Invention Grant
- Patent Title: Variable-length code determining device and variable-length code decoding method
- Patent Title (中): 可变长度码确定装置和可变长码解码方法
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Application No.: US12225422Application Date: 2007-03-15
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Publication No.: US07924179B2Publication Date: 2011-04-12
- Inventor: Takahiro Kumura
- Applicant: Takahiro Kumura
- Applicant Address: JP Tokyo
- Assignee: NEC Corporation
- Current Assignee: NEC Corporation
- Current Assignee Address: JP Tokyo
- Agency: Foley & Lardner LLP
- Priority: JP2006-079978 20060323
- International Application: PCT/JP2007/055221 WO 20070315
- International Announcement: WO2007/108395 WO 20070927
- Main IPC: H03M7/40
- IPC: H03M7/40
Abstract:
To provide a decoding device that compactly stores prefix related information therein compatible to variable-length codes used in various systems. The decoding device includes a register file in which a prefix common portion and a word length of the prefix common portion, prefix individual portions and word lengths of the prefix individual portions, word lengths of suffixes, and an input bit sequence are stored, a bit matching unit that determines a prefix included in the input bit sequence from prefixes generated from the prefix common portion and the prefix individual portions, a codeword computation unit that computes the word length of a codeword included in the input bit sequence using the respective word lengths of the prefix common portion, a prefix individual portion, and a suffix corresponding to the determined prefix, and an index computation unit that computes an index in a symbol table using the respective word lengths of the corresponding suffix and the codeword.
Public/Granted literature
- US20100225508A1 Variable-Length Code Decoding Device and Variable-Length Code Decoding Method Public/Granted day:2010-09-09
Information query
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