在提取过程中，通过对同步码的解码来定位水印信号嵌入的帧位置以及数据起始位置。
In the extract process, through the decoding of the synchronization code to locate the position of the watermark signal embedded in the frame as well as data starting position.
同步 信号是一个字节序列，它是帧起始部分的识别标志。
The preamble is a sequence of bytes that identifies the beginning of a frame.
同步 信号是一个字节序列，它是帧起始部分的识别标志。
The preamble is a sequence of bytes that identifies the beginning of a frame.
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