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Transmission of coded video over erroneous channels (e.g., Internet and wireless networks) is always a challenging task. Error control strategies, to combat the channel errors, are generally applied at individual network layers leading to inefficient utilization of resources. The cross-layer design has emerged as alternative for efficient utilization of the available resources, such as bandwidth,...
This paper investigates the capabilities of Hierarchical Quadrature Amplitude Modulation (HQAM) to provide Unequal Error Protection (UEP) to H.264/AVC encoded video bitstream. The UEP is based on the asymmetrical error sensitivity of the coded bitstream and exploits data partitioning mode of H.264/AVC to provide protection to their sensitivity to channel errors. The more important bits called High...
In this paper, an optimized unequal error protection scheme using Forward Error Correction (FEC) for transmission of embedded video bitstream over AWGN channel is investigated. The scheme exploits the non-uniform importance and error sensitivity of the bits generated by the a wavelet video coder. Depending upon their importance in the reconstruction of the video, the bitstream is first divided into...
The wavelet-based video coders are excellent in providing the fine granular scalability (FGS), i.e. progressive bitstream, which can be used to multicast the video transmission to different users requiring different bit-rate, resolution and frame rate, from single coded bitstream. However, transmission of these bitstreams over erroneous channel is a challenging task. In this paper, application layer...
Error control strategies to video bitstream are usually provided at different layers of the communication network. Optimizing the error control strategies at different layers independently leads to inefficient utilization of the resources. In this paper, a cross-layer strategy to optimally utilize the application and physical layer resources for unequal error protection (UEP) of wavelet coded scalable...
In this paper, the performance of unequal error protection (UEP) scheme for wavelet coded video using multi-layered 64-Hierarchical QAM (64-HQAM) is presented. Depending on the error sensitivity of coded video bitstream against channel errors, the bitstream is partitioned into multiple sub-streams. The most sensitive sub-stream is assigned highest protection while least sensitive are assigned lowest...
This paper proposes an efficiently-mapped adaptive hierarchical QAM (AHQAM) scheme for unequal error protection (UEP) of embedded video bitstream. The coded bits of each frame are hierarchically partitioned into high priority (HP) and low priority (LP) substream, using two-staged partitioning strategy. Then pairs of stream blocks, one from each substream are selected judiciously to form symbols, which...
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