Patent ID: 8731285

Claim:
A non-transitory computer-readable medium containing instructions that, when executed by a processor, cause a set of steps to be carried out for identifying a video aspect-ratio attribute of a current frame, said set of steps comprising: receiving said current frame; defining a region of said current frame, said defined region having a plurality of lumas within a luma range; calculating a non-black luma percentage of said defined region based on said lumas; calculating an average luma of said region based on said lumas; identifying said current frame as having a standard video aspect-ratio attribute responsive to every condition in a condition set being satisfied, said condition set comprising first and second conditions, said first condition being that said average luma is less than a max-black luma threshold, and said second condition being that said non-black luma percentage is less than a non-black luma percentage threshold; and storing in a memory an indication of said associated video aspect-ratio frame attribute, wherein said identified video aspect-ratio is predetermined based on a size and position of said region.