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An input-constrained channel, or simply a constraint, is a set of S of words that is generated by a finite labeled directed graph. In the context of coding, the study of constraints mainly aims at designing encoders that map unconstrained input words into words of S in a lossless manner. In most applications, the encoders are finite-state machines that map(More)
1 Motivation Figure 1: A perspective schematic of high frequency wobbles. This paper presents an overview of a new method of write clock generation on rewritable DVD drives that eliminates many of the problems associated with reading rewritable disks in DVD-ROM drives. It is believed that such a format will provide tremendous benefits to the end user,(More)
Consider a (d 1 k 1)-RLL constraint that is contained in a (d 2 k 2)-RLL constraint , where k 1 2d 1 and d 2 > 0, and x a codeword length q > k 2. It is shown that whenever there exist block decodable encoders with codeword length q for those two constraints, there exist such encoders where one is a subgraph of the otherr furthermore, both encoders can be(More)
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