H - Electricity – 04 – N
Patent
H - Electricity
04
N
H04N 17/00 (2006.01) H04H 60/35 (2009.01) G06T 7/00 (2006.01) G06Q 30/00 (2006.01)
Patent
CA 2563107
Methods and apparatus to detect blank images in a digital video broadcast signal are disclosed. An example method of detecting a blank image includes analyzing DC values of luminance blocks associated with a frame to determine a number of the luminance blocks having substantially the same DC value; and identifying the frame as a blank image if the number exceeds a predetermined threshold.
La présente invention se rapporte à des procédés et à des appareils permettant de détecter des images vides dans un signal de diffusion vidéo numérique. Un procédé exemplaire de détection d'une image vide consiste : à analyser des valeurs C.C. de blocs de luminance associés à une trame afin de déterminer le nombre de blocs de luminance présentant sensiblement la même valeur C.C. ; et à identifier la trame comme étant une image vide si ledit nombre dépasse un seuil déterminé.
Nielsen Media Research Inc.
Rowand Intellectual Property Law
The Nielsen Company (us) Llc
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