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An efficient framework of distributed compressive video coding using Enhanced side information for WSN is proposed. At the encoder, the incoming video frames are split into key frames and Wiener-Ziv (WZ) frames depending on Group of Picture (GOP). Based on Distributed Video Coding (DVC) these frames are processed independently and transmitted over WSN. Generally the WZ frames are encoded at a lower...
In Distributed Video Coding (DVC) the encoder compresses frames at source rates that depend on the statistical dependency between the Wyner-Ziv (WZ) and side information frames. An important issue that we address in this paper is providing the encoder with a mechanism to identify the source rate to be used in encoding a WZ frame. One possible solution is to follow a feedback approach; the encoder...
In this paper we describe a practical implementation of a distributed video codec deployed on a real visual sensor platform, viz. the MicaZ/Cyclops platform. The codec supports two encoding schemes, one employs Discrete Cosine Transform (DCT) and the other operates on raw pixels. DCT scheme is more costly in terms of computational power consumption, on the other hand it leads to more compression and...
In this paper we apply a generalized approach for practical Network Coding (NC) called Multi-Generation Mixing (MGM) in networks communicating scalable video contents. NC has been a viable approach of communication in packet loss networks. On the other hand NC losses are expensive. NC losses reduce the ability of receiver to decode packets, and hence may severely degrade the quality of recovered video...
In this work, we propose an unequal error protection (UEP) scheme for scalable video coding using low density parity check (LDPC) codes. LDPC codes are renowned for their near-capacity performance. In the proposed framework, a video sequence is coded based on scalable video coding (SVC) H.264/AVC standard document. We divide the SVC coded video stream into different sub-streams in terms of time and...
Reliably transporting captured video content over Wireless Sensor Networks (WSNs) poses several challenges due to the unique energy constraints presented by individual sensor nodes. The nature and amount of video content is another challenge that further complicates WSN data reliability problem. Motivated by the aforementioned factors, in this work, we propose an architecture that promises to enhance...
Interleaved Source Coding (ISC) is one of the error resilient coding methods for predictive video coded frames transmitted over a single erasure channel. ISC has shown to significantly improve the overall quality of predictive coded video stream over a lossy channel. In this paper, ISC is evaluated over memoryless Binary Erasure Channel (ISC-BEC). Simulations have shown the superiority of ISC over...
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