这里您将创建一个基本的PHP编码器对象，当您将它转换成一个字符串时(例如，通过使用PHP echo语句进行处理)，它会表示一个Activity Streams订阅源。
Here you'll create a basic PHP encoder object that represents an Activity Streams feed when you convert it to a string (for example, by using the PHP echo statement with it).
文中介绍了MPEG - 4音频编码器的构成，并详细说明了其中几种主要编码器的基本原理。
The configuration of MPEG-4 audio encoder is introduced in this paper. Severalimportant main encoders are described in detail.
该文阐述了音频压缩编码器的系统构成及基本原理，并且详细地的说明了硬件电路设计思想及相关时序波形的分析。
Not only the system architecture and basic principle are described in this paper, but also the design ideas are proposed and timing sequence of hardware is analyzed in detail.
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