Video coding using combined inter and intra predictors

摘要

Blocks of a video data stream may be encoded using either intra-frame (intra) prediction or inter-frame (inter) prediction. Combining intra and inter prediction can provide greater compression while maintaining the quality of the decoded video stream. Intra and inter prediction blocks are combined by weighting each block on a pixel-by-pixel basis and adding the weighted pixel values together. Weighting is based on the intra prediction mode. Pixels are weighted to give emphasis to intra predicted pixels closer to the boundaries where the predicted pixels originate and more emphasis to inter predicted pixels further away from the boundaries.

主权项

1. A method, comprising:
identifying an inter prediction block for a first block of a video frame; identifying an intra prediction block for the first block based on an intra prediction mode for the first block; forming, using a processor, a combined prediction block for the first block by combining weighted pixel values of the inter prediction block and weighted pixel values of the intra prediction block, wherein a weighting of each pixel value is based on the intra prediction mode; identifying weighting values according to a formula A+B−Kx; wherein
A, B and K are constants; andx represents a distance from the weighting value to a nearest prediction edge; and encoding the first block using the combined prediction block.