Coded data generation or conversion – Digital code to digital code converters – To or from variable length codes
Reexamination Certificate
2005-10-11
2005-10-11
Tokar, Michael (Department: 2819)
Coded data generation or conversion
Digital code to digital code converters
To or from variable length codes
C341S106000, C341S107000
Reexamination Certificate
active
06954156
ABSTRACT:
The present invention correctly decodes data encoded with a variable-length encoding method that improves the compression ratio. The variable-length encoding method encodes a unit data composed of a plurality of sub-data while referencing a parameter table, and includes: an initialization step in which the parameter table is set to initial values; a parameter table information encoding step in which information related to the initialized parameter table is encoded; a parameter obtaining step in which encoding parameters to be used in the encoding of sub-data are obtained from the parameter table; a sub-data encoding step in which variable-length encoding of the sub-data is performed with reference to the obtained encoding parameters; and an encoded information placement step in which the encoded information is placed in a position in which the information can be obtained before the encoded unit data.
REFERENCES:
patent: 5856930 (1999-01-01), Hosono
patent: 5940289 (1999-08-01), Iwata et al.
patent: 5-199422 (1993-08-01), None
patent: 6-225279 (1994-08-01), None
patent: 8-46521 (1996-02-01), None
Kadono Shinya
Kondo Satoshi
Matsui Yoshinori
Matsushita Electric - Industrial Co., Ltd.
Nguyen John B
Tokar Michael
Wenderoth , Lind & Ponack, L.L.P.
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