摘要
介绍了DCT域转码的原理,并提出了在DCT域进行转码的一种算法,主要包括在DCT域中进行运动补偿,降低空间分辨率以及运动矢量的重新估计和选择宏块编码模式的算法。
This paper first introduces the theory of transcoding in DCT domain and then presents an algorithm of transcoding in DCT domain. The algorithm mainly includes how to motion compensate in DCT domain, how to downscale spatial resolution and how to re-estimate motion vector and decide macro block coding mode.
出处
《北京广播学院学报（自然科学版）》
2004年第2期20-23,共4页
Journal of Beijing Broadcasting Institute(Science and Technology)
