Method and apparatus for cross-component prediction for video coding

Abstract

A method for decoding video data, comprising: obtaining internal luma sample values of a video block from a bitstream, obtaining neighboring luma and chroma sample values of the video block; calculating first filtered values based on the neighboring luma sample values for each direction of a number of directions, wherein each of the first filtered values is calculated based on sample differences between luma sample values in the direction, accumulating the first filtered values for each direction of number of directions respectively to obtain accumulated values; determining a direction of number of directions for which an accumulated value is the largest one of the accumulated values among the number of directions, applying the determined direction as a direction for predicting internal chroma sample values of video block based on the internal luma sample values of the video block, and obtaining decoded video block using the predicted internal chroma sample values.