The properties of maximum Lempel-Ziv complexity strings are studied for the binary case. A comparison between MLZs and random strings is carried out. The length profile of both type of sequences show different distribution functions. The non-stationary character of the MLZs are discussed. The issue of sensitiveness to noise is also addressed. An empirical ansatz is found that fits well to the L...

Nowadays, video communications between mobile devices are one of the most demanded multimedia services. Since Wyner-Ziv coding provides low cost video encoding, it is a suitable codec to encode video with less resources. On the other hand, the video delivery provided by Scalable Video Coding covers the needs of a wide range of homogeneous networks and different devices. As a consequence, Wyner-...

Wyner-Ziv coding enables low complexity video encoding with the motion estimation procedure shifted to the decoder. However, the accuracy of decoder motion estimation is often low, due to the absence of the input source frame (at the decoder). In this paper, we propose a novel Wyner-Ziv successive refinement approach to improve the motion compensation accuracy and the overall compression effici...

Recently, new requirements in video coding have emerged. These requirements include bandwidth fluctuation, quality of service and energy constraints. Typically, the encoder has a higher complexity, requiring more energy consumption than the decoder. A new paradigm in video coding, called distributed video coding, enables a reversed complexity coding mode, where the decoder requires more computa...

We address the problem of compression for large light field data acquisition systems and present a distributed scheme based on Wyner-Ziv coding. The proposed scheme allows independent encoding of each view with low-complexity cameras, and performs centralized decoding at the more sophisticated decoder, which takes advantage of side information obtained from additional views acquired by conventi...

The coding efficiency of a Wyner-Ziv video codec relies significantly on the quality of side information extracted at the decoder. The construction of efficient side information is difficult thanks in part to the fact that the original video sequence is not available at the decoder. Conventional motion search methods are widely used in the Wyner-Ziv video decoder to extract side information. Th...

To meet the requirement of distributed video coding (DVC) in resource-limited sensor networks, Wyner-Ziv theorem-based source coding with side information only available at the decoder states that an intraframe encoder with interframe decoder system can achieve comparable coding efficiency of a conventional interframe encoder and interframe decoder system. In this paper, firstly, a block discre...

A risk stratification system to discriminate congestive heart failure (CHF) subjects from healthy subjects is proposed. All the previous research to detect CHF patients using Lempel-Ziv complexity measure had used binary coarsegraining (BLZC). In this work, we show that employing multi-valued coarsegraining Lempel-Ziv complexity (MLZC) improves the performance of classification. This finding is...

We address the problem of compression for large camera arrays, and propose a distributed solution based on Wyner-Ziv coding. The proposed scheme allows independent encoding of each view with low-complexity cameras, and performs centralized decoding with side information from additional views. Experimental results are given for two light field data sets. The performance of the proposed scheme is...