Weighted prediction video encoding
A coding source, psycho-visual technology, applied in the direction of digital video signal modification, television, image data processing, etc.
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[0051] In a gradual change, a series of images gradually increase or decrease the brightness and chroma amplitude, usually starting from 0, which means black, or decreasing to 0. Figure 2 is a simplified example, where logWD=0 and only the brightness value is obtained from an example of a P image, which is, for example, the previous image in the sequence. In Figure 2, the line 21 represents the maximum range that the luminance signal can obtain in the 8-bit binary system. The line 22 represents the actual range of the brightness in the reference MB of the reference image, specifically, it is between the integers a and b (a, bε[0, 255]). Line 23 represents the actual range of MB pixel values in the current image, which is between c and d. Assuming that all the brightness values in the reference image are in the range [a, b], and all the brightness values in the current image are in the range [c, d], and it is also assumed that the reference image (Ref-pic) 22 changes to the c...
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