Patent ID: 9672437
Date: 2017-06-06
CPC Classifications: G06K,H04N

Claim:
1. A method for video signal processing comprising: identifying an overlay region of interest (ROI) in a frame of a video signal; identifying a Snellen acuity factor value n in minutes of arc for gap sizes of text of the ROI; setting a minimum ROI size limited to 1/n, while remaining portions of the frame of the video can be further reduced in size; providing the minimum ROI size relative to a remaining portion of the frame of the video signal so that when a screen display size is below a predetermined amount, the ROI can be scaled relative to the remaining portion of the frame of the video signal; and providing the minimum ROI size as metadata with the frame to a decoder for use in decoding the frame when a screen size for the decoded frame has a smaller form factor than an original form factor of the video signal.