Patent ID: 9554156
Date: 2017-01-24
CPC Classifications: H04N

Claim:
1. A method for fade detection and determination of global or local nature of the fade in a transition from one picture to a next picture of a video signal, the method comprising: providing a plurality of frames of a picture and related prediction reference frames; for each frame and related prediction reference frame; calculating or obtaining one or more intensity related values and one or more color related values in a first color domain, wherein the calculated one or more intensity related values and the one or more color related values comprise color components; for each frame and related prediction reference frame, calculating weighted prediction gains for each calculated color component value in the first color domain; if the weighted prediction gains are all non-negative and substantially similar to each other, then determining that a global transition with zero offset is occurring in a second color domain, wherein the weighted prediction pains are substantially similar to each other if the gains are within a threshold of 5% to 10% of each other; and, if the weighted prediction gains are not all non-negative and substantially similar to each other, then determining that at least one of the following is not occurring: a global fading transition; a global fading transition with zero offset; or a global fading transition with zero offset in the second color domain.