Systems and methods for decoding compressed data

Details Systems and methods for decoding compressed data Systems and methods for decoding compressed data

2005-06-07

2005-06-07

Tokar, Michael (Department: 2819)

Coded data generation or conversion

Digital code to digital code converters

Coding by table look-up techniques

C341S059000, C341S065000, C341S067000

Reexamination Certificate

active

06903669

ABSTRACT:
A method of decoding an encoded bitstream. The method includes performing a table lookup. Addresses into the table are generated using selected numbers of bits drawn from the bitstream in response to values stored in the table entries. A table entry may contain an index offset and a number of bits to extract from the bitstream. Alternatively, the table entry may contain the decode result. The value of a result tag in the entry signals which of the alternatives is contained in the entry. The table is recursively accessed until a portion of the bitstream is decoded. Any remaining portion of the bitstream is decoded similarly. An initial index into the table is determined from a number of bits of the bitstream corresponding to the length of the smallest code word in the codetable used to encode the bitstream.

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