MODULATION APPARATUS AND METHOD, AND DSV CONTROL BIT GENERATION METHOD

摘要

A modulation apparatus and method, and a DSV control bit generation method capable of deciding a DSV control bit value to be inserted into a data string accurately. A 1-7PP data conversion unit (52) supplies a modulation break detection unit (81) with modulation break information consisting of information on the modulation break of a data string using the conversion table of Table 3 and a valid break detection unit (82) with a DSV interval break signal including information on a DSV interval break position of the data string into which a DSV control bit has been inserted. According to the modulation break information supplied, the modulation break detection unit (81) detects a modulation break position and supplies a modulation break signal to the valid break detection unit (82). According to the DSV interval break signal supplied, the valid break detection unit (82) detects a valid break position controlling the judgment timing of the DSV control bit of the corresponding DSV interval among the modulation break positions indicated by the modulation break signal supplied. The present invention can be applied to a modulation apparatus.