采用VC、VB等可视化编程工具，开发一个具有视频播放功能的程序也要花费程序员的大量时间。

Although using such visual programming tools as VB and VC, programmers will spend plenty of time developing a program with video playing function.

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很快的，乔布斯升级了iPod，更新、更棒的款式，增加了在线商店，Windows支持，还有视频播放功能。

Quickly and ruthlessly, Jobs updated the iPod with ever newer and better models, adding an online store, Windows compatibility, and then video.

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基本实现了多媒体模块的视频播放功能，在此基础上提出了通过EP9315上的GPIO口控制混合电路模块的视频信号切换功能方案。

After finishing Multimedia player function, I bring forward the scheme in control of video signal switch through GPIO pins in EP9315.

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