Dynamic information storage or retrieval – Binary pulse train information signal – Binary signal gain processing
Patent
1990-06-11
1993-11-09
Young, W. R.
Dynamic information storage or retrieval
Binary pulse train information signal
Binary signal gain processing
369124, 360 40, 360 32, G11B 700, G11B 509
Patent
active
052609170
ABSTRACT:
A signal reproduction apparatus reproduces data from an information recording disc. The data is recorded for every data block and is modulated so that data in one data block has n (n is an integer) bits including arbitrary m (m is integer and less than the n) bits each having an active value. The signal reproduction apparatus includes, a reading circuit reading out the data from the information recording disc, a converter converting the data into a pulse signal for every data block, the pulse signal having an active pulse corresponding to the active value of the data and an inactive pulse corresponding to the inactive value of the data, a judgment circuit judging whether or not the pulse signal has m active pulses for every data block, and a correction circuit correcting the pulse signal so that the pulse signal has m active pulses in one data block when the judgment circuit judges that the pulse signal has a number of active pulses other than the m in the one data block.
REFERENCES:
patent: 4088876 (1978-05-01), Rege
patent: 4498177 (1985-02-01), Larson
patent: 4646281 (1987-02-01), Verboom
patent: 5016258 (1991-05-01), Tanaka et al.
patent: 5042037 (1991-08-01), Endoh
Huber P. W.
Teac Corporation
Young W. R.
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