Pulse or digital communications – Bandwidth reduction or expansion – Television or motion video signal
Reexamination Certificate
2005-05-10
2005-05-10
Kelley, Chris (Department: 2613)
Pulse or digital communications
Bandwidth reduction or expansion
Television or motion video signal
C375S240200, C382S235000
Reexamination Certificate
active
06891892
ABSTRACT:
A MPEG-2 decoder receives an MPEG-2 video stream containing discrete cosine transform (DCT) blocks and generates linear contrast enhanced DCT blocks applied to an inverse DCT processor contained therein. Preferably, the MPEG-2 decoder includes a linear contrast enhancement processor receiving the DCT blocks and generating the linear contrast enhanced DCT blocks, and the inverse DCT processor coupled to the linear contrast enhancement processor. Additionally, the MPEG-2 decoder can include a microprocessor which controls the linear contrast enhancement processor and the inverse DCT processor. A method and a memory containing computer readable instructions permitting the microprocessor to control the MPEG-2 decoder are also described.
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Biao Chen et al; “Edge Enhancement of Remote Sensing Image Data in the DCT Domain”, Image and Vision Computing, Oct. 1999, Elsevier, Netherlands, vol. 17, No. 12, pp. 913-912 XP001128172.
Kelley Chris
Koninklijke Philips Electronics , N.V.
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