Patent ID: 8457211
Filing Date: 2013-06-04
Classification: H04N

Abstract:
1. A method of a video coder processor for computing intra prediction error feedback values, the method comprising: receiving via the video coder processor the image data, wherein the image data contains at least one macro block of pixels; computing an activity indicator for a macro block; computing prediction error values for pixels in the macro block, wherein computing the prediction error values comprises, for each pixel in the macro block computing a difference between a value of the pixel and an estimated reconstructed pixel value of its neighboring pixel wherein the estimated reconstructed pixel value of a current pixel is expressible as estimated reconstructed pixel value=A−f(A−a′), where A is the original pixel value of the current pixel, a′ is the estimated reconstructed pixel value of the current pixel's neighboring pixel, and f(A−a′) is a scaling function an intra-prediction error; and scaling the prediction error values based on the activity indicator to produce intra prediction error feedback values; and estimating the reconstructed pixel values for pixels in the macroblock from the original pixel values and the scaled prediction error values.