Method, system and apparatus for intra-prediction in video signal processing using combinable blocks

摘要

A method, apparatus and system for a video encoder for selecting a block of intermediate size from a set of block sizes for intra-prediction estimation for encoding a video signal. A set of neighboring blocks with the intermediate size are tested for combining. If the set of neighboring blocks are determined to be combinable, the video encoder selects a larger block size formed by the tested neighboring blocks for encoding. On the other hand, if the set of neighboring blocks are determined to be not combinable, the video encoder selects a smaller block size from the set of tested neighboring blocks for prediction. Furthermore, intra-prediction is determined by first intra-predicting a block with intermediate modes in a set of modes. Then the intra-predictions are performed for the neighboring modes of at least one intermediate mode.

主权项

1. A method comprising:
selecting an intermediate size from a set of block sizes for encoding a video signal; performing an intra-prediction estimation search for each block in a set of neighbouring blocks of the selected intermediate size to determine a plurality of best modes for the neighbouring blocks, each of best modes corresponding to a respective one of the neighbouring blocks; determining whether the neighbouring blocks of the selected intermediate size are combinable based on the best modes for the neighbouring blocks; when the neighbouring blocks are determined to be combinable, performing an intra-prediction estimation search for a first block of a first size that is larger than the selected intermediate size; and when the neighbouring blocks are determined to not be combinable, performing an intra-prediction estimation search for a second block of a second size that is smaller than the selected intermediate size.