计算机工程与应用 ›› 2014, Vol. 50 ›› Issue (5): 151-155.

• 图形图像处理 • 上一篇    下一篇

用于移动终端的低复杂度快速模式选择算法

金智鹏1,郁  梅2   

  1. 1.嘉兴职业技术学院 信息技术分院,浙江 嘉兴 314036
    2.宁波大学 信息科学与工程学院,浙江 宁波 315211
  • 出版日期:2014-03-01 发布日期:2015-05-12

Low complexity fast mode decision algorithm for mobile terminals

JIN Zhipeng1, YU Mei2   

  1. 1.Information Technology Branch Institute, Jiaxing Vocational Technical College, Jiaxing, Zhejiang 314036, China
    2.School of Information Science and Engineering, Ningbo University, Ningbo, Zhejiang 315211, China
  • Online:2014-03-01 Published:2015-05-12

摘要: 针对移动终端硬件计算能力不足的问题,提出了一种高性能、低复杂度的帧间快速模式选择算法。根据4×4整数DCT变换的特点,提出了一种基于全零块检测的运动估计提前中止策略;并针对H.264多模式预测编码的特点,进一步将宏块的全零块检测作为帧间编码模式快速选择的依据。实验测试表明,该算法可以在不损失率失真性能的情况下,有效降低H.264编码计算量,平均能降低31.84%的编码时间,最大能降低63.82%的编码时间。

关键词: 移动终端, H.264, 全零块检测, 模式选择, 提前终止

Abstract: According to the calculation shortage of mobile terminal, a fast inter-frame mode decision algorithm which has high-performance and low-complexity is proposed. According to the characteristics of the 4×4 integer DCT transform, an early termination strategy of motion estimation based on all-zero block detection is proposed. Furthermore, the all-zero macroblock detection is applied to the H.264 fast mode selection. The experimental results show that the proposed algorithm can effectively reduce the H.264 encoding computation. It can accelerate the encoding speed to 31.84%, the biggest can reduce encoding time by 63.82%, while in keeping with the rate distortion performance basically unchanged.

Key words: mobile terminals, H.264, all-zero block detection, mode selection, early termination