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In 3D-HEVC, a new coding standard of 3D video, Explicit Wedgelet mode within Depth Modelling Modes (DMM) partitions a depth block into two non-rectangular regions using a Wedgelet pattern selected from a Wedgelet lookup table. The Wedgelet lookup table is constructed during both encoder and decoder initialization for each block size ranging from 4×4 to 16×16, while the Wedgelet lookup table consists...
To accurately represent object edges in depth maps, new depth intra prediction modes, namely Depth Modelling Modes (DMMs), are introduced into 3D-HEVC. In the DMMs, a depth block is approximated by a model that partitions the block into two non-rectangular regions, where each region is represented by a constant value referred to as Constant Partition Value (CPV). To code the CPV, a predicted CPV for...
This paper proposes a new efficient bypass coding scheme (EBCS) based on Logarithmic Binary Arithmetic Coding (LBAC). The bypass coding model is used to encode a symbol which has equal probability (0.5). The percentage of the bypass coding model is about 25 in CABAC of H.265/HEVC. The proposed EBCS provides a hardware-efficient design that can significantly increase the processing speed, and it has...
A Fast Segment-wise DC Coding (SDC) algorithm is proposed for 3D-HEVC depth intra coding. Since SDC is a supplementary option for intra prediction modes, it is not necessary to check SDC option for all intra candidate modes during full Rate-Distortion (RD) cost calculation. Based on the observation that most Prediction Units (PUs) choose the same intra coding mode with and without SDC option, we propose...
Depth map is a kind of video clip that contains 3D object's depth information, and is an important coding feature in the recently 3D video coding standards, which has been applied for the latest 3D coding approaches, e.g. MV-HEVC and 3D-HEVC. It has been approved that the support of depth map coding can significantly improve the coding performance for 3D videos, and provide more flexibility for 3D...
This paper presents an improved Segment-wise Direct Component (DC) Coding (SDC) for High Efficiency Video Coding (HEVC) intra prediction of depth maps. In the current 3D-HEVC, predicted DC in the SDC for HEVC intra prediction modes is calculated as the average of four corner samples in a predicted block. However, this method may introduce errors when SDC employs depth lookup table (DLT). To reduce...
This paper proposes a fast mode decision algorithm for 3D High Efficiency Video Coding (3D-HEVC) depth intra coding. In the current 3D-HEVC design, it is observed that for most of the cases, full Rate-Distortion (RD) cost search of Bi-partition mode could be skipped since most coding units (CUs) of depth map are very flat or smooth while Bi-partition modes are designed for CUs with edge or sharp transition...
AVS2 is an ongoing standardization effort by Audio Video coding Standard Workgroup of China toward high efficiency coding of multimedia compared to the previous standard (AVS1). AVS2-P2 is the video part for high-definition, ultra-high-definition and three dimensional video contents. Raw video content of 10-bit bit depth has superior visual quality compared to traditional 8-bit counterpart. Thanks...
A simplified depth modeling mode (DMM) selection algorithm is proposed for 3D-HEVC depth intra coding. Since DMMs are designed for coding units (CUs) with edge or sharp transition, it is not efficient for smooth CU compression. Based on the observation that most CUs in a depth frame are smooth or flat, we notice most of the DMM full-Rate-Distortion (RD) search could be skipped. Using the modes in...
With rapid growth of HD video applications, AVS started HD video profile standardization process in March 2008 and finalized in September 2009. In the late of year 2011, the broadcasting industry standard for HD video compression was developed based on this work and has been recently completed and approved. It uses state-of-the-art coding tools and provides enhanced coding efficiency tools for high-definition...
High Efficiency Video Coding (HEVC) is the latest international standard of video coding under development. In HEVC, the new technology of intra prediction, Unified Directional Intra (UDI), has shown significant improvement on coding performance. Comparing to the intra prediction of H.264/AVC, significant performance improvement was observed for all intra configured tests [2]. In the HEVC Test Model...
Current default intra prediction method in the current test model for the next generation video coding standard JCT-VC, Unified Intra Prediction, has up to 33 directional modes and only one non-directional mode, which is Intra DC mode. Having only one non-directional mode is insufficient for maintaining accuracy on prediction units with complex texture. In this contribution, Plane Mode is integrated...
This paper describes an efficient entropy coding method for macroblock modes in H.264 based on the statistical information of the previous frame. H.264/MPEG-4 AVC video coding introduces some new macroblock sub-types (modes) that allow for better rate-distortion (R-D) coding. These modes are coded with a fixed mapping table when context adaptive variable length coding (CAVLC) is used. Based on our...
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