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Coefficient-level rate distortion optimized quantization (RDOQ) is an efficient tool to improve rate-distortion performance with 6%–8% bit-rate saving. It has been widely adopted in video encoders such as JM, x264, HM and so on. However, software implementation of RDOQ suffers from high computation complexity due to intensive path search and from data dependency caused by context based entropy coding...
This paper proposes generalized context modeling (GCM) for heterogeneous data compression. The proposed model extends the suffix of predicted subsequences in classic context modeling to arbitrary combinations of symbols in multiple directions. To address the selection of contexts, GCM constructs a model graph with a combinatorial structuring of finite order combination of predicted symbols as its...
In virtual reality, hybrid virtual environment (HVE) systems provide the immersed user with multiple interactive representations of the virtual world, and can be effectively used for 3D interaction tasks with highly diverse requirements. We present a new HVE metaphor called Object Impersonation that allows the user to not only manipulate a virtual object from outside, but also become the object, and...
This paper outlines a project called “Virtual-spine” which aims to convert seated posture data into interactive 3D representations of spine movement. Spine movement information is collected from pressure sensors installed at various locations on the seat. Sensor readings are combined with “chair-id” and user “profile” to obtain contextual hypotheses. The output is delivered via a messaging system...
Stakeholder approaches had been applied to the management of organizations with a view to the improvement of all areas of performance, including economic, safety, future policies etc. This paper reviews the origins of stakeholder theory and uses of stakeholder analysis, discusses some of the challenges and limitations of existing methods for stakeholder analysis, provides suggestions on application...
In this paper, we generalize the concept of natural type selection, initially proposed by R.Zamir et.al., to multiple description coding. We prove results that are parallel to those of adaptive single description coding. A universal multiple description coding scheme is then proposed. The scheme codes a source vector at a time, and updates its codebooks based on the joint type of the codewords reconstructed...
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