Data compression

Details Data compression Data compression

2003-03-27

2009-02-10

Hu, Jinsong (Department: 2154)

Electrical computers and digital processing systems: multicomput

Distributed data processing

Client/server

C375S240120, C375S240160, C382S234000

Reexamination Certificate

active

07490123

ABSTRACT:
A data compression apparatus for performing data compression on input data comprises a quantisation parameter estimation arrangement for deriving an estimated value of a quantisation parameter used in a previous compression/decompression cycle applied to the input data, by detecting rounding effects in data values of at least a subset of the input data; and a parameter selection arrangement, responsive to the quantisation parameter estimation arrangement for selecting a quantisation parameter for use in compression of the input data.

REFERENCES:
patent: 6385241 (2002-05-01), Saw
patent: 6640012 (2003-10-01), Shnaider et al.
patent: 2002/0054644 (2002-05-01), Henry et al.
patent: 2003/0002583 (2003-01-01), Geerlings
patent: 2003/0048208 (2003-03-01), Karczewicz
patent: 2003/0161401 (2003-08-01), Shen et al.
patent: 0 509 576 (1992-10-01), None
patent: 1 103 919 (2001-05-01), None

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