Other

Susumu Senshu

Tatsuya Narahara

Josephus A H M Kahlman

Marten Erik Van Dijk

Constant P M J Baggen

Kouhei Yamamoto

Ludovicus M G M Tolhuizen

Masayuk Hattori

Multiword information is based on multibit symbols disposed in relative contiguity with respect to a medium, and is encoded with a wordwise interleaving and wordwise error protection code for providing error locative clues across multiword groups. In particular, the clues originate in high protectivity clue words (BIS) that are interleaved among clue columns, and also in synchronizing columns constituted from synchronizing bit groups. The synchronizing columns are located where the clue columns are relatively scarcer disposed. The clues are directed to low protectivity target words (LDS) that are interleaved in a substantially uniform manner among target columns which form uniform-sized column groups between periodic arrangements of clue columns and synchronizing columns.

Encoding multiword information by wordwise interleaving

The present invention provides a reproduction clock phase correction circuit, which can detect and set a phase exceeding one clock (one pit), in which a resolution and a detection range are never changed even if a clock frequency is changed. The reproduction clock phase correction circuit is provided with a voltage control oscillator in which delay element in a plurality of stages are connected in a form of a ring, a clock selecting means for selectively extracting an output clock of the delay element at any stage in the voltage control oscillator as a reproduction clock, a sampling means for sampling, on the basis of the reproduction clock, a reproduction signal of a reference clock reproduced from a record medium, and a selection controlling means for detecting phase information of the reproduction clock for the reference clock on the basis of a sampling value by mean of the sampling means to thereby control the clock selecting means on the basis of the phase information.

Reproduction clock phase correction circuit

Growing community of inventors

Kitashinagawa-Ku, Japan

Susumu Senshu