A macroblock level adaptive search range algorithm for variable block size motion estimation in H.264/AVC

Zhenxing Chen, Yang Song, Takeshi Ikenaga, Satoshi Goto

研究成果: Conference contribution

14 被引用数 (Scopus)

抄録

Compared with previous video standards, the computational complexity of H.264/AVC is extraordinarily high due to newly adopted tools such as variable block size motion estimation (VBSME). In VBSME, to each macroblock (MB) there are at all 41 blocks corresponded. These 41 blocks are sized from 4×4 through 16×16. As each block of these 41 blocks accounts for one independent search window (SW), thus to each MB there exist 41 SWs corresponded. In the other hand, adaptive search range (ASR) algorithms are defined as algorithms which adaptively adjust the search ranges (SRs) and hence result in dynamically reduced SWs. While considering whether 41 SWs got changed in the same way or not, "macroblock level ASR (MB-ASR) algorithms" are defined as algorithms which adaptively change the search range all-in-once and hence result in the 41 SWs got changed in the same way. "41 blocks level ASR (block-ASR) algorithms" are defined as algorithms that the changing ways of the SRs are specific to each block of the 41 blocks. Since in MB-ASR algorithms for each MB the SR is changed in same way, it is reasonable to consider that the control overhead of MB-ASR is less than that of block-ASR. In this paper, a MB-ASR algorithm is proposed and assessed from being compared with a previously proposed block-ASR algorithm given in [5]. According to experimental results, it is proved the proposed algorithm provides almost the same encoding quality and even a little better SW reducing efficiency (SW-RE) while compared with [5]. Meanwhile, as a MB-ASR one, the proposed algorithm is considered having less control overhead than block-ASR one-[5].

本文言語English
ホスト出版物のタイトル2007 International Symposium on Intelligent Signal Processing and Communications Systems, ISPACS 2007 - Proceedings
出版社Institute of Electrical and Electronics Engineers Inc.
ページ598-601
ページ数4
ISBN(印刷版)9781424414475
DOI
出版ステータスPublished - 2007 1 1
イベント2007 International Symposium on Intelligent Signal Processing and Communications Systems, ISPACS 2007 - Xiamen, China
継続期間: 2007 11 282007 12 1

出版物シリーズ

名前2007 International Symposium on Intelligent Signal Processing and Communications Systems, ISPACS 2007 - Proceedings

Conference

Conference2007 International Symposium on Intelligent Signal Processing and Communications Systems, ISPACS 2007
CountryChina
CityXiamen
Period07/11/2807/12/1

ASJC Scopus subject areas

  • Computer Science Applications
  • Signal Processing
  • Software
  • Electrical and Electronic Engineering
  • Mathematics(all)

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