摘要： 采用了一种新的叠加字幕的方法,相对于在空间域的方法节约了较大的运算量和存储空间。由于叠加字幕中字形状的非规则性,在压缩域中叠加会出现不希望看到的方框阴影区域,该文采用在压缩域中矩阵的卷积运算来解决这个问题。

关键词: MPEG-2, 字幕, DCT域

Abstract: This paper applies a novel compressed domain approach to insert caption in MPEG video stream. This approach reduces a lot of computing complexity and storage memory comparing to conventional method of decompression-addition-recompression. In order to avoid the presence of undesired semi-transparent region around the caption, a different approach from the usual pixel domain compositing operation is adopted.

中图分类号: 

• TP391.41