|Title of host publication||IEEE International Conference on Acoustics, Speech and Signal Processing, 2009 (ICASSP 2009)|
|Publisher or commissioning body||Institute of Electrical and Electronics Engineers (IEEE)|
|Publication date||Apr 2009|
|Pages||717 - 720|
|Number of pages||4|
|Conference||International Conference on Acoustics, Speech, and Signal Processing (ICASSP)|
|Period||1/04/09 → …|
Systems with cheap/simple/power efficient encoders but complex decoders make applications such as low cost, low power remote sensors practical. Bandwidth considerations however are still an issue and compression efficiency has to remain high. In this paper, we present a distributed video codec (DVC) that we are developing with the aim of achieving such a low power paradigm at the cost of only a small compression performance deficit relative to the current state of the art, H.264. The proposed system employs spatial interleaving of KEY and Wyner-Ziv data which allows efficient side information (SI) generation through block-based error concealment, a Gray code that increases the accuracy of bit probability estimation, and a diversity scheme that produces more reliable results by exploiting multiple SI generated data. Simulation results show an improvement of the proposed scheme over H.264 intra coding of up to 1.5 dB. We additionally propose two mechanisms for selective parity bit feedback requests that can further reduce the WZ bitrate by up to 15%
Rose publication type: Conference contribution
Additional information: With accompanying conference presentation
Sponsorship: This work was undertaken as part of EPSRC grant EP/E065538
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- DVC, video coding, multi-hypothesis
International Conference on Acoustics, Speech, and Signal Processing (ICASSP)
|Duration||1 Apr 2009 → …|