Patent attributes
An example method includes determining a respective variance value for pixels of each respective sub-block of at least four sub-blocks of a current block of video data of a particular block size; determining an average of the determined variance values for the at least four sub-blocks; determining a maximum difference value for the current block based on the average and the variance values for the at least four sub-blocks; determining whether pixels of the current block are homogeneous based on whether the maximum difference value for the current block satisfies a threshold difference value; and in response to determining that the pixels of the current block are homogeneous, selectively including block sizes that are greater than or equal to a threshold block size in a sub-set of block sizes to evaluate for use when intra encoding the pixels of the current block.
