Dynamic information storage or retrieval – Binary pulse train information signal – Binary signal gain processing
Patent
1996-12-19
1998-03-17
Hindi, Nabil
Dynamic information storage or retrieval
Binary pulse train information signal
Binary signal gain processing
H04N 576
Patent
active
057295182
ABSTRACT:
Signals corresponding to the front edge and the rear edge of a pit of an optical signal are sampled and thereby a pair of signals Vx and Vy are obtained. Since two-dimensional decoders map all combinations of the low order three bits of six bits of recorded data, they also decode the high order three bits of the recorded data. Estimated value calculating circuits output estimated values Vx' and Vy' corresponding to the decoded outputs. Subtracting devices and square calculating devices calculate the distances (error powers) between real reproduced signals and estimated value. With a plurality of error powers that chronologically vary, a Viterbi decoding circuit generates decoded output data.
REFERENCES:
patent: 5583889 (1996-12-01), Citta et al.
Journal of Information Processing Society of Japan, vol. 72, No. 3, pp. 306-316, Mar. 1989.
IEEE Transactions on Information Theory, vol. IT-28, No. 1, Jan. 1982 (this document discloses in English the basic method for the above document).
Hindi Nabil
Sony Corporation
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