This paper deals with the design of a pure digital source-channel coding scheme for secure lossy transmission of a discrete memoryless source over a discrete memoryless degraded wiretap channel, where there are correl...
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ISBN:
(纸本)9781629939254
This paper deals with the design of a pure digital source-channel coding scheme for secure lossy transmission of a discrete memoryless source over a discrete memoryless degraded wiretap channel, where there are correlated source side information at the legitimate receiver and eavesdropper, and channel side information noncausally known at the transmitter. Using ideas from time sharing argument, double binning technique, Wyner-Ziv coding and Gelfand-Pinsker coding, a coding scheme is presented and its rate-equivocation-distortion inner bound is derived.
In this paper we advocate a multi-resolution mechanism for redundant information generation and transmission with low overheads in bit-rate, in order to enable reliable video communication over challenging lossy netwo...
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ISBN:
(纸本)9781424442959
In this paper we advocate a multi-resolution mechanism for redundant information generation and transmission with low overheads in bit-rate, in order to enable reliable video communication over challenging lossy networks with low latency. Our previous work entitled RECAP, transmitted a low resolution redundant version of a parent video stream, in order to achieve effective concealment of isolated and burst losses by clever multi-frame super-resolution processing at the decoder. A reference picture selection mechanism was used to transmit the low-resolution redundant video with high guarantee and stop drift in case of losses. In this work, we extend the framework to incorporate an additional distributed Wyner-Ziv coding layer on the low-resolution information to further correct errors, and consequently improve the error-concealed picture quality. The error-concealed super-resolved frame using the low-resolution information alone, now acts as side-information at the decoder to correct additional errors by decoding the Wyner-Ziv layer. Preliminary results are presented to demonstrate the efficacy of the proposed approach.
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