| 摘要 |
An encoded signal free of dc content is provided by modifying the Miller encoding scheme for digital data streams. The digital data stream is broken up into a sequence of blocks delineated by a one-to-zero transition at the beginning of each block. Each block is further subdivided such that the first half contains only zeros and the second half contains only ones. The number of zeros and ones are counted and novel encoding rules are applied depending on whether the number of ones and zeros is odd or even. If both the number of zeros and ones is even or odd, or the number of zeros is even and the number of ones is odd, encoding is accomplished using standard Miller rules. If the number of zeros is odd and the number of ones is even, Miller rules are used except the last one in the group is ignored. When both the number of zeros and ones is odd, special encoding rules are applied to the next block, dependent on the content of the next block.
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