Methods And Systems For Image Intra-Prediction Mode Management

摘要

Embodiments of the present invention relate to methods and systems for ordering, communicating and applying pixel intra-prediction modes.

主权项

1. An image decoding system for decoding a digital image comprising:
a) means for decoding each of blocks into which an image is divided; b) intra-prediction means for predicting values of pixels located along a specified direction in a target block to be decoded; and c) prediction mode estimating means for estimating a prediction mode for the target block; wherein d) the intra-prediction means uses at least a Diagonal Down/Left prediction mode using the specified direction being diagonally downward to the left at approximately a 45 degree angle, a Diagonal Down/Right prediction mode using the specified direction being diagonally downward to the right at approximately a 45 degree angle as the prediction mode, e) the prediction modes are numbered with increasingly larger numbers, in order of the Diagonal Down/Left prediction mode and the Diagonal Down/Right prediction mode, and f) the prediction mode estimating means determines a prediction mode to have the lower mode number among the prediction mode of a first block located adjacent to and above the target block and the prediction mode of a second block located adjacent to the left side of the target block.