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Palette mode is the new coding tool that has been adopted in the Screen Content Coding Extensions of High Efficiency Video Coding (HEVC SCC). Palette mode can represent colour clusters for screen content efficiently and can be summarized into two parts: palette coding tools and colour index map coding tools. This paper proposes two techniques to improve colour index map coding: transition copy and...
In screen content video, the spatial correlation among pixels shows different characteristics as compared to natural content video. Intra-picture motion compensation (or intra block copy in HEVC) plays a key role in reducing the bit rate of representing high resolution video with contents such as text and graphics. The efficiency of intra block copy is highly related to the accuracy of block vector...
With the development of HEVC Screen Content Coding (SCC) extension, intra block copying (IntraBC) mode have been proven to be a very efficient tool in coding of typical screen content video materials. Currently, the decision of IntraBC usage is on coding unit (or CU) level. The coding modes for all the possible partitions inside a CU should be the same. If a CU contains pixels of different objects,...
To achieve high coding performance for screen content, the intra block copy (IntraBC) performs block matching within a limited area of the reconstructed samples inside the current picture. We further extend its notion from the unit of square coding unit (CU) to non-square prediction unit (PU) partitions. This design is then justified by theoretical and empirical analyses which reveal the same fact...
This paper introduces a novel inter-layer intra mode prediction method for scalable extension of High Efficiency Video Coding (HEVC) standard, which is being developed by the Joint Collaborative Team on Video Coding (JCT-VC). In HEVC and its scalable extension, thirty-five intra prediction modes are adopted to reduce the spatial redundancy of luma texture within one frame, which may introduce noticeable...
In the context of scalable video coding, we present in this paper a general prediction mechanism to combine temporal and inter-layer reference signals for compressing the enhancement-layer (EL). By utilizing the proposed combinations, the EL temporal prediction residue can be further predicted from a referenced base-layer (BL) temporal residue; or, the inter-layer prediction residue between EL and...
This paper introduces a novel inter-layer adaptive filtering method for scalable extension of High Efficiency Video Coding (HEVC) standard, which is being developed by the Joint Collaborative Team on Video Coding (JCT-VC). The scalable extension of HEVC is currently utilizing an interlayer texture prediction method, in which the prediction of texture at enhancement layer is derived from the collocated...
In scalable video coding, reconstructed base-layer samples can be used as predictor for compressing enhancement-layer samples. This inter-layer predictor typically exhibits specific type of artifacts, arising from coarse quantization and upsampling processes. To suppress these artifacts, we propose an inter-layer filtering scheme which adapts to local orientations. On a sample-by-sample basis, it...
This paper presents a mechanism of using rectangular prediction blocks for Intra prediction in the emerging High Efficiency Video Coding (HEVC) standard. In the previous and current video coding standards, Intra predictions have been processed on square blocks, e.g. 16×16, 8×8 and 4×4 pixel blocks H.264/MPEG4 AVC, and 2N×2N or N×N square prediction units (PU) in the current HEVC. In this paper, it...
New High Efficiency Video Coding (HEVC) standard is designed to provide substantial coding efficiency improvement compared to H.264/AVC. Latest subjective testing shows 50% improvement has been achieved. Many new technologies contribute to the overall improvement. Intra prediction with 35 modes is one of the key improvements. Associated with that, there is a new intra mode coding method to efficiently...
In the ISO/IEC 14496-10 |ITU-T H.264 advanced video coding (AVC) standard, the prediction block sizes can be 16×16, 8×8 and 4×4 for Intra prediction; 16×16, 16×8, 8×16, 8×8, 8×4, 4×8 and 4×4 for Inter prediction. In the first HEVC test model (HM1.0), each 2N×2N Intra CU may consist of either one 2N×2N prediction unit (PU) or four N×N prediction units; while each 2N×2N Inter CU may consist of one 2N×2N...
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