For low-delay applications in Scalable Video Coding, there are two alternative coding strategies based on AR-FGS for compressing multiple FGS layers. However, their coding efficiencies both suffer largely from the inherent drifting errors. In this paper, a more efficient multiple FGS layers coding structure is presented, which can provide higher coding performance within wide bitrate range and ...

The objective of this paper is to propose a novel method for enhancing end to end QoS of multimedia applications in mobile adhoc networks by using DiffServ approach and Multi Description Coding. The enhancement is achieved by implementing the Multi Description Coding (MDC) at application layer along with Connectionless Light Weight Protocol (UDPLite) in transport layer, Multipath routing and DI...

This paper presents a quality of service routing model for mobile ad hoc networks. Our model considers the characteristics of manet and emulates Intserv and Diffserv in that at application layer it uses end-to-end mechanisms for path establishment and at the network layer it utilizes a coding scheme to guarantee network resources on perhop basis respectively. Furthermore, the model applies a co...

Scalable video coding is important in a number of applications where video needs to be decoded and displayed at a variety of spatial and temporal resolution scales or when resilience to errors is necessary. In this paper, we investigate a temporaldomain approach for resolution scalable video coding. This approach was originally proposed to and since then has been included in the Moving Picture ...

In an on/off-keying atmospheric optical communication system, index of refraction turbulence and PAT (pointing, acquisition and tracking) instabilities create strong and very slow fading compared to the usually used high data-rates. With this channel behavior, forward error correction can only work effectively if the codeword-length is longer than the mean duration of fade. Therefore packet-lay...

Subband coding is becoming a viable compression method for video transmission, since the subband system can be eeciently split into a base layer and an enhancement layer without incurring any overhead. This is desirable in ATM and other packet networks. The base layer can be a standard coding algorithm such as H.261 or MPEG. In a subband-based video coding system, the higher-frequency subbands ...

With the emergence of the High Efficiency Video Coding (HEVC) standard, significant additional video compression improvements have recently been provided, notably around 50% increased compression performance regarding the previously available standard video coding solutions. Moreover, the same requirements which demanded some years ago for a scalable extension of the H.264/AVC standard, named S...

A noncoherent two-way relaying system is developed using physical-layer network coding for improved throughput over conventional relaying in a fading channel. Energyefficient noncoherent operation is achieved using multitone frequency shift keying (FSK). A novel soft-output demodulator is developed for the relay, and corresponding achievable exchange rates are found for Rayleigh fading and AWGN...

In this paper, we evaluate the performance of the hybrid automatic repeat request (ARQ) scheme combined with adaptive coding in satellite communication systems. A cross-layer design which combines the ARQ scheme in the data link layer and adaptive coding and modulation in the physical layer is very important to maximize system throughput and/or performance. Due to the long round trip delay in s...

In this paper we present a rate distortion analysis and a statistical model in order to select coding parameters for memoryless coset codes, for a spatial scalability based mixed resolution Wyner-Ziv framework. The mixed resolution framework, used in this work, is based on full resolution coding of the key frames and spatial 2-layer coding of the intermediate non-reference frames where the spat...