Second-order orthogonal spatial intra prediction

摘要

Second-order orthogonal spatial intra-prediction may include generating a reconstructed frame by generating a plurality of reconstructed blocks by decoding a portion of the current encoded frame, generating a decoded residual block by decoding a current block from the current encoded frame, identifying a current pixel location in the current block, identifying reconstructed pixels in respective reconstructed blocks, wherein first and second reconstructed pixels are at respective oblique angle to the current pixel location, and a third reconstructed pixel at the second oblique angle to the first reconstructed pixel or at the first oblique angle to the second reconstructed pixel, determining a predictor pixel for the current pixel location using a difference between the third reconstructed pixel and a sum of the first reconstructed pixel and the second reconstructed pixel, and identifying a reconstructed pixel as a sum of the predictor pixel and a corresponding residual pixel.

主权项

1. A method for processing a frame of a video stream, the method comprising:
receiving an encoded video stream; identifying a current encoded frame from the encoded video stream; generating, by a processor in response to instructions stored on a non-transitory computer readable medium, a reconstructed frame by decoding the current encoded frame, wherein generating the reconstructed frame includes:
generating a plurality of reconstructed blocks by decoding a portion of the current encoded frame,identifying a current block from the current encoded frame,generating a decoded residual block by decoding the current block,identifying a current pixel location in the current block,identifying a first reconstructed pixel in a first reconstructed block from the plurality of reconstructed blocks, wherein the first reconstructed pixel is at a first oblique angle to the current pixel location,identifying a second reconstructed pixel in a second reconstructed block from the plurality of reconstructed blocks, wherein the second reconstructed pixel is at a second oblique angle to the current pixel location,identifying a third reconstructed pixel in a third reconstructed block from the plurality of reconstructed blocks, wherein the third reconstructed pixel is at least one of at the second oblique angle to the first reconstructed pixel or at the first oblique angle to the second reconstructed pixel,determining a predictor pixel for the current pixel location using a difference between the third reconstructed pixel and a sum of the first reconstructed pixel and the second reconstructed pixel,identifying a reconstructed pixel for the current pixel location as a sum of the predictor pixel and a residual pixel from the decoded residual block corresponding to the current pixel location, andincluding the reconstructed pixel in an output bitstream; and outputting the output bitstream for presentation.