| 摘要 |
Apparatus for recovering double-frequency-encoded information words redundantly recorded on two tracks of a magnetic medium, including means for separating clock bits and data bits of the information words to produce redundant data words and including means for combining the data words to produce a data word corrected for the absence of a data bit in one of the information words. Means for indicating dissimilarities in like position data bits in the redundant data words is also disclosed. Additionally, a word end marker comprising dissimilar parity bits in each of the information words is checked with the parity of the corrected data word and produces an error signal for any dissimilarities therebetween.
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