Thanks to that, and undoubtedly the knowledge that most owners were using it for streaming, Apple removed the hard drive from the device, and cut it down in size and price.

苹果也意识到了大家都在使用流媒体播放内容，因此他们在新版的Apple TV中去掉了硬盘，减少了体积也降低了价格。

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In the second chapter and third chapter, the knowledge of the streaming media technology and the embedded system technology was given, which is the fundamental for system coding implementation.

本文的第二章、第三章对流媒体技术和嵌入式系统的相关知识进行了分析研究，为后续系统的代码实现打下理论基础。

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