Let be the percentage of zeros among the quantized transform coeÆcients. We discover that, in any typical video coding systems, there is always a strictly linear relationship between and the actual coding bit rate R. This linearity leads to a novel and uni ed source model for di erent types of source data and di erent coding systems, such as H.263 [1], MPEG-2 [2], and MPEG-4 [3]. The proposed l...

This article presents methods for robust and efficient communication over wireless channels. Both benefits and limitations of the classical approach of separate source and channel coding are discussed. Joint source-channel coding (JSCC) is presented as the most promising scheme for communication of analogue sources over wireless channels, due to its ability to cope with varying channel qualitie...

Very efficient still image compression methods exist today, but most of them are not fit for transmission on error prone channels. One example of state-of-the-art robust image coding is the use of wavelet compression followed by forward error correction (FEC), as proposed by Sherwood and Zeger, that gives high coding efficiency but suffers from the incomplete decoding problem. An alternative to...

Over the past decade, rateless codes, i.e., digital fountain codes, have emerged as an efficient and robust solution for reliable data transmission over packet erasure networks and a particularly suitable one for multicasting and broadcasting applications where users may experience variable channel conditions and packet loss rates, such as mobile environments. Luby Transform (LT) and Raptor cod...

With the rapid growth of data communication infrastructure, there has been an increasing demand for multimedia communication services over the past years. This rapid growth has posed new requirements and challenges in many related research areas. This dissertation studies the problem of efficient and robust transmission of image and video content over noisy channels. Firstly, joint source/chann...

In this work, we describe the application of generalized multiple description (MD) source coding architected through the usage of forward error correction (FEC) codes to achieve robust and e$cient Internet video streaming and multicast consistent with the existing Internet architecture. We highlight the synergistic interaction between the robust source coding and packetization strategy and an e...

It has recently been shown that for an image or video transmission scheme to be both eecient and robust in practice that a joint source-channel coding approach is necessary. In this work, we discuss recent eeorts in the eld of joint source-channel coding of images and video. We then present a general methodology for determining the optimal tradeoo between source and channel coding as a function...

The combination of source coding with decoder side-information (Wyner-Ziv problem) and channel coding with encoder side-information (Gel’fand-Pinsker problem) can be optimally solved using the separation principle. In this work we show an alternative scheme for the quadratic-Gaussian case, which merges source and channel coding. This scheme achieves the optimal performance by a applying modulo-...