利用可調式TILE邊界改善高效率視訊編碼之負載平衡及編碼效能

Improve Load-balancing and Coding Efficiency in HEVC by using Adaptive Tile Boundary

凃俊全(Chun-Chuan Tu)

指導教授 ： 蔡文錦

國立交通大學/資訊學院/資訊科學與工程研究所/碩士(2014年)

https://doi.org/10.6842/NCTU.2014.00844

摘要

Tile 是高效率視頻編碼 (HEVC) 實行平行化的一個工具。在設計上，tile可以高度平行化編碼及解碼的程序。然而tile的使用也存在著一些議題，使用tile會造成編碼效率降低，或者當tile分佈不均時會有較差的平衡負載，造成平行化效率降低。
在本論文中，我們提出了三種方法來解決這些問題。其中兩種方法分別改善了編碼效率降低以及使編碼有更好的平衡負載，第三種方法則嘗試在較好的平衡負載狀況下改善編碼效率。實驗結果顯示，這三種方法也確實達到了目的。
關鍵字：高效率視頻編碼、tile、平行化、平衡負載

關鍵字

高效率 視頻編碼 ； 平行化 ； 平衡負載 ； Tile

並列摘要

Tile is a parallel tool in High Efficiency Video Coding (HEVC). It can achieve high coding parallelism in both encoding and decoding process. However, there are some issues when using tile. First, using tile will decrease coding efficiency. In addition, it might lead to bad parallelism if unbalanced tile spacing is adopted.
In this thesis, we proposed three methods to solve these issues. Two of them are the improvement of coding efficiency and improve load-balancing, respectively. The other one takes both coding efficiency and load-balancing into considerations. The experiment results show that these methods achieve their goals.

並列關鍵字

High Efficiency video coding ； Parallel ； Load-balancing ； Tile

參考文獻

[1] Mahsa T. Pourazad, Colin Doutre, Maryam Azimi, and Panos Nasiopoulos, "HEVC: The New Gold Standard for Video Compression: How Does HEVC Compare with H.264/AVC," Consumer Electronics Magazine, IEEE, vol. 1, pp. 36 - 46, July 2012.

[5] S. O. B. B. S. M. Philipp Helle, "Block Merging for Quadtree-Based Partitioning in HEVC," IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS FOR VIDEO TECHNOLOGY, 12 2012.

[6] C. Blumenberg, D. Palomino and S. Bampi, "Adaptive Content-Based Tile Partitioning Algorithm," in Picture Coding Symposium (PCS), 2013.

[2] Gary J. Sullivan, Jens-Rainer Ohm, Woo-Jin Han and Thomas Wiegand, "Overview of the High Efficiency Video Coding," Circuits and Systems for Video Technology, IEEE Transactions on, pp. 1649 - 1668, Dec. 2012.

[3] K. Misra, A. Segall, M. Horowitz and S. Xu, "An overview of tiles in HEVC," in J-STSP, 2013.