This paper presents selective intra coding and early inter skip fast mode decision algorithm for H.264/AVC and compares performance of H.264/AVC with prior standards. Video coding standard H.264/AVC provides gains in compression efficiency of up to 50% over a wide range of bit rates and video resolutions compared to previous standards. In order to achieve this, a robust rate-distortion optimiza...

High Efficiency Video Coding is a new video coding standard after H.264/AVC. By introducing a flexible coding unit, which can be recursively divided from 64×64 to 8×8 blocks in a Quadtree-Structure, HEVC achieves significantly higher coding efficiency than the previous standards. With the flexible CU structure, HEVC can effectively adapt to highly varying contents with a smaller CU or to flat c...

In this paper, a wavelet-based spatially scalable video coding scheme with in-band prediction is investigated in combination with JPEG 2000 quantization and arithmetic coding. The wavelet decomposition of each frame of the video data is succeeded by the computation of a blockwise motion compensated prediction for the individual subbands. To achieve half-pixel motion vector accuracy the shift-in...

such as interframe coding combined with variable length codes[9] or conditional replenishment[6] [8], that are less efficient than current coding techniques. Other techniques such as subband coding[1] have demonstrated promise for only a few types of services. Another recent study, which provides insights into long run statistics for coded video sequences, used block based intraframe discrete c...

The latest international video coding standard, H.266/Versatile Video Coding (VVC), supports high-definition videos, with resolutions from 4 K to 8 or even larger. It offers a higher compression ratio than its predecessor, H.265/High Efficiency (HEVC). In addition the quadtree partition structure of H.265/HEVC, nested multi-type tree (MTT) H.266/VVC provides more diverse splits through binary a...

Video coding standards are primarily designed for efficient lossy compression, but it is also desirable to support efficient lossless compression within video coding standards using small modifications to the lossy coding architecture. A simple approach is to skip transform and quantization, and simply entropy code the prediction residual. However, this approach is inefficient at compression. A...

Advanced video coding standards have become widely deployed in numerous products, such as multimedia service, broadcasting, mobile television, video conferences, surveillance systems and so on. New compression techniques are gradually included in video coding standards so that a 50% compression rate reduction is achievable every ten years. However, dramatically increased computational complexit...

This article explores the efficiency of motion-compensated three-dimensional transform coding, a compression scheme that employs a motion-compensated transform for a group of pictures. We investigate this coding scheme experimentally and theoretically. The practical coding scheme employs in temporal direction a wavelet decomposition with motion-compensated lifting steps. Further, we compare the...

Wireless network coding has been shown to reduce the number of transmissions by exploiting the broadcast nature of the wireless medium. Multiple packets may be encoded into a single packet when their respective next hops have enough information to decode them. Previous research has shown that packets belonging to different flows may be encoded (interflow coding) when they are passing through a ...

We consider downlink access point (AP) networks and the corresponding reliable transmission schemes. It is well known that one can protect the network traffic against packet erasures by forward-error-correcting-codes (FEC). In addition to ensuring reliable delivery, FECs could substantially reduce the amount of feedback traffic, which is critical when designing high-performance AP protocols. In...