Fabio Verdicchio

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Video transmission over variable-bandwidth networks requires instantaneous bit-rate adaptation at the server site to provide an acceptable decoding quality. For this purpose, recent developments in video coding aim at providing a fully embedded bit-stream with seamless adaptation capabilities in bit-rate, frame-rate and resolution. A new promising(More)
Real-time delivery of video over best-effort error-prone packet networks requires scalable erasure-resilient compression systems in order to 1) meet the users' requirements in terms of quality, resolution, and frame-rate; 2) dynamically adapt the rate to the available channel capacity; and 3) provide robustness to data losses, as retransmission is often(More)
Scalable wavelet-based video codecs using spatial-domain motion compensated temporal filtering (SDMCTF) require a quality-scalable motion vector codec (MVC) to support a large range of bit-rates with optimal compression efficiency. This letter introduces a new prediction-based architecture for quality-scalable motion vector coding that outperforms the(More)
Modern video coding applications require data transmission over variable-bandwidth wired and wireless network channels to a variety of terminals, possibly having different screen resolutions and available computing power. Scalable video coding technology is needed to optimally support these applications. Recently proposed wavelet-based video codecs(More)
Multimedia applications emerge on portable devices everywhere. These applications typically have a number of stringent requirements: (i) a high amount of computational power together with real-time performance and (ii) the flexibility to modify the application or the characteristics of the application at will. The performance requirements often drive the(More)
— Nowadays multimedia applications emerge on portable devices everywhere. These applications typically have a number of stringent requirements. A first requirement is a high amount of computational power together with real-time performance. A second requirement is that they must be reconfigurable i.e. that the application or the characteristics of the(More)
Scalable multiple-description (MD) coding allows for fine-grain rate adaptation as well as robust coding of the input source. In this paper, we present a new approach for scalable MD coding of images, which couples the multiresolution nature of the wavelet transform with the robustness and scalability features provided by embedded multiple-description(More)