2021 IEEE International Conference on Image Processing

19-22 September 2021 • Anchorage, Alaska, USA

Imaging Without Borders

2021 IEEE International Conference on Image Processing

19-22 September 2021 • Anchorage, Alaska, USA

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Paper Detail

Paper IDCOM-3.2
Paper Title Implicit seleted transform skip method for AVS3
Authors Yuhuai Zhang, Peking University, China; Kai Zhang, Li Zhang, Hongbin Liu, Yue Wang, Bytedance Inc., United States; Siwei Ma, Wen Gao, Peking University, China
SessionCOM-3: Image and Video Communications
LocationArea H
Session Time:Tuesday, 21 September, 13:30 - 15:00
Presentation Time:Tuesday, 21 September, 13:30 - 15:00
Presentation Poster
Topic Image and Video Communications: Lossy coding of images & video
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Abstract AVS3 is an emerging video coding standard, and screen content coding is a very important feature of AVS3. This paper presents a method of Implicit-Selected Transform Skip (ISTS) to further improve the screen content coding performance. With ISTS, transform skip mode is introduced as an optional substitution to transform-coding on residual signals of blocks with intra-prediction. The indication of whether to apply transform skip is hidden into the Parity of the Number of Non-zero Coefficients (PNNC) of a residual block, instead of being signaled to the decoder. Moreover, the coefficients of an intra-coded block are reordered to make the coefficients more compact. Experimental results show that the proposed method can achieve 12.04%, 8.15% and 10.19% BD-rate savings on average under All Intra (AI), Low Delay (LD) and Random Access (RA) configurations, respectively, with the encoding time reduced by 5% to 8%. ISTS has been adopted into AVS3.