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Search patterns and the center-biased characteristics of motion vector distribution have large impact on both searching speed and quality of block motion estimation. In this paper, we propose a new cross-hexagon search algorithm (NCHEXS) using two cross-shaped search patterns as the first two initial steps and large/small hexagon-shaped patterns as the subsequent steps for fast block motion estimation...
Frame Rate Up-Conversion (FRUC) is required for displaying low frame rate video signals on high frame rate flat panel displays. In this paper, we propose an adaptive true Motion Estimation (ME) algorithm for FRUC of High Definition (HD) video. The proposed ME algorithm produces similar quality results with less number of calculations or higher quality results with similar number of calculations compared...
RGB color signals encoding is more desirable for high resolution and accurate definition for saturations and hue. This paper presents a region adaptive inter-color prediction scheme for 4:4:4 RGB signals, which treats G component as a primary component and predicts B/R component from G component with different weighting factors based on different texture regions. The proposed algorithm demonstrates...
Packet losses or errors of compressed video streams during transmission over error-prone channel may cause serious decline in video quality. Error concealment (EC) at decoder side is an effective technology to reduce this degradation. This paper proposes a Directional Temporal Boundary Match Algorithm (DTBMA) for H.264 considering pixel differences in three directions and "guessing" the...
In this paper, we propose a full reference (FR) video quality assessment (VQA) algorithm for the broadcasting multimedia signal. The relationships between the VQA parameters and the quality score obtained by the subjective human visual system (HVS) model of the distorted videos are investigated. Considering the high correlations and the importance of the VQA parameters, a new FR VQA algorithmis worked...
In order to reduce the computations of motion estimation, this paper proposes a novel edge based partial distortion search (EPDS) algorithm in which the entire macroblock (MB) is divided into different sub-blocks and the calculation order of partial distortion is determined based on the edge strength of sub-blocks. In the proposed method, only selected numbers of search points are considered for candidate...
In block motion estimation, search patterns have a large impact on the searching speed and quality of performance. Based on motion vector distribution characteristics of real world video sequences, we propose a new cross-diamond search algorithm (NCDS) using cross-search patterns before large/small diamond search patterns in this paper. NCDS employs halfway technique to achieve significant speedup...
Search patterns and the center-biased characteristics of motion vector distribution have large impact on both searching speed and quality of block motion estimation. In this paper, we propose a new cross-hexagon search algorithm (NCHEXS) using two cross-shaped search patterns as the first two initial steps and large/small hexagon-shaped patterns as the subsequent steps for fast block motion estimation...
In this paper we introduce a novel algorithm that can detect local features and choose a proper interpolation method for de-interlacing. An edge is a high frequency pattern with certain direction which is a noticeable feature in video sequences. We proposed a wide range ELA (WRELA) algorithm capable of accurately detecting edge directions. The edge direction can be acquired from an optimized procedure...
In this paper, we present a new error concealment scheme for I-frames by exploiting temporal correlations between successive frames. Unlike previous approaches, where only the information in the current frame is utilized, the new approach applies the temporal error concealment approach before considering spatial error concealment. An improved Directional Error Concealment approach that can overcome...
An efficient block-matching (BM) method is proposed in this paper, which is a hybrid of full search (FS) and fast search block-matching algorithms (BMAs). The block-matching process is carried out in two stages. In the first stage, initial block-matching is applied to a few selected blocks in the frame using FS. To reduce computation, the search window size is adaptively adjusted based on the magnitude...
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