We combine multiple description (MD) quantization, entropy coding, and data partitioning to improve the error resiliency of images over varying packet loss channels. Our proposed scheme degrades gracefully as channel conditions worsen. A multidimensional extension of the two-channel multiple description scalar quantizer (MDSQ) improves robustness. A high performance wavelet image coder is desig...

Diversity techniques often arise as appealing means for improving performance of multimedia communication over certain types of channels with independent parallel components (e.g., multiple antennas, frequency bands, or time slots). Diversity can be obtained by channel coding across parallel components at the physical layer. Alternatively, the physical layer can present an interface to the para...

Multiple description coding encodes a source for transmission over a communication system with multiple channels, which will generate two or more related bitstreams. When errors occur, the corrupted (lost) data can be recovered from the other bitstreams. In this study, a new multiple description motion compensation (MDMC) video coding scheme for lossy packet networks is proposed. In the propose...

In this paper, we propose a selective MV-MDC (Multiple Description Coding of Motion Vector) scheme with the data partitioning in the H.264/AVC standard. The proposed MD (Multiple Description) encoder separates the MV (Motion Vector) into two parts of equal priority each of which is transmitted through an independent packet. Additionally, to reduce the size of bitstream, the proposed MD encoder ...

We investigate the interaction of the source coding mechanism and the transport mechanism for real time data packet transmission over dense networks. We show that single path routing does not make efficient use of network capacity whereas multi path routing techniques do (Proposition 1 and 2). We then consider the interaction of single versus multiple description source coding with single versu...

This thesis devises quantization and source-channel coding schemes to increase the error robustness of the newly standardized ITU-T G.711.1 speech coder. The schemes employ Gaussian mixture model (GMM) based multiple description quantizers (MDQ). The thesis reviews the literature focusing on GMM based quantization, MDQ, and GMM-MDQ design methods and bit allocation schemes. GMM-MDQ are then des...

The multiple access channel with private messages has a single accepted capacity characterization. By contrast, when the same channel is considered with message sources that may be commonly known to multiple transmitters, a plurality of distinct capacity descriptions arises. Two descriptions currently exist in the literature, with the capacity region attained with superposition coding in one de...

We propose to use multiple-description coding (MDC) to protect video information against packet losses and delay, while also ensuring that it can be decoded using a standard decoder. Video data are encoded into a high-resolution stream using a standard compliant encoder. In addition, a low-resolution stream is generated by duplicating the relevant information (motion vectors, headers and some o...