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为了降低高性能视频编码(HEVC)帧内编码的计算复杂度,在其四叉树编码结构的基础上,提出了一种根据平滑区域检测结果跳过子块划分的帧内编码快速算法.首先,通过统计多种不同内容的视频在不同量化参数下最终选取的编码块尺寸的分布,分析了图像平滑特性与编码块尺寸大小的关系;进而根据当前已编码预测单元的编码信息,对当前区域是否属于平滑区域进行检测,根据检测结果自适应地跳过不适合此纹理特性编码块划分的编码过程.在最新的HM4.0平台上的实验结果表明,在相同的重建图像峰值信噪比下,所提算法在低复杂度和高性能标的准测试条件下,编码时间分别减少了24.8%和18.6%,而码率分别只有0.44%和0.12%的细微增加.
In order to reduce the computational complexity of high-performance video coding (HEVC) intra-frame coding, a fast intra-frame coding algorithm based on the quadtree coding structure is proposed, which skips sub-block partitioning based on the result of smooth area detection. , The relationship between the image smoothing feature and the size of the coding block is analyzed by counting the distribution of the size of the coding block finally selected under different quantization parameters for the video of multiple different contents. Based on the coding information of the currently coded prediction unit, the current region Whether it belongs to the smooth area to detect, according to the test results adaptively skip inappropriate coding for this texture feature coding block partitioning.Experimental results on the latest HM4.0 platform show that under the same reconstruction peak signal to noise ratio , The proposed algorithm reduces the encoding time by 24.8% and 18.6%, respectively, while the code rates are only slightly increased by 0.44% and 0.12%, respectively, under the condition of low complexity and high performance.