Distributed Coding for Video Services
Duration of project
24 months, with technical extension to November 2007
6th European Frame Programme (EU FP6)
EU FP6 contract nb: FP6-IST-015314
Over the past decade several video coding technologies have emerged to achieve great commercial success and it is widely expected that digital video systems will completely replace all existing traditional analogue based video systems during the next decade. DISCOVER addressed the development of several advanced digital video coding technologies which are very likely to represent a breakthrough in new video coding application scenarios.
Until now video coding research and standardization have been adopting a video coding paradigm where it is the task of the encoder to explore the source statistics, leading to a complexity balance where complex encoders interact with simpler decoders. This paradigm is strongly dominated and determined by applications such as broadcasting, video on demand, and video streaming. Distributed Video Coding (DVC) adopts a completely different coding paradigm by giving the decoder the task to exploit – partly or wholly – the source statistics to achieve efficient compression. This change of paradigm also moves the encoder-decoder complexity balance, allowing the provision of efficient compression solutions with simple encoders and complex decoders.
This new coding paradigm, never considered by any video coding standard, is particularly adequate to emerging applications such as wireless video cameras and wireless low-power surveillance networks, disposable video cameras, certain medical applications, sensor networks, multi-view image acquisition, networked camcorders, etc., where low complexity encoders are a must because memory, computational power, and energy are scarce.
The objective of DISCOVER was to explore and propose new video coding schemes and tools in the area of Distributed Video Coding with a strong potential for new applications, targeting new advances in coding efficiency, error resiliency, scalability, and model based-video coding thus paving the way for a breakthrough regarding the next video coding generation.
- To develop tools to extract and process relevant side information for single and multiple-source DVC set-up (e.g. single and multiple camera systems);
- To study the impact of the different forms of side information on the coder/decoder load balancing attributes of the DISCOVER DVC system;
- To establish rate-distortion bounds with multiple video sources, considering rate balancing among the different sources, as well as transmission channel characteristics;
- To develop source and joint source-channel coding tools to approach at best the theoretic rate-distortion bound.