HEVC complexity control method based on coding unit hierarchy and rate distortion cost

Abstract

The invention provides an HEVC complexity control method based on a coding unit hierarchy and rate distortion cost. The HEVC complexity control method comprises steps that a user sets a video coding target complexity coefficient; the complexity of each coding unit hierarchy in the first GOP is counted, the complexity ratio of the coding unit hierarchies is calculated and by combining the different coding unit hierarchies, different thresholds are obtained; and a target complexity is equally distributed in each frame in a to-be-coded GOP, the complexity is equally distributed to coding tree units, the number of two continuous coding unit hierarchies is selected according to the distributed complexity and the number and the position of each coding unit hierarchy is determined. According to the HEVC complexity control method, by considering the coding unit hierarchies and the rate distortion cost, introduction of additional complexity is avoided in the whole method; a special training video sequence is not required; any video can be directly coded; and effective control on the complexity is achieved in a certain range in the GOP level.

Description

technical field [0001] The invention belongs to the field of video information compression, and in particular relates to an HEVC complexity control method based on coding unit levels and rate-distortion costs. Background technique [0002] Now, there is an increasing demand for high-quality and high-definition (4kx2k, 8kx4k resolution) video content. With the rapid expansion of video capacity, there is an urgent need for a video coding technology with higher compression efficiency than H.264 / AVC. JCT-VC, a cooperative organization of ITU-TVCEG (Video Coding Group of ITU Telecommunication Standardization Department) and ISO / IEC MPEG (International Electrotechnical Commission Video Standardization Group of International Organization for Standardization), jointly formulated a new generation of video compression standard HEVC in January 2013. (High Efficiency Video Coding Standard), the goal is to save 50% of the code stream compared with the current best AVC / H.264 standard wit...

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Problems solved by technology

[0007] In view of the defects in the prior art and the requirements of the HEVC complexity control method, the purpose of the present invention is to provide a HEVC complexity control method based on coding unit levels and rate-distortion costs, which not only achieves the purpose of complexity control, but also can achieve better encoding performance

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