This paper presents two cross-layer optimization strategies based on the IEEE 802.11e standard that enable a robust video transmission using adaptively Forward Error Correction (FEC) channel codes at transport layer and a Multiple Description Coding (MDC) architecture. The first approach classifies the characteristics of the sequence to be coded and selects the most appropriate coding mode acco...

In this paper, we propose a bitstream switching scheme for progressive fine granularity scalable (PFGS) video coding that aims to improve the streaming performance of the scalable bitstreams. By switching among PFGS video bitstreams with different enhancement layer’s reference rates based on the same base layer, significant performance gain can be achieved, especially when the bandwidth fluctua...

Increased speed of workstations and networks have made interactive multimedia communications between workstations across packet-switched networks possible. Transmission of real-time multimedia data over such networks has its limitations and problems. The basic problem pertaining to transmission of audio is synchronization whereas video coding is the main problem for video transmission. ALF and ...

Robustness to packet loss is a critical requirement for video communication over packet switched networks. Intra-coding is an important tool to mitigate the e ects of packet loss by limiting error propagation. This work proposes an algorithm for optimal intra/inter coding mode selection, while utilizing the feedback channel that carries acknowledgement information about received packets. The ov...

The deployment of the higher data rate wireless infrastructure systems and the emerging convergence of voice, video, and data services have been driving various modern multimedia applications, such as video streaming and mobile TV. However, the greatest challenge for video transmission over an uplink multiaccess wireless channel is the limited channel bandwidth and battery energy of a mobile de...

in video coding, intra coding plays an important role in both coding efficiency and error resilience, and current intra coding methods still have great potential to be further investigated. In this paper, a high performance intra coding method based on video epitomic analysis is proposed. Epitomic priors suitable for coding are extracted through video epitomic analysis, and are used to generate...

Video packets have different significances due to the video coding property. When delivering video data without priority strategy over the Internet, it will seriously degrade the received picture quality. This paper proposes an Unequal Priority Arrangement (UPA) mechanism for video transmission on differentiated service networks. UPA determines the priority of a video packet according to the ev...

In this paper, we present a scheme for robust scalable video multicast based on distributed source coding principles. Unlike prediction-based coders, like MPEG-x and H.26x, the proposed framework is designed specifically for lossy wireless channels and directly addresses the problem of drift due to packet losses. The proposed solution is based on recently proposed PRISM (power efficient robust ...

Fine Granularity Scalable (FGS) video coding scheme provides a layered bitstream structure with different importance at different layers. This property makes FGS bitstream more suitable for transmission over the error-prone channels with unequal error protection schemes. Even though the hierarchical FGS enhancement bitstream can always resynchronize in the next video packet when there are trans...

With the recent advancement of video coding techniques and wide spread use of broadband networks, video streaming services over the Internet have attracted considerable attention. The recent video streaming services cover multimedia messaging, video telephony, video conferencing, standard and high-definition TV broadcasting, and those services are provided over wired/wireless networks (Schwarz ...