Video Insert Control
AssigneeTelefonaktiebolaget LM Ericsson (publ)
InventorFrancis QUIERS
Life of this patent
Estimating the term…
Abstract
A program brightness metric representing a current brightness of a video program is determined. A corresponding insert brightness metric representing a current brightness of a video insert to be spliced into the video program during an ongoing video session is also determined. A decision whether to adjust brightness of at least an initial portion of decoded pictures of the video insert is made based on the program brightness metric and the insert brightness metric. Accordingly, a smooth transition between video programs and video inserts, such as advertisements, is enabled.
Claims29
A video insert control method comprising:
- determining a program brightness metric of a video program, said program brightness metric representing a current brightness of said video program;
- determining an insert brightness metric of a video insert, said insert brightness metric representing a current brightness of said video insert to be spliced into said video program during an ongoing video session;
- deciding whether to adjust brightness of at least an initial portion of decoded pictures of said video insert based on said program brightness metric and said insert brightness metric, wherein
- determining said program brightness metric comprise calculating said program brightness metric Bestp(t) based on Bestp(t)=αpBp (t)+(1−αp)Bestp(t−1), wherein αp is a smoothing factor that depends on a picture rate rp of said video program and a time constant τp, and Bp(t) is a brightness representing parameter of a current program and said video program;
- and
- determining (S2) said insert brightness metric comprises calculating (S2) said insert brightness metric Besti(t) based on Besti(t)=αiBi(t)+(1−αi)Besti(t−1), wherein αi is a smoothing factor that depends on a picture rate ri of said video insert and a time constant τi, and Bi(t) is a brightness representing parameter of a current picture of said video insert, wherein τi≤τp.
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A video insert control device, wherein said video insert control device comprises:
- a processor;
- and
- a memory comprising instruction executable by said processor, wherein said processor is operative to
- determine a program brightness metric of a video program, said program brightness metric representing a current brightness of said video program;
- determine an insert brightness metric of a video insert, said insert brightness metric representing a current brightness of said video insert to be spliced into said video program during an ongoing video session;
- and
- decide whether to adjust brightness of at least an initial portion of decoded pictures of said video insert based on said program brightness metric and said insert brightness metric;
- calculate said program brightness metric Bestp(t) based on Bestp(t)=αpBp(t)+(1−αp)Bestp(t−1), wherein αp is a smoothing factor that depends on a picture rate rp of said video program and a time constant τp, and Bp(t) is a brightness representing parameter of a current picture of said video program;
- and
- calculate said insert brightness metric Besti(t) based on Besti(t)=αiBi(t)+(1−αi)Besti(t−1), wherein αi is a smoothing factor that depends on a picture rate ri of said video insert and a time constant τi, and Bi(t) is a brightness representing parameter of a current picture of said video insert, wherein τi≤τp.
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Dependencies are inferred from the claim text.