Patent ID: 11956459
Assignee: ARRIS ENTERPRISES LLC
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H | IPC H

Claim 7:
8. A method for predicting pixel values in a decoder for an encoded bitstream each of which having a respective position x, y for a current coding block based upon pixels on an upper side of the current coding block and left side of the current coding block the method configured to:
calculate a first predictor for a pixel in the current coding block based upon a first value which is determined by a summation of (i) a height of said coding block, (ii) minus 1, (iii) minus y; a second value determined by said first value multiplied by a value of a pixel location of said pixel locations on said upper side of the current coding block at horizontal position x; a third value which is determined by a summation of (i) y, (ii) plus 1; a fourth value determined by said third value multiplied by a value of a pixel location of said pixel locations on said left side of the current coding block at a vertical position of said height of said coding block; said first predictor based upon a summation of said second value and said fourth value;
calculate a second predictor, different from the first predictor, for the pixel in the current coding block based upon a fifth value which is determined by a summation of (i) a width of said coding block, where said height of said coding block is different than said width of said coding block, (ii) minus 1, (iii) minus x; a sixth value determined by said fifth value multiplied by a value of a pixel location of said pixel locations on said left side of the current coding block at a vertical position y; a seventh value which is determined by a summation of (i) x, (ii) pus 1; an eighth value determined by said seventh value multiplied by a value of a pixel location of said pixel locations on said upper side of the current coding block at a horizonal position of said width of said coding block; said second predictor based upon a summation of said sixth value and said eighth value;
calculate an adjustment factor that is based upon said width of said coding block multiplied by said height of said coding block, and
wherein said height of said coding block is different value than said width of said coding block such that said coding block is rectangular;
derive a prediction pixel value from the first and second predictors together with said adjustment factor, wherein a plurality of prediction pixel values make up a prediction block.