) usually suffers from signal fading, noise interference, and network congestion, leading to time-varying packet loss rate and fluctuating effective bandwidth. We propose in this paper an adaptive error control scheme to adaptively insert error-resilience features into a compressed video in the media gateway which serves roaming clients. Ou...

The tremendous success of the Internet in providing a global communication infrastructure for a wide variety of applications has inspired the invention of packet video systems for synchronous interpersonal communication. The potential benefits of video-mediated communication are numerous, ranging from improved social interactions between individuals to more efficient distributed collaborative w...

In this paper, we present an effective framework for increasing the error-resilience of low bit-rate video communications over error-prone packet-switched networks. Our framework is based on the principle of layered coding with transport prioritization. We introduce a rate-distortion optimized mode-selection algorithm for our prioritized layered framework. This algorithm is based on a joint sou...

Layered coding (LC) and multiple description coding (MDC) have been proposed as two different kinds of “quality adaptation” schemes for video delivery over the current Internet or wireless networks. To combine the advantages of LC and MDC, we present a new approach – Multiple Description Layered Coding (MDLC), to provide reliable video communication over a wider range of network scenarios and a...

Several compressionschemesfor Internet video utilize block-based conditional replenishment (CR) where block updates are coded independently of the past. In the current Internet video tools, blocks are compressed with a single-layer representation. We propose a new approach that compresses image blocks using a layered representation. Our Layered-DCT (LDCT) compression algorithm, derived from pro...

In this article, we investigate a multi-user video streaming system applying unequal error protection (UEP) network coding (NC) for simultaneous real-time exchange of scalable video streams among multiple users. We focus on a simple wireless scenario where users exchange encoded data packets over a common central network node (e.g., a base station or an access point) that aims to capture the fu...

In this paper, we propose a robust transmission technique for packet-based H.264/AVC video transmission over DS-CDMA wireless channels using Auxiliary Vector (AV) and RAKE-MF receivers and confirm the superiority of the AV receiver. AV Filtering is an iterative algorithm that has fast convergence for short data records. In the proposed system, the H.264 video data packets are packetized and tra...

Copyright © 2006 Jar-Ferr (Kevin) Yang et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. The recently developed video coding standard, H.264/AVC, significantly outperforms previous standards in terms of coding performance at ...