TCP over wireless networks is challenging due to high random losses and data-ACK interference. To address both problems, a new hybrid network coding scheme, ComboCoding, is proposed. ComboCoding combines intra-flow and inter-flow coding to provide robust communications over TCP in disruptive wireless networks. Intra-flow coding mitigates losses by using a modified random linear coding scheme th...

Speech sinusoidal modeling has been successfully applied to a broad range of speech analysis, synthesis and modification tasks. However, developing a high fidelity full band sinusoidal model that preserves its high quality on speech transformation still remains an open research problem. Such a system can be extremely useful for high quality speech synthesis. In this paper we present an enhanced...

This paper proposes a new selective encryption scheme and a key management scheme for layered access control of H.264/SVC. This scheme encrypts three domains in hierarchical layers using different keys: intra prediction modes, motion vector difference values and sign bits of texture data. The proposed scheme offers low computational complexity, low bit-overhead, and format compliance by utilizi...

The visual signal is highly occupied by regions of homogeneous and repetitive patterns known as Textures. Textures have a common property that their similarity highly deviates from point by point comparison, i.e, two textures can look very similar even if they have some shift, rotation and difference in their distribution. In the context of compression, All of the MPEG reference encoders (inclu...

This chapter provides an overview of the design challenges faced in the implementation of hardware HEVC decoders. These challenges can be attributed to the larger and diverse coding block sizes and transform sizes, the larger interpolation filter for motion compensation, the increased number of steps in intra prediction and the introduction of a new in-loop filter. Several solutions to address ...

Intra prediction is a fundamental prediction type in blockbased video coding, which has been adopted by the most recent finalized standard H.264/AVC. H.264/AVC has specified several intra prediction modes that predict the current block through surrounding spatial neighboring pixels in a causal window along various directions. In this paper, we investigate the use of linear prediction for intra ...

The goal of source controlled channel decoding is to improve the performance of the channel decoder by using the residual redundancy of the source encoded data. The original approach exploits only the interframe correlation between bits and few simple scheme have been devised in order to use the intraframe correlation. In this paper, we present an efficient method to exploit the intraframe corr...

In this work we present a fractal image compression algorithm for inter/intra-frame video coding. We have shown previously how the Iterated TransformationTheory (ITT ) compression algorithm proposed by Jacquin can be modeled as the solution of a second kind twoscale functional equation. This approach allows us to introduce a chain of functional equations which we use to build a pyramid algorith...

In the Differential Pulse-code Modulation (DPCM) image coding, the intensity of a pixel is predicted as a linear combination of a set of surrounding pixels and the prediction error is encoded. In this paper, we propose the adaptive residual DPCM (ARDPCM) for intra lossless coding. In the ARDPCM, intra residual samples are predicted using adaptive mode-dependent DPCM weights. The weights are est...