Television – Format conversion – Conversion between standards with different aspect ratios
Reexamination Certificate
2004-06-04
2010-10-26
Yenke, Brian P (Department: 2622)
Television
Format conversion
Conversion between standards with different aspect ratios
C348S441000, C348S459000
Reexamination Certificate
active
07821572
ABSTRACT:
This invention relates to an apparatus for processing an information signal etc. that, when converting, for example, SD signal into HD signal, enables well to be obtained pixel data of HD signal no matter whether the dynamic range DR is large or small. DR in a class tap is detected. If DR≧Th, items of pixel data y1-a−y4-acalculated by using item of coefficient data Wi-acorresponding to a class code Ca are estimated as items of pixel data of HD signal. If DR<Th, an addition mean value of items of pixel data y1-a−y4-a, y1-b−y4-bcalculated by using items of coefficient data Wi-a, Wi-bcorresponding to class codes Ca, Cb is estimated as item of the pixel data of HD signal. The items of coefficient data Wi-a, Wi-b are obtained by learning between a student signal corresponding to the SD signal and a teacher signal corresponding to the HD signal by using a portion of the DR having a value thereof that is not less than the threshold value Th. The code Ca is converted into the code Cb so that the addition mean value can most approach a true value of the pixel data of the HD signal.
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Chikaoka Shizuo
Haga Tsugihiko
Kikuchi Daisuke
Kondo Tetsujiro
Miyai Takeshi
Frommer William S.
Frommer & Lawrence & Haug LLP
Presson Thomas F.
Sony Corporation
Yenke Brian P
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