现在很多的宣称具有MPEG4压缩格式的监视产品，都只是在视频存储阶段采用软件实现视频流格式的转换。
But there are many products which assert using the style of MPEG4 only apply it to transit the other format of video picture to MPEG4 format in the video stores phase.
本文介绍了模拟视频模块的硬件框架和基本硬件设计，并详细描述了模拟视频转换模块的软件实现以及性能优化措施。
The hardware framework and design of the analog display module is presented, as well as software solutions and the measures to optimize its performances.
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