| US 7,511,636 B2 | ||
| Data conversion unit, data conversion method, and electronic apparatus using the data conversion unit | ||
| Toshio Takahashi, Hiratsuka (Japan) | ||
| Assigned to Ricoh Company, Ltd., Tokyo (Japan) | ||
| Filed on Aug. 27, 2007, as Appl. No. 11/845,313. | ||
| Claims priority of application No. 2006-233017 (JP), filed on Aug. 30, 2006; and application No. 2007-161528 (JP), filed on Jun. 19, 2007. | ||
| Prior Publication US 2008/0136685 A1, Jun. 12, 2008 | ||
| Int. Cl. H03M 7/00 (2006.01) | ||
| U.S. Cl. 341—50 [341/100; 341/101; 713/193] | 14 Claims |
| 1. A data conversion unit, comprising:
a first input/output unit;
a second input/output unit;
an encoder configured to encode data;
a decoder configured to decode data;
a random number generator configured to generate random number data; and
a control unit configured to select a first setting function, a second setting function, and a third setting function,
wherein, in the first setting function, the control unit sets to input data from the first input/output unit, to encode data
by the encoder, and to output the encoded data from the second input/output unit,
in the second setting function, the control unit sets to input data from the first input/output unit, to replace the data
with the random number data generated by the random number generator, and to output the random number data from the second
input/output unit;
in the third setting function, the control unit sets to input encoded data from the second input/output unit, to decode the
encoded data by the decoder, and to output the decoded data from the first input/output unit,
the control unit selecting any one of the first setting function, the second setting function, and the third setting function
based on a setting state set to the control unit.
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