HEVC code rate control method based on human vision region importance analysis

• Main Authors: LIN HONGWEI, DENG KEYAN, WANG JIANHUA, WU TAO, LI XIANGQUN, GAO MINGLIANG
• Format: Patent
• Language: Chinese; English
• Published: 24.07.2020
• Subjects: ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; PICTORIAL COMMUNICATION, e.g. TELEVISION

The invention provides an HEVC code rate control method based on human vision region importance analysis. A video inter-frame brightness difference value is used as a measurement mode of human eye vision time domain importance of each frame; according to the method, the spatial domain importance degree of the human vision of the current frame is measured by utilizing mean square gradient consistency calculation, and then a new regional level bit allocation method is provided by utilizing the proposed perception importance degree model so as to keep the balance of video quality. An LCU-level bit allocation scheme is then designed to obtain a target bit for each LCU. In order to obtain a more accurate bit rate, an improved R-lambda parameter updating model is used. According to the method, the final coding actual code rate can better meet the given target code rate. Meanwhile, the actual bit tends to be stable, and the human eye perception quality of the coded video is obviously improved. 本发明提出一种基于人眼视觉区域重要性分析的H