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Transrating is a bitrate transcoding technique that facilitates video applications in heterogeneous environments. This paper presents a fast coding-unit (CU) mode decision algorithm for transrating a once-encoded HEVC bitstreams to lower bitrate versions of diverse quality levels. The proposed method comprises three major parts. First, an early SKIP decision is based on the modes and motion vectors...
As large multimedia providers rely more and more on Cloud resources to perform video coding and transcoding, designing fast and efficient coders that take advantage of parallelization, particularly for the new video standard HEVC, is of paramount importance. Tiles were introduced in HEVC to provide an alternative parallelization granularity compared to the previous standard H.264/AVC. The premise...
A computing cluster radius method is given, and the data is partitioned into initial clusters by comparing the distance from data to cluster centroid with the size of cluster radius. To implement clustering analysis about data with mixed attributes, namely numerical attributes and categorical attributes, the definitions of distance measure and objective function are improved. By applying clonal selection...
In this paper, we present a novel iris recognition method based on learned ordinal features.Firstly, taking full advantages of the properties of iris textures, a new iris representation method based on regional ordinal measure encoding is presented, which provides an over-complete iris feature set for learning. Secondly, a novel Similarity Oriented Boosting (SOBoost) algorithm is proposed to train...
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