基于块方向预测的AV1快速帧内编码算法

doi:10.13229/j.cnki.jdxbgxb.20240173

Abstract

Abstract:

AV1 compression technology increases encoding complexity. In order to meet the requirements of real-time communication （RTC） applications， encoders need to run at low latency， low bit rate， and low encoding time on low-end platforms， which makes using AV1 encoders challenging in RTC tasks. In this regard， this article proposes an AV1 fast intra frame encoding algorithm. By pre calculating the directional characteristics of blocks， during the intra frame encoding direction prediction traversal， significantly different directions from the pre calculated direction are skipped， thereby improving the encoding speed of the libaom-AV1 encoder， saving intra frame encoding time， and accelerating the progress of AV1 in low latency video encoding applications. The experimental results show that the algorithm can save 25.89% of running time， and after saving encoding time， the loss of encoding performance is relatively small.

Key words: AV1, libaom, real-time encoding, intra encoding speed optimization

CLC Number:

TP312

Li-min YAN,Wei-ye JIN. Fast algorithm based on block direction prediction for AV1 intra encoding[J].Journal of Jilin University(Engineering and Technology Edition), 2025, 55(3): 993-1000.

Figures/Tables 10

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References 12

1	Akyazi P, Ebrahimi T. Comparison of compression efficiency between HEVC/H.265,VP9 and AV1 based on subjective quality assessments[J/OL]. [2024-01-28].
2	Wiegand T, Sullivan G J, Bjontegaard G, et al. Overview of the H.264/AVC video coding standard[J]. IEEE Transactions on Circuits and Systems for Video Technology, 2003, 13(7): 560-576.
3	Han J, Li B, Mukherjee D, et al. A technical overview of AV1[J]. Proceedings of the IEEE, 2021, 109(9): 1435-1462.
4	Jeong J, Gankhuyag G, Kim Y H. Fast chroma prediction mode decision based on luma prediction mode for AV1 intra coding[C]∥International Conference on Information and Communication Technology Convergence (ICTC),Jeju, Korea (South),2019: 1050-1052.
5	Corrêa M, Zatt B, Palomino D, et al. A fast local mode decision for the HEVC intra prediction based on direction detection[J/OL]. [2024-01-28].
6	Xu M, Jeon B. Selection of intra prediction tools for fast AV1 encoding[C]∥IEEE International Symposium on Broadband Multimedia Systems and Broadcasting (BMSB),Paris, France, 2020: No.9379847.
7	Zhao X, Zhao L, Krishnan M, et al. Study on coding tools beyond AV1[C]∥IEEE International Conference on Multimedia and Expo (ICME),Shenzhen, China, 2021: No.9428244.
8	Bross B, Wang Y K, Ye Y, et al. Overview of the versatile video coding (VVC) standard and its applications[J]. IEEE Transactions on Circuits and Systems for Video Technology, 2021, 31(10): 3736-3764.
9	Chen Y, Murherjee D, Han J, et al. An overview of core coding tools in the AV1 video codec[C]∥2018 Picture Coding Symposium (PCS),San Francisco, USA, 2018: 41-45.
10	Zhao L, Zhao X, Liu S. Improved intra coding beyond AV1 using adaptive prediction angles and reference lines[C]∥IEEE International Conference on Image Processing (ICIP),Abu Dhabi, United Arab Emirates,2020: 3408-3412.
11	Li J, Li B, Xu J, et al. Efficient multiple-line-based intra prediction for HEVC[J]. IEEE Transactions on Circuits and Systems for Video Technology, 2016, 28(4): 947-957.
12	Bjontegaard G. Calculation of average PSNR differences between RD-curves[R].Geneva: ITU SG16 Doc. VCEG-M33, 2001.

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分辨率	序列名称	原编码时间/s	优化后编码耗时/s	TS/%	BD-rate损失/%
416×240	BasketballPass	22.49	15.15	32.64	0.47
	BlowingBubbles	29.74	20.34	31.61	0.33
	BQSquare	23.24	17.28	25.65	0.37
	RaceHorses1	23.48	16.68	28.96	0.40
832×480	BasketballDrillText	87.73	67.28	23.31	0.18
	BasketballDrill	79.89	61.33	23.23	0.61
	BQMall	90.61	63.15	30.31	0.40
	PartyScene	96.33	77.24	19.82	0.36
	RaceHorses2	83.40	62.69	24.83	0.34
1 024×768	ChinaSpeed	86.96	70.17	19.31	0.17
1 280×720	SlideEditing	105.87	87.84	17.03	0.06
1 280×720	SlideShow	50.89	40.38	20.65	0.32
1 920×1 080	BasketballDrive	350.95	268.02	23.63	0.24
	BQTerrace	368.42	303.56	17.60	0.31
	Cactus	524.32	370.92	29.26	0.25
	Kimono1	383.74	257.10	33.00	0.11
	ParkScene	508.43	354.90	30.20	0.14
	vidyo4	120.18	87.70	27.03	0.38
2 560×1 600	PeopleOnStreet	723.64	509.90	29.54	0.30
2 560×1 600	Traffic	805.04	560.62	30.36	0.25

算法	TS/%	BD-rate损失/%
文献［4］	15.86	0.44
文献［5］	8.67	0.04
本文	25.89	0.29

Fast algorithm based on block direction prediction for AV1 intra encoding

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