Transmission of object based fine-granular-scalability video over networks

Xu-li Shi; Zhi-cheng Jin; Guo-wei Teng; Zhao-yang Zhang; Ping An; Guang Xiao

doi:10.1117/12.665395

12 May 2006 Transmission of object based fine-granular-scalability video over networks

Xu-li Shi, Zhi-cheng Jin, Guo-wei Teng, Zhao-yang Zhang, Ping An, Guang Xiao

Proceedings Volume 6249, Defense Transformation and Network-Centric Systems; 624910 (2006) https://doi.org/10.1117/12.665395
Event: Defense and Security Symposium, 2006, Orlando (Kissimmee), Florida, United States

Abstract

It is a hot focus of current researches in video standards that how to transmit video streams over Internet and wireless networks. One of the key methods is FGS(Fine-Granular-Scalability), which can always adapt to the network bandwidth varying but with some sacrifice of coding efficiency, is supported by MPEG-4. Object-based video coding algorithm has been firstly included in MPEG-4 standard that can be applied in interactive video. However, the real time segmentation of VOP(video object plan) is difficult that limit the application of MPEG-4 standard in interactive video. H.264/AVC is the up-to-date video-coding standard, which enhance compression performance and provision a network-friendly video representation. In this paper, we proposed a new Object Based FGS(OBFGS) coding algorithm embedded in H.264/AVC that is different from that in mpeg-4. After the algorithms optimization for the H.264 encoder, the FGS first finish the base-layer coding. Then extract moving VOP using the base-layer information of motion vectors and DCT coefficients. Sparse motion vector field of p-frame composed of 4*4 blocks, 4*8 blocks and 8*4 blocks in base-layer is interpolated. The DCT coefficient of I-frame is calculated by using information of spatial intra-prediction. After forward projecting each p-frame vector to the immediate adjacent I-frame, the method extracts moving VOPs (video object plan) using a recursion 4*4 block classification process. Only the blocks that belong to the moving VOP in 4*4 block-level accuracy is coded to produce enhancement-layer stream. Experimental results show that our proposed system can obtain high interested VOP quality at the cost of fewer coding efficiency.

Citation Download Citation

Xu-li Shi, Zhi-cheng Jin, Guo-wei Teng, Zhao-yang Zhang, Ping An, and Guang Xiao "Transmission of object based fine-granular-scalability video over networks", Proc. SPIE 6249, Defense Transformation and Network-Centric Systems, 624910 (12 May 2006); https://doi.org/10.1117/12.665395

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KEYWORDS

Computer programming

Video

Video coding

Video compression

Standards development

Image enhancement

Motion estimation

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