By Wen Gao, Siwei Ma
This booklet offers an summary of the state-of-the-art in video coding expertise. in particular, it introduces the instruments of the AVS2 usual, describing how AVS2 will help to accomplish an important development in coding potency for destiny video networks and purposes by means of incorporating smarter coding instruments similar to scene video coding. good points: introduces the elemental suggestions in video coding, and provides a brief heritage of video coding know-how and criteria; experiences the coding framework, major coding instruments, and syntax constitution of AVS2; describes the most important applied sciences utilized in the AVS2 ordinary, together with prediction coding, remodel coding, entropy coding, and loop-filters; examines effective instruments for scene video coding and surveillance video, and the main points of a promising clever video coding approach; discusses optimization applied sciences in video coding structures; presents a evaluation of picture, video, and 3D content material caliber evaluation algorithms; surveys the recent learn themes in video compression.
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Additional info for Advanced Video Coding Systems
5. They are searched in a pre-defined order F, G, C, A, B, D, and the selected neighboring block is signaled in the bitstream. Fig. 4 Left temporal multi-hypothesis mode; Right spatial multi-hypothesis mode 40 3 An Overview of AVS2 Standard Fig. 3 Motion Vector Prediction and Coding Motion vector prediction (MVP) plays an important role in inter prediction, which can reduce the redundancy among motion vectors of neighboring blocks and thus save large numbers of coding bits for motion vectors. 1).
In the sequence, each coded picture starts with a picture header, and is ordered accordingly in the bitstream. The order of these pictures in the bitstream is the same 46 3 An Overview of AVS2 Standard as one in decoding, but it can be different from display order, which is related with the picture coding type. In AVS2, four types of pictures are defined: • Intra picture (I-picture): only intra prediction is used in the picture. • Forward inter picture (P-picture): both intra prediction and inter prediction can be used, but only forward prediction is used in inter prediction.
Instead of continuous scan lines, each picture of the video consists of a raster of discrete samples, called pixels. Assuming the picture has a width of W pixels and a height of H pixels, we say the video has the spatial resolution of W × H. The frame rate of the video is also called as temporal resolution. 25 Mbits/s. It can be seen that after digitalization the high volume of video data is challenging for storage and transmission of digital video. Thus high efficiency video compression is necessary, and how to achieve efficient coding becomes very important for the real applications, which is also what we will talk about in this book.