A Robust Hierarchical Qp Setting for Screen Content Coding

Unlike conventional camera-captured videos (CCV), the screen content videos (SCV) are generated by computer, like text, animation, or graphics. The video contents are discontinuous, as one abrupt frame is often followed by many static frames. Therefore, the traditional hierarchical quantization para...

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Bibliographic Details
Main Authors: Tang, Tong, Li, Ling, Wang, Donglin
Format: Conference Proceeding
Language:English
Subjects:
Bit rate
Complexity theory
Encoding
Hierarchical QP
High Efficiency Video Coding (HEVC)
Layout
Quantization (signal)
Robustness
Screen content
Videos
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Description
Summary:Unlike conventional camera-captured videos (CCV), the screen content videos (SCV) are generated by computer, like text, animation, or graphics. The video contents are discontinuous, as one abrupt frame is often followed by many static frames. Therefore, the traditional hierarchical quantization parameter (QP) setting for CCV may not be suitable for SCV. In this paper, a robust hierarchical QP setting method is proposed. Concretely, a region recognition method is designed to identify the influential regions, whose quality has tremendous influence on subsequent frames. These influential regions employ a smaller QP to improve the RD (Rate Distortion) performance of encoded video. Experimental results show that the proposed method averagely reduces 1.7% bitrate, and improves RD performance for all the SCV, which outperforms other encoding methods.
ISSN:2379-190X
DOI:10.1109/ICASSP.2018.8462625