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Fine scalable video coding technology research

Author: LiZhanLin
Tutor: LinQiWei
School: Huaqiao University
Course: Signal and Information Processing
Keywords: H.264 FGS Bit-plane coding Color choose Water ring scan
CLC: TN919.81
Type: Master's thesis
Year: 2008
Downloads: 48
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Abstract


With the development of video coding technology and a series of video coding standards were introduced, video encoding technology applied in many fields, traditional video coding technology-oriented storage field, however, is mainly to solve is how to improve the coding efficiency. With the continuous development of the Internet and multimedia technology in recent years, people increasingly wide range of network-based video transmission needs, how to adapt to a network transmission stream has become a key issue in the video encoding. Accordingly, an object of the video coding has been compressed by the previous simple improve steering improve compression efficiency and adaptation of both network transmission efficiency. Fine scalable video coding (FGS), can effectively solve the large amount of data exists in the network video bandwidth change and loss issues, video coding scheme is regarded as a promising network environment. This work is mainly aimed at the lower disadvantage FGS coding efficiency, the premise of fine granularity scalability characteristics, research to improve the coding efficiency. The paper first introduces the basic ideas and key technologies for video compression, and briefly the course of development of video coding standards, and a variety of standard features, especially some of the key technologies in H.264. After summarizes a variety of scalable coding principle, methods and improvement strategies, especially fine scalable video encoding method and program for its various improvements. H.264 encoding with MPEG-4 FGS coding In this paper, based on the combination of a new the FGS coding methods - H.264 coding standard H.264-based FGS coding as the base layer of the program MPEG-4 FGS enhancement layer as an enhancement layer of the program, so that both with the H.264 high compression rate, but also has the FGS of fine gradation characteristic. The experiments show that, compared to the MPEG-4 FGS, this method significantly improved coding efficiency, improve the subjective and objective quality of the video image. After that, the paper also proposed two new FGS enhancement algorithms - water ring scan algorithm and color enhancement algorithms, respectively, to enhance regional water ring center and color area. The experiments show that the water ring scanning algorithm in coding complexity does not increase and not reduce the quality of the images premise, significantly improve the quality of the central area of ??the water ring enhanced algorithm is appropriate to reduce the entire frame image color options significantly enhance the quality of the conditions, the visual quality of the skin color area.

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CLC: > Industrial Technology > Radio electronics, telecommunications technology > Communicate > Image communication, multimedia communication > Image coding
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