Method to speed up the mode decision of video coding
OwnerHomer Chen, Che-Yu Chang +1inventors
InventorsHomer Chen, Che-Yu Chang, Chia-Ho Pan
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Abstract
This invention provides a method to speed up mode decision in video coding standards. It is based on the characteristics of mode distribution and the relationship among the modes of neighboring blocks. It compares the main steps of checking SKIP mode, checking if neighboring blocks have a same mode, checking the best mode, and checking each mode in all inter modes then selecting the best one of these modes. Compared to the H.264 reference software full search method, the simulation result shows that this method can save up to 66.81% of the total encoding time with a slight increase in bit rate and a negligible PSNR drop.
Claims17
A method for speeding up the mode decision of video coding, every macroblock of every frame in said video coding corresponds to a mode, said mode is chosen from the group of SKIP mode, inter mode, and intra mode, said method comprises the steps of:
- (a) determining if the best mode of a current macroblock X of a current frame is the SKIP mode by using a threshold T1, and stopping here if the answer is yes;
- (b) checking if the neighboring macroblocks of said current macroblock X have the same mode, and going to step (d) if the answer is no;
- (c) determining if the best mode of said current macroblock X is said same mode by using a threshold T2, and stopping here if the answer is yes;
- and
- (d) checking all the inter modes in order and selecting the best mode of said current macroblock X from them.
Dependencies are inferred from the claim text.