Your paper on the influence of medieval ornaments on contemporary art is due tomorrow. Luckily you have the latest wireless modem for your laptop, and hundreds of pieces from the Metropolitan Museum of Art collection are displayed on its web site. But as you examine the pictures, your web browser repeatedly gets stuck with partially loaded web pages. You see a reliquary, but an empty box sits w...

We consider the problem of coding images for transmission over error-prone channels. The impairments we target are transient channel shutdowns, as would occur in a packet network when a packet is lost, or in a wireless system during a deep fade: when data is delivered it is assumed to be error-free, but some of the data may never reach the receiver. The proposed algorithms are based on a combin...

In this paper we present a framework for estimating corrupted coefficients in multiple description coding (MDC) of images. Descriptions are generated by partitioning the domain of wavelet coefficients into sets whose elements are maximally separated from each other. Consequently an edge-adaptive estimation algorithm is proposed to explore the local texture statistical characteristics for estima...

Multiple description video coding is one method that can be used to reduce detrimental effects caused by transmission over lossy packet networks. In a multiple description system, a video sequence is segmented into two or more complimentary streams in such a way that each stream is independently decodable. When combined, the streams provide the highest level of quality, yet if one of the stream...

We consider the problem of efficient real time video transmission over UMTS channels. Such a problem involves good compression rates and effectiveness in presence of channel failures. We propose a balanced MDC scheme for 3D scan-based DWT video coding. This MDC includes an efficient bit allocation procedure that dispatches the source video redundancy between the different channels[1, 2]. We pro...

In this paper, we address the problem of robust transmission of compressed visual information and propose two transmission schemes based on Multiple Description Scalable Coding (MDSC). In both schemes, we generate four spatial subsequences from the original video stream, by subsampling in both horizontal and vertical directions. Then, each description is encoded using two subsequences using the...

Multiple description (MD) coding is source coding in which several descriptions of the source are produced such that various reconstruction qualities are obtained from different subsets of the descriptions. Unlike multiresolution or layered source coding, there is no hierarchy of descriptions; thus, MD coding is suitable for packet erasure channels or networks without priority provisions. Gener...

A multiple description transform coding (MDTC) method has been reported previously. The redundancy rate distortion (RRD) performance of this coding scheme for the independent and identically distributed (i.i.d.) two-dimensional (2-D) Gaussian source has been analyzed using mean squared error (MSE) as the distortion measure. At the small redundancy region, the MDTC scheme can achieve excellent R...

In this report, we formulate the Multiple Description (MD) coding problem, which was created couple of decades ago. Significant research effort has been devoted to completely characterizing the rate-distortion region of the MD coding problem. Various Information-Theoretical approaches to this problem have been taken, which generate beautiful results. We summarize part of the research effort in ...

The objective of multiple description coding (MDC) is to encode a source into multiple bitstreams supporting multiple quality levels of decoding. In this paper, we only consider the two-description case, where the requirement is that a high-quality reconstruction should be decodable from the two bitstreams together, while lower, but still acceptable, quality reconstructions should be decodable ...