Invention Grant
- Patent Title: Systems and methods for decoding compressed data
- Patent Title (中): 压缩数据解码的系统和方法
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Application No.: US10679099Application Date: 2003-10-03
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Publication No.: US06903669B1Publication Date: 2005-06-07
- Inventor: Girish Subramaniam
- Applicant: Girish Subramaniam
- Applicant Address: US TX Austin
- Assignee: Cirrus Logic, Inc.
- Current Assignee: Cirrus Logic, Inc.
- Current Assignee Address: US TX Austin
- Agency: Thompson & Knight LLP
- Agent James J. Murphy
- Main IPC: H03M7/00
- IPC: H03M7/00 ; H03M7/30

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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