In 1997, we published a high performance scalable bitrate-oriented wavelet image codec, Significance Linked Connected Component Analysis (SLCCA). In term of coding efficiency, SLCCA outperforms EZW, SPHIT and JPEG2000, which are each an embedded image codec. SLCCA is optimized for any given bit rate. Although scalable, its coded bit stream is not fully embedded. In the paper, we provide an embe...

Scalable video coding (SVC) is an extension of H.264/MPEG 4 AVC approved by JVT on November, 2007. The characteristic of the SVC is the encoding of a high-quality video bitstream that contains one or more enhancement layer bitstreams in addition to the base layer bitstream. We propose a fast enhancement layer macro block (MB) mode decision algorithm for spatial scalable SVC utilizing statistica...

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 derive an asymptotically optimal multi-layer coding scheme for entropy-coded scalar quantizers (SQ) that minimizes the weighted mean-squared error (WMSE). The optimal entropy-coded SQ is non-uniform in the case of WMSE. The conventional multi-layer coder quantizes the base-layer reconstruction error at the enhancement-layer, and is sub-optimal for the WMSE criterion. We consid...

An object–based layered codec is submitted for formal testing of object scalability and improved coding efficiency at very low bit rates using class–A sequences. The codec consists of 3 layers. In layer 1, only colour parameters are transmitted. In layer 2, additionally motion parameters are transmitted. In layer 3, additionally to colour and motion parameters shape parameters are transmitted. ...

In this paper, we propose LOCL, a loop coding layer which sits between IP and traditional MAC. Traditional network coding schemes mainly focus on reducing transmissions, while loop coding exploits network coding to reduce link loss rate. We analyze the performance of traditional network coding schemes and loop coding based on a rather general traffic pattern. We find that loop coding is more ap...

Recent advances in network coding have shown great potential for efficient information multicasting in communication networks, in terms of both network throughput and network management. In this paper, we address the problem of rate control at end-systems for network coding based multicast flows. We develop two adaptive rate control algorithms for the networks with given coding subgraphs and wi...

We establish a random variable substitution lemma and use it to investigate the role of refinement layer in multiple description coding, which clarifies the relationship among several existing achievable multiple description rate-distortion regions. Specifically, it is shown that the El Gamal-Cover (EGC) region is equivalent to the EGC* region (an antecedent version of the EGC region) while the...