Multithread processing of video frames

A decoder for decoding a video frame, the decoder comprising:

• a module for partitioning the frame along boundaries of a set of diagonally aligned rectangular blocks into a first group of rectangular blocks and a second group of rectangular blocks, the set of diagonally aligned rectangular blocks spans the frame from one border of the frame to another border of the frame, the first group of rectangular blocks comprising rectangular blocks on a first side of the boundaries of the set of diagonally aligned rectangular blocks, the second group of rectangular blocks comprising all remaining rectangular blocks in the frame that are not in the first group of rectangular blocks;
• a first computing resource for deblock filtering the first group of rectangular blocks;
• and
• a second computing resource for deblock filtering the second group of rectangular blocks, wherein the first and second computing resources perform deblock filtering of the first and second groups of rectangular blocks in parallel.

A system for deblock filtering a video frame, the system comprising:

• a module for identifying first and second pluralities of groups of pixels in the frame by partitioning the frame along a diagonal line that spans the frame from one border of the frame to another border of the frame, wherein the groups of pixels in the first plurality of groups of pixels do not depend on any group of pixels in the second plurality of groups of pixels for filtering, wherein a first group of pixels in the second plurality of groups of pixels depends on a second group of pixels in the first plurality of groups of pixels for filtering;
• and
• a first computing resource for deblock filtering the first plurality of groups of pixels;
• and
• a second computing resource for deblock filtering the second plurality of groups of pixels, wherein the first and second computing resources perform deblock filtering of the first and second pluralities of groups of pixels in parallel.