We describe a robust codec for the transmission of very low bit-rate video over channels with bursty errors. The codec uses a diversity-based method in the form of multiple description codes to reduce the effect of errors in the video bit-stream. To improve the efficiency for transmission of very low bit-rate video, the codec also exploits adaptivity by only protecting macroblocks (using multip...

Structure from motion (SfM) comprises techniques for estimating 3D structures from uncalibrated 2D image sequences. This work focuses on two contributions: Firstly, a stability analysis is performed and the error propagation of image noise is studied. Secondly, to stabilize SfM, we present two optimization schemes by using a priori knowledge about collinearity or coplanarity of feature points i...

Shallow-water environments have become increasingly important for naval operations. Unfortunately, these regions are also characterized by ocean variability and, due to typically downward-refracting conditions, an increased sensitivity to bottom properties. Of course, bottom properties are also often poorly known, especially in shallow water. As a result, there is a lot of concern about 1) how ...

We present a novel transition system, based on the Covington non-projective parser, introducing non-local transitions that can directly create arcs involving nodes to the left of the current focus positions. This avoids the need for long sequences of No-Arc transitions to create long-distance arcs, thus alleviating error propagation. The resulting parser outperforms the original version and ach...

In this paper environment is modeled using depth information provided by a stereo vision system. Workspace is decomposed into voxels which are the smallest volume of environment. A rst observation on the state of the voxels is calculated based on stereo system provided 3D points and triangulation error propagation. A new method for model update using prior and current observations on the voxel ...

T Abstract. A number of methods are compared for modifying an LDL factorization of a positive definite matrix A when a matrix of rank one is added to A. Both the efficiency and error propagation characteristics are discussed, and it is shown that a suitable method must be chosen with care. An error analysis of some of the algorithms is given which has novel features. A worked example which also...

This paper presents a three-step dependency parser to parse Chinese deterministically. By dividing a sentence into several parts and parsing them separately, it aims to reduce the error propagation coming from the greedy characteristic of deterministic parsing. Experimental results showed that compared with the deterministic parser which parsed a sentence in sequence, the proposed parser achiev...

Propagation based nite domain solvers provide a general mechanism for solving combinatorial problems. Diierent propagation methods can be used in conjunction by communicating through the domains of shared variables. The exibility that this entails has been an important factor in the success of propagation based solving for solving hard combinatorial problems. In this paper we investigate how li...