Dynamic information storage or retrieval – Binary pulse train information signal – Binary signal gain processing
Patent
1997-04-07
2000-01-04
Hindi, Nabil
Dynamic information storage or retrieval
Binary pulse train information signal
Binary signal gain processing
369124, 369 58, H04N 576
Patent
active
060117656
ABSTRACT:
A signal processing apparatus in which an analog signal having a first band is summed to a copying protection signal having a pre-set frequency in a second band sufficiently separated from the first band and the resulting sum signal is converted into a 1-bit digital signal which is then recorded on a recording medium. Therefore, if a user annuls the copying protection on purpose, the sum signal is converted into a multi-bit signal at the time of removing the pre-set frequency, preventing the original 1-bit signal from being copied. Thus it becomes possible to inhibit copying of the 1-bit digital signal in the high-band high-quality state proper to the 1-bit digital signal.
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Patent Abstract of Japan No. 04331517.
Hindi Nabil
Maioli Jay H.
Sony Corporation
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