Dynamic information storage or retrieval – Binary pulse train information signal – Binary signal gain processing
Patent
1997-06-05
1998-10-27
Hindi, Nabil
Dynamic information storage or retrieval
Binary pulse train information signal
Binary signal gain processing
369 54, G11B 700
Patent
active
058286403
ABSTRACT:
The invention provides an apparatus containing a modulating circuit which can be used with an information recording device or the like, capable of correcting an error due to the change in RF signal level caused by noise or the like without a significant reduction in the storage capacity of the associated recording medium. The modulating circuit generates a signal corresponding to digital information consisting of units, each consisting of a predetermined plurality of bits. These units are assigned coordinate points in a two-dimensional plane and grouped according to their proximity to each other. Predetermined bits of each unit are mapped according to whether the value of the bits is 1 or 0. Based on this mapping process, error correction codes are output. The resultant error correction code is added at part of the bits comprising the predetermined plurality of bits.
REFERENCES:
patent: 5557592 (1996-09-01), Kobayashi et al.
patent: 5566158 (1996-10-01), Kobayashi et al.
patent: 5615193 (1997-03-01), Kobayashi et al.
patent: 5699337 (1997-12-01), Kobayashi
Hindi Nabil
Sony Corporation
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