Digital data recording and reproducing method

Details Digital data recording and reproducing method Digital data recording and reproducing method

1986-02-25

1988-03-15

Canney, Vincent P.

Dynamic magnetic information storage or retrieval

General processing of a digital signal

In specific code or form

G11B 509

Patent

active

047316780

ABSTRACT:
A digital data recording and reproducing method in which a digital data sequence is divided into 8-bit digital data sequences. When the divided 8-bit digital data sequences are encoded into 14-bit code, an 8-bit digital data sequence wherein the value of its DSV (digital sum variation) is limited to a predetermined range is selected from two codes which are assigned to correspond to the 8-bit digital data sequence. In the encoding process, the number of "0" bits which are inserted between two "1" bits in the code sequence is restricted to a number of from one to eight so that the DC component in the code sequence can be eliminated. A bit sequence which never arises in two successive 14-bit code words may then be used as a frame synchronizing signal.

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