Efficient intra mode decision for low complexity HEVC screen content compression

Qiuwen Zhang; Yongbo Zhao; Weiwei Zhang; Lijun Sun; Rijian Su

doi:10.1371/journal.pone.0226900

Efficient intra mode decision for low complexity HEVC screen content compression

PLoS One. 2019 Dec 31;14(12):e0226900. doi: 10.1371/journal.pone.0226900. eCollection 2019.

Authors

Qiuwen Zhang¹, Yongbo Zhao¹, Weiwei Zhang¹, Lijun Sun², Rijian Su¹

Affiliations

¹ College of Computer and Communication Engineering, Zhengzhou University of Light Industry, Zhengzhou, Henan, China.
² School of Electrical Engineering, Henan University of Technology, Zhengzhou, Henan, China.

Abstract

High efficiency video coding screen content coding (HEVC-SCC) extension is the latest HEVC development to improve the compression performance of screen content (SC) video. Similar to HEVC, the intra mode selection in HEVC-SCC is performed all the coding unit (CU) partitions to find the least rate distortion (RD) cost. Furthermore, additional intra tools are introduced to improve HEVC-SCC coding efficiency. However, these new tools could cause high computation complexity which restricts HEVC-SCC from ongoing applications. To solve the problem, an efficient intra mode decision for HEVC-SCC that adaptively utilizes the texture complexity of SC treeblock is proposed. The texture complexity of a SC treeblock is first analyzed according to the variation degree of the luminance value. And then, two efficient approaches are proposed based on the constructed model, which are early CU depth level determination and adaptive intra mode selection. Experimental results demonstrate that the proposed method can save 48.5% encoder runtime while keeping nearly the same coding efficiency as the HEVC-SCC encoders.

Publication types

Research Support, Non-U.S. Gov't

MeSH terms

Algorithms*
Data Compression / methods*
Decision Theory*
Video Recording / methods*
Wireless Technology

Grants and funding

This work was supported in part by the National Natural Science Foundation of China No.61771432, 61302118, 61773018, 61702464, 61803346 and U1604151, Scientific Project of Henan No. 182102210156, Innovation Talents of Henan No. 17HASTIT022.