Introduction to data compression (2nd ed.)
Introduction to data compression (2nd ed.)
Source and Channel Coding: An Algorithmic Approach
Source and Channel Coding: An Algorithmic Approach
Constructions for Variable-Length Error-Correcting Codes
Proceedings of the 5th IMA Conference on Cryptography and Coding
On Variable Length Codes for Iterative Source/Channel Decoding
DCC '01 Proceedings of the Data Compression Conference
Information Theory, Inference & Learning Algorithms
Information Theory, Inference & Learning Algorithms
Computer Networking: A Top-Down Approach Featuring the Internet
Computer Networking: A Top-Down Approach Featuring the Internet
Cross-layer architecture for scalable video transmission in wireless network
Image Communication
Modern Coding Theory
Robust MAC-lite and soft header recovery for packetized multimedia transmission
IEEE Transactions on Communications
Spatial and Temporal Error Concealment Techniques for Video Transmission Over Noisy Channels
IEEE Transactions on Circuits and Systems for Video Technology
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This paper presents a MAP estimation method allowing the robust decoding of compressed video streams by exploiting the bitstream structure (i.e., information about the source, related to variable-length codes and source characteristics) together with the knowledge of the MAC layer CRC (here considered as additional redundancy on the MAC packet). This method is implemented via a sequential decoding algorithm in which the branch selection metric in the decoding trellis incorporates a CRC-dependent factor, and the paths which are not compatible with the source constraints are pruned. A first implementation of the proposed algorithm performs exact computations of the metrics, and is thus computationally expensive. Therefore, we also introduce a suboptimal (with tunable complexity) version of the proposed metric computation. This technique is then applied to the robust decoding of sequences encoded using the H.264/AVC standard based on CAVLC and transmitted using a WiFi-like packet structure. Significant link budget improvement results are demonstrated for BPSK modulated signals sent over AWGN channels, even in the presence of channel coding.