华侨大学学报（自然科学版）
華僑大學學報（自然科學版）
화교대학학보（자연과학판）
JOURNAL OF HUAQIAO UNIVERSITY(NATURAL SCIENCE)
2015年
1期
23-28
,共6页
高效率视频编码%深度%二维直方图%快速模式选择%编码单元%灰度直方图
高效率視頻編碼%深度%二維直方圖%快速模式選擇%編碼單元%灰度直方圖
고효솔시빈편마%심도%이유직방도%쾌속모식선택%편마단원%회도직방도
high efficiency video coding%depth%two-dimensional histogram%fast mode decision%coding unit%gray histo-gram
针对高效率视频编码（HEVC）帧内预测高额的计算复杂度，提出一种基于二维直方图的快速深度决策算法．首先，对当前最大编码单元（LCU）采用3×3矩阵进行滤波；然后，分别统计原始 LCU 以及滤波后LCU 的像素分布，生成二维灰度直方图．通过该二维直方图所表征的纹理特征，进行深度的自适应选择，减少不必要的深度计算．实验结果表明：同原始 HM10．1相比，文中提出的算法可以节省编码时间21．6％，同时保证视频质量几乎不变．
針對高效率視頻編碼（HEVC）幀內預測高額的計算複雜度，提齣一種基于二維直方圖的快速深度決策算法．首先，對噹前最大編碼單元（LCU）採用3×3矩陣進行濾波；然後，分彆統計原始 LCU 以及濾波後LCU 的像素分佈，生成二維灰度直方圖．通過該二維直方圖所錶徵的紋理特徵，進行深度的自適應選擇，減少不必要的深度計算．實驗結果錶明：同原始 HM10．1相比，文中提齣的算法可以節省編碼時間21．6％，同時保證視頻質量幾乎不變．
침대고효솔시빈편마（HEVC）정내예측고액적계산복잡도，제출일충기우이유직방도적쾌속심도결책산법．수선，대당전최대편마단원（LCU）채용3×3구진진행려파；연후，분별통계원시 LCU 이급려파후LCU 적상소분포，생성이유회도직방도．통과해이유직방도소표정적문리특정，진행심도적자괄응선택，감소불필요적심도계산．실험결과표명：동원시 HM10．1상비，문중제출적산법가이절성편마시간21．6％，동시보증시빈질량궤호불변．
In order to further reduce the great computational complexity for high efficiency video coding (HEVC)intra coding prediction high cost case,a fast depth decision algorithm based on two-dimensional histogram has been proposed in this paper.First,a 3×3 matrix is used to filter the current largest coding unit (LCU).Then,a two-dimensional histo-gram which is based on the distribution of gray values of the original LCU and the filtered LCU can be generated.By u-sing the two-dimensional histogram,some of the depth levels which are unnecessary can be skipped.Experimental results show that the proposed algorithm can save 21.6% of the encoding time on average with negligible loss of coding efficiency compared with the original HM10.1.
