H.264并行编码中负载平衡方法

侯兴松; 刘大齐; 盛凯; 顿玉洁

doi:10.11834/jig.20120803

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专辑

H.264并行编码中负载平衡方法
Load balancing for H.264 parallel encoding
2012年17卷第8期页码：911-918
纸质出版：2012
DOI： 10.11834/jig.20120803
稿件说明：

移动端阅览

侯兴松, 刘大齐, 盛凯, 顿玉洁. H.264并行编码中负载平衡方法[J]. 中国图象图形学报, 2012,17(8):911-918. DOI： 10.11834/jig.20120803.

Hou Xingsong, Liu Daqi, Sheng Kai, Dun Yujie. Load balancing for H.264 parallel encoding[J]. Journal of Image and Graphics, 2012, 17(8): 911-918. DOI： 10.11834/jig.20120803.

摘要

针对在多核处理器上Slice并行编码H.264高清视频中的负载不平衡问题

首先利用已编码帧的编码统计信息

根据帧间时间相关性预测下一帧各宏块的编码负载

然后据此预测的编码负载划分Slice

使各个处理器核上编码的Slice具有相接近的计算负载

从而达到动态负载平衡目的。在Tile64多核平台上的实际测试结果表明

与传统的基于宏块区域的动态数据分配算法相比

该方法可以将编码并行加速比和并行效率提高5%左右。

Abstract

To reduce the load imbalancing problem of the slice parallel of H.264 encoding for high-definition videos with multicore processors

we firstly

predict the encoding load of each MB in the current frame based on the temporal dependence with the previous encoded frame statistics. Then the current frame is divided into slices with the predicted encoding load

so that each processor core has the relative similar computation load for each slice. Experiments using the Tile64 multicore processor platform show that it can increase the parallel encoding speedup and efficiency by about 5% with this method

when compared with the dynamic data partition algorithm based on macroblock regions.