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Abstract

An expander (13) expands lines of compressed received data. Each line of compressed data includes data bits followed by fill bits. A sync code follows each compressed line. A memory (14), (16) stores a previous line of expanded data and a current line of expanded data. In response to detection of the sync code corresponding to the previous line of data, the current line of data is stored in the memory while the previous line of data is fed out to a printer (53), (56). Detection of the sync code is inhibited while the previous line of data is being fed out, the feeding out of the previous line of data occuring during the same period of time the current line is being stored. In this manner, fill bits which were converted into a sync code by a transmission error or the like are prevented from being erroneously detected as a true sync code.

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First Claim