基于H.264的无再损帧内编码

为了在改进的H.264上实现无再损帧内编码，该文提出了一种新的基于整数线性规划的优化clip算法及改进算法，解决了H.264多次编码中由当前clip模块和帧内预测运算引入的视频畸变问题，并且改进了现有帧内预测算法的代价函数以确保多次编码时后续编码器预测值与前次编码器预测值一致。实验结果显示，与现有帧内编码算法比较，基于整数线性规划理论的帧内编码算法完全消除了现有算法导致的多次编码时的图像降质现象，在改进的H.264编解码算法中实现了严格视频无再损编码。

Re-loss-free Intra-frame Coding Based on H.264

This paper addresses the video distortion of intra-frame coding in multigeneration, which is introduced by the current clip operation and intra-frame prediction. In order to implement the Re-Loss-Free (RLF) intra-frame coding in modified H.264, a novel optimal clipping algorithm based on Integer Linear Programming (ILP) and its improved algorithm are proposed. Furthermore, the cost function of intra-frame prediction is improved to guarantee later encoder the same prediction values with the former. Experimental results show that the ILP-based intra-frame coding method completely eliminates the video degradation and achieves superior performance in comparison with current intra-frame coding method in H.264.