Dynamic information storage or retrieval – Binary pulse train information signal – Binary signal gain processing
Patent
1994-06-06
1995-02-21
Psitos, Aristotelis
Dynamic information storage or retrieval
Binary pulse train information signal
Binary signal gain processing
369124, 341 67, G11B 700
Patent
active
053922700
ABSTRACT:
Disclosed is an information recording/reproducing apparatus using an optical recording medium, which can reproduce information from a recording medium designed to have a high linear recording density, by a method of performing signal separation/extraction by one threshold level in a level detecting process at the time of information reproduction from an optical recording medium with a high linear recording density. The information recording apparatus comprises a data converting means for perform data conversion on record information consisting of a digital signal in accordance with a predetermined data conversion table including a pattern for yielding a converted pattern consisting of at least one "0" and an even number of consecutive "1" or a converted pattern having a section consisting of "01010" and a section consisting of at least one "0" or an even number of consecutive "1"; a data modulating means for inverting an initial output signal when bit information of data after the data conversion is "1" given that the initial output signal is "0"; and a recording means for recording the output signal on an optical recording medium. The information reproducing apparatus comprises a reading means for reading information from the optical recording medium to yield a reproduced signal; a level detecting means for detecting a level of the reproduced signal and outputting digital data; an error correcting means for, upon detection of a sequence of "01110" in a bit pattern of the digital data, correcting the sequence to a sequence of "01010" and outputting corrected data, and, upon detection of no error, outputting the digital data; and a data reverse converting means for performing reverse conversion on the output data of the error correcting means in accordance with the data conversion table, yielding reproduced information.
REFERENCES:
patent: 4484176 (1984-11-01), Fitzpatrick
patent: 4584616 (1986-04-01), Allen
patent: 4833471 (1989-05-01), Tokuume et al.
patent: 4866692 (1989-09-01), Saito et al.
Funamoto Kyota
Okada Shin-ichi
Edun Muhammad N.
Pioneer Electronic Corporation
Psitos Aristotelis
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