We propose a computational opinion model for estimating the video quality of videophone services. Although opinion models for speech such as the E-model have been established and widely used, little attention has been given to opinion models for video quality estimation. Our proposed opinion model is useful as a network-planning tool using several video parameters that affect the quality of vid...

Video streaming over Vehicular Ad Hoc Networks (VANETs) offers the opportunity to deploy many interesting services. These services, however, are strongly prone to packet loss due to the highly dynamic topology and shared wireless medium inherent in the VANETs. A possible strategy to enhance the delivery rate is to use redundancy for handling packet loss. This is a suitable technique for VANETs ...

In this paper, we introduce a highly scalable video compression system for very low bit-rate videoconferencing and telephony applications around 10–30 Kbits/s. The video codec first performs a motion-compensated three-dimensional (3-D) wavelet (packet) decomposition of a group of video frames, and then encodes the important wavelet coefficients using a new data structure called tri-zerotrees (T...

Packet delay jitter and loss due to network congestion pose significant challenges for designing and deploying delay sensitive multimedia applications over the best effort packet switched networks such as the Internet. Recent studies indicate that using Multiple Description Coding (MDC) in conjunction with path or server diversity can mitigate these effects. However, the proposed MDC coding and...

With the deployment of 2.5G/3G cellular network infrastructure and large number of camera equipped cell phones, the demand for video enabled applications are high. However, for an uplink wireless channel, both the bandwidth and battery energy capability are limited in a mobile phone for the video communication. These technical problems need to be effectively addressed before the practical and a...

Advances in multimedia devices, video compression efficiency and increased availability of network bandwidth have increased the proliferation of multimedia applications. However, the proliferation of these applications has also increased the need to maximize available network resources and also meet end users’ Quality of Experience (QoE) and expectations. We present results for end-to-end video...

In this text we consider the problem of robust image/video coding and packetization for the purpose of communication over a packet network. The focus is on Internet transmission. A novel method for achieving error resilience in subband-coded image/video communication is presented. Its characteristic is that subband coe¢cients stored in the same packet are dispersed across the space-frequency do...

in this paper, we propose a new full-fuzzy video ratecontrol algorithm (rca) for variable bit rate (vbr) videoapplications. the proposed rca provides high qualitycompressed video with a low degree computational complexity.by controlling the quantization parameter (qp) on a picturebasis, it produces vbr video bit streams. the proposed rcahas been implemented on the jm h.264/avc video codec andth...

Most of current packetization schemes consider only bit error or packet erasure, both of which are common in wireless networks. This paper addresses these two problems together, and proposes an optimal packetization scheme for video streaming over wireless network, which is independent of video coding method. To combat the packet erasure, priority packetization combined with multi-layer unequal...

This paper describes a three-screen television system using a block recovery rate (BRR)-based unequal error protection (UEP). The proposed in-home wireless network uses scalable video coding (SVC) and UEP with forward error correction (FEC) for maximizing the quality of service (QoS) over error-prone wireless networks. For efficient FEC packet assignment, this paper proposes a simple and effici...