Method and apparatus for data encoding

Details Method and apparatus for data encoding Method and apparatus for data encoding

2008-05-20

2008-05-20

Mai, Lam T. (Department: 2819)

Coded data generation or conversion

Digital code to digital code converters

Adaptive coding

C341S050000

Reexamination Certificate

active

07375658

ABSTRACT:
A method and apparatus for data encoding such as 3 to 4 encoding (base64, uuencode etc.) is provided. Bytes of data to be encoded having negative values are made positive while preserving the information to be encoded. The positive values may be manipulated by addition (e.g. to a common store) and bit shifting to efficiently obtain encoded data such as by indexing an encoding alphabet.

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S. Josefsson, Ed.: “The Base16, Base32, and Base64 Data Encodings” Internet Article, RFC 3548 [Online] Jul. 2003, XP002338496 Retrieved from the Internet: URL:http://www.rfc-editor.org/rfc/rfc3548.txt> [retrieved on Jul. 28, 2005] *p. 3, line 17-line24* *table1*.
Mikael Grev: “Based64.java” BASE64—2.2.ZIP, [Online] Aug. 7, 2004, XP002338497 Retrieved from the Internet: URL:http://migbase64.sourceforge.net/> [retrieved on Jul. 28, 2005] *p.3, line 14-line 19*.

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