Superdense coding is a fundamental protocol in quantum communication, which enables us to send two bits of information by the transmission of just a single qubit. In this paper, we consider superdense coding through a...
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The H. 264 Advanced Video coding (H. 264/AVC) standard is considered to be the most commonly used format for video compression. Although it supports a very broad applications range covering all forms of digital compre...
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ISBN:
(纸本)9781509043149
The H. 264 Advanced Video coding (H. 264/AVC) standard is considered to be the most commonly used format for video compression. Although it supports a very broad applications range covering all forms of digital compressed video, the confidentiality of the encoded content needs enhancements. The present work proposes a new selective encryption scheme with multiple security levels. In fact, depending on the encrypted coefficients nature, five different cryptographic scenarios are proposed. They provide an effective confidentiality and deal with the real-time processing requirements. The Hardware/Software co-simulation and the experimental results proved the efficiency of the proposed crypto-system that will be suitable for real-time video applications and resource-limited systems.
The traditional multiview video coding (MVC) is based on hierarchical B picture (HBP) disparity/time hybrid prediction structure, making full use of the disparity and time correlation, largely improve the encoding eff...
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Network coding considers as a major ability to achieve higher throughput. Toward that goal, this article investigates and analyzes soft decision scheme of network coding (SDS-NC) at relay node to exchange encoding BPS...
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In this paper, a novel image compression algorithm based on the wavelet transform is discussed. The wavelet transform operation is deployed firstly for the image waiting for being coded and the uniform quantization is...
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A steganographic method is proposed to embed secret data in GSM full rate transcoding bit stream. Depending on the unequal importance with respect to speech subjective quality of encoded parameters and their individua...
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ISBN:
(纸本)9781424405169
A steganographic method is proposed to embed secret data in GSM full rate transcoding bit stream. Depending on the unequal importance with respect to speech subjective quality of encoded parameters and their individual bits, appropriate hits, which have relatively low importance for the quality of host speech, are chosen to embed secret data. The secret information can be anything such as another compressed speech or a text. The mean opinion score (MOS) of the stego-speech is around 3.5, satisfying the requirement of communication quality.
In the paper, a novel stereo video codec algorithm based on fast disparity and motion estimation is proposed. Firstly, this paper makes some changes to the conventional fractal video coding method. We use tree structu...
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The distributed video coding (DVC) is a new coming video compression technology that utilizes a different computing complexity mode from the traditional video codec. As a new paradigm there are some fundamental and ha...
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ISBN:
(纸本)0769529097
The distributed video coding (DVC) is a new coming video compression technology that utilizes a different computing complexity mode from the traditional video codec. As a new paradigm there are some fundamental and hard questions in DVC that are not sufficiently addressed, for example the complexity balance between DVC encoder and decoder. This will be an important factor for some promising real time applications. In this context, this paper studies the factors which affect the decoding complexities of turbo code based DVC especially focuses on quantization, side information and turbo code bit rates. Analyzing and simulation results show that precise side information will decrease the turbo decoding complexity, large reductions in computations can be traded against relatively small increases in bit rate, and uniform quantizer possesses the advantage than the non-uniform quantizer in computation load at a expense of a little decrease in rate distortion performance.
With the growing demands for 3D and multi-view video content, efficient depth data coding becomes a vital issue in image and video coding area. In this paper, we propose a simple depth coding scheme using multiple pre...
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Efficient Lossless Records Compression AdapuseAritadaptive arithmetic coding approach uses an entropy coder to safely and appropriately encode facts. This method works by supplying a frequency distribution for symbols...
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