Syncword
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In computing a syncword is used to synchronize data. For example an audio receiver is receiving a bit stream of data. It needs to know where the header information starts. In computing a predefined syncword is used to indicate the start of data. An example of a syncword is 0x0B77 for an AC-3 encoded stream.
Various techniques are used to "disguise" bytes of data at the data link layer that might otherwise be (incorrectly) recognized as the sync word. For example, HDLC uses bit stuffing or "octet stuffing", while other systems use ASCII armor.
