满足了在视频上叠加额外信息的需要，进一步扩展了多媒体播放系统的系统功能。
When playing video in the client, we can selectively superimpose the image to the video as we wish to add additional information on the further expand of multi-media system.
视频图像叠加是多媒体技术应用领域之一，是电视技术与计算机技术结合的产物。
The video image-overlapping is one of the multimedia technology applications, and it is the result that the technology of the TV combined with the technology of the computer.
最后开发了一个多媒体播放器，播放多媒体文件，并实现了字幕叠加。
Finally, develop a simple multi-media player, play media files, and the superposition of the subtitles.
最后开发了一个多媒体播放器，播放多媒体文件，并实现了字幕叠加。
Finally, develop a simple multi-media player, play media files, and the superposition of the subtitles.
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