Coded data generation or conversion – Digital code to digital code converters – To or from minimum d.c. level codes
Reexamination Certificate
2007-08-21
2007-08-21
Barnie, Rexford (Department: 2819)
Coded data generation or conversion
Digital code to digital code converters
To or from minimum d.c. level codes
C382S232000
Reexamination Certificate
active
11443427
ABSTRACT:
In a data encoding apparatus, when a prefix length calculation and determination units determine that the code length of a variable length code constituted of continuous bits “0” is equal to or greater than the predetermined maximum prefix length max_prefix during Golomb-Rice encoding of encoding subject data having a fixed length of D bits, second encoding is performed in place of the Golomb-Rice encoding. The second encoding is performed by having a prefix generation unit generate a prefix constituted of continuous bits “0” corresponding to the max_prefix, and having a code generation unit attach the prefix to the upper order bits of the encoding subject data. Furthermore, when a control code such as a restart marker is to be attached, a marker generation unit generates, as the control code, a code constituted of continuous bits “0” by the number which is equal to or greater than the length of (max_prefix+2×D).
REFERENCES:
patent: 2006/0269147 (2006-11-01), Shen et al.
patent: 09-247423 (1997-09-01), None
Barnie Rexford
Lauture Joseph
Olympus Imaging Corp.
Pokotylo John C.
Straub and Pokotylo
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