Difference coding adaptive context model

Details Difference coding adaptive context model Difference coding adaptive context model

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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