首页> 外文期刊>Journal of visual communication & image representation >Rate-distortion optimized layered coding of high dynamic range videos
【24h】

Rate-distortion optimized layered coding of high dynamic range videos

机译:高动态范围视频的速率失真优化分层编码

获取原文
获取原文并翻译 | 示例
           

摘要

An efficient algorithm to compress high dynamic range (HDR) videos into layered bitstreams is proposed in this work. First, we separate an HDR video sequence into a tone-mapped low dynamic range (LDR) sequence and a ratio sequence, which represents ratios between HDR and LDR pixel values. Then, we encode the LDR and ratio sequences to maximize the rate-distortion (R-D) performance by extending the standard H.264/AVC codec. Specifically, we estimate the distortion of the HDR sequence from those of the LDR sequence and the ratio sequence, and then allocate a limited bit budget to the LDR sequence and the ratio sequence efficiently to maximize the qualities of both LDR and HDR sequences. Conventional LDR devices use only the LDR stream, whereas HDR devices reconstruct the HDR video from the LDR and ratio streams. Simulation results show that the proposed algorithm provides significantly better R-D performance than conventional HDR video coding techniques.
机译:在这项工作中,提出了一种将高动态范围(HDR)视频压缩为分层比特流的有效算法。首先,我们将HDR视频序列分为色调映射的低动态范围(LDR)序列和比率序列,该序列表示HDR和LDR像素值之间的比率。然后,我们通过扩展标准H.264 / AVC编解码器对LDR和比率序列进行编码,以最大化速率失真(R-D)性能。具体而言,我们从LDR序列和比率序列的失真估计HDR序列的失真,然后有效地为LDR序列和比率序列分配有限的比特预算,以最大化LDR和HDR序列的质量。传统的LDR设备仅使用LDR流,而HDR设备则从LDR和比率流中重建HDR视频。仿真结果表明,与传统的HDR视频编码技术相比,该算法具有更好的R-D性能。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号