Recording apparatus
First Claim
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1. A recording apparatus for recording digital data, comprising:
- means for orthogonally transforming a time axis of the digital data to a frequency axis on a block-by-block basis producing digital orthogonally transformed data;
means for converting the digital orthogonally transformed data to digital recording data; and
means for causing the converting means to convert the digital orthogonally transformed data to digital recording data which substantially cannot be restored to the original digital data.
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Abstract
A recording apparatus for recording a digital data, which includes an orthogonal transform unit for transforming the time axis of the digital data to the frequency axis on a block-by-block basis, a conversion circuit for converting the digital data from the orthogonal transform means to a digital recording data and a circuit for causing the conversion circuit to convert the digital data to a recording data which is substantially impossible to be restored to the original digital data.
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9 Claims
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1. A recording apparatus for recording digital data, comprising:
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means for orthogonally transforming a time axis of the digital data to a frequency axis on a block-by-block basis producing digital orthogonally transformed data; means for converting the digital orthogonally transformed data to digital recording data; and means for causing the converting means to convert the digital orthogonally transformed data to digital recording data which substantially cannot be restored to the original digital data. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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Specification