Coded data generation or conversion – Digital code to digital code converters – Adaptive coding
Reexamination Certificate
2008-02-27
2009-11-03
JeanPierre, Peguy (Department: 2819)
Coded data generation or conversion
Digital code to digital code converters
Adaptive coding
C341S050000
Reexamination Certificate
active
07612693
ABSTRACT:
Techniques for improving encoding and decoding data are described herein. According to one embodiment, in response to a symbol retrieved from an input stream having a sequence of symbols, it is determined whether a current context can encode the retrieved symbol. A code representing an escape token is emitted to a code stream if the current context cannot encode the retrieved symbol. The process is escaped from the current context to a parent context of the current context if the current context is not a root context. The retrieved symbol is emitted to a literal stream if the current context is a root context, where the code stream and the literal stream are to be compressed and decoded by a decoder.
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Blakely , Sokoloff, Taylor & Zafman LLP
Jean-Pierre Peguy
Red Hal, Inc.
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