In handling the encoded symbols, it is necessary to accomplish parallel to serial conversion, in the sense that a parallel encoded format must be converted to a serial bit stream for shifting onto a given recording channel. For example, with GCR encoding, a number of parallel internal bits such as a byte (8 bits) are usually encoded into a larger number of parallel bits, required to meet constraints imposed by the channel characteristics when tape is the recording media or multiple recording channels are usually employed. This is also true with communications systems. In digital recording channels of the form utilized with magnetic storage media, such as disk and tape, it is common to encode data internal to the system into particular symbol form to accommodate characteristics of the channels of the system. The present invention relates to digital recording channel electronics, and particularly to parallel to serial conversion for such applications.
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