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Multi-view plus depth (MVD), as a video representation supporting view synthesis based on depth video, has attracted more and more attention for the free view video (FVV) application. It is a challenge to efficiently compress the multi-view depth data in MVD format. In this paper, we explore the geometric relationships in 3D space and propose a geometric mapping assisted (GMA) multi-view depth video...
Stereo interleaving format attracts more and more attention due to its back compatibility with all existing 2D video coding standards as well as its high efficiency of stereoscopic video compression. As one of the most significant coding components, rate-distortion optimization (RDO) in stereo interleaving video coding does not take into account its application scenarios where the reconstructed video...
The coding efficiency improvement of stereoscopic video system is a hot research topic in the 3D video coding areas. To better exploit the redundancy between the two channels of stereoscopic video, a stereoscopic video coding scheme for Audio Video Coding Standard (AVS) is proposed in the paper. The superior coding performance of the proposed scheme benefits from an enhanced block prediction algorithm,...
Temporal scalability is a very important part in scalable video coding (SVC). The traditional MCTF (motion compensated temporal filtering) algorithm, hierarchical B-picture, low-delay hierarchical P-picture have been adopted in H.264 SVC's extension gradually. Our researching focus on low-delay hierarchical P-picture structure, the traditional low-delay hierarchical P-picture structure have some shortcoming:...
In this paper, we propose an adaptive region of interest (ROI) algorithm for scalable video coding. ROIs are encoded in every temporal layer, while background (non-ROI) is skipped selectively in enhancement layers. The background skipping decision is based on an adaptive estimation of motion activity. And the saving bits could be used to enhance the ROI spatial quality. The overall perceptual quality...
The advanced audio video coding standard-mobile version (AVS-M) is established by AVS Working Group of China for mobile multimedia applications. To meet demands for communication between multimedia source and mobile system, transcoding from MPEG-2 to AVS-M is a key technology. In this paper, we propose a macroblock layer rate control algorithm for MPEG-2 to AVS-M transcoding with the consideration...
AVS-M (the advanced audio video coding standard-mobile version) is established by Audio Video Standard Working Group of China for mobile-multimedia applications. To meet demands for communication between multimedia source and mobile system, transcoding from MPEG-2 to AVS-M is a key technique. However, the advanced intra and inter mode decision techniques adopted in AVS-M have a high computing requirement,...
AVS (the advanced audio video coding standard), established by audio video standard working group of China, achieves higher coding efficiency than MPEG-2. In contrast to MPEG-2, where only inter prediction mode with 16times16 block size is used, AVS also supports inter modes with 16times8, 8times16, 8times8 block size. This presents a challenge to MPEG-2-to-AVS transcoder for a good balance between...
A common problem with teleconferences is awkward turn-taking-particularly 'collisions,' whereby multiple parties inadvertently speak over each other due to communication delays. We propose a model for teleconference discussions including the effects of delays, and describe tools that can improve the quality of those interactions. We describe an interface to gently provide latency awareness, and to...
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