As {HEAD ~ a result} of {TAIL ~ detection} by the known code portion detecting unit, the decoder unit decodes the coded data received by the receive unit when there is no known code portion the decoder unit decodes the coded data that was replaced by the first substitution unit when there is the known code portion 
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As { HEAD ~ a result } of { TAIL ~ detection } by the known code portion detecting unit , the decoder unit decodes the coded data received by the receive unit when there is no known code portion the decoder unit decodes the coded data that was replaced by the first substitution unit when there is the known code portion
OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH