Coded data generation or conversion – Digital code to digital code converters – To or from variable length codes
Patent
1996-05-10
1998-05-12
Hoff, Marc S.
Coded data generation or conversion
Digital code to digital code converters
To or from variable length codes
341 65, 341106, H03M 740
Patent
active
057512337
ABSTRACT:
A decoder decodes input codes, such as Modified Huffman, Modified READ, and Modified Modified READ codes, and includes a zero bit detector which detects the number of consecutive leading zero bits of the input code. An address compressor forms address data by performing a logical operation of data indicating the number of detected zero bits and data excluding the consecutive leading zero bits and the next one bit of the data. A reference table for code conversion is addressed by the formed address data from the address compressor and outputs decoded data corresponding to the input code.
REFERENCES:
patent: 4475174 (1984-10-01), Kanayama
patent: 4591829 (1986-05-01), Takeda
patent: 5227789 (1993-07-01), Barry et al.
patent: 5254991 (1993-10-01), Ruetz et al.
patent: 5268769 (1993-12-01), Tsuchiya et al.
Minami Yuji
Tateno Tetsuya
Canon Kabushiki Kaisha
Hoff Marc S.
Kost Jason L. W.
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