Television – Basic receiver with additional function – Multimode
Reexamination Certificate
2005-09-20
2005-09-20
Yenke, Brian P. (Department: 2614)
Television
Basic receiver with additional function
Multimode
C348S556000, C348S672000, C382S254000
Reexamination Certificate
active
06947097
ABSTRACT:
A process for detecting black bands in a video image within a luminance range corresponding to low luminance values comprises the steps of: calculating, for each line situated in a location in which a black band can be expected to be found if present in said video image, a value relating to a maximum number of occurrences of points having the same luminance value; averaging said value over said lines in said location; calculating a threshold dependent on said average; and, comparing said value relating to said maximum number of occurrences obtained for a new line with said threshold. Applications relate, for example, to the detection of the “letterbox” format.
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Fried Harvey D.
Johnson Christine
Thomson Licensing S.A.
Tripoli Joseph S.
Yenke Brian P.
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