Adaptive intra-refreshing for video coding units

A method, comprising:

• receiving, by a video processing device, a picture from a first group of pictures within a video stream, the first group of pictures defined as beginning with a first intra-predicted picture, the video stream comprising a second group of pictures following the first group of pictures, the second group of pictures defined as beginning with a second intra-predicted pictures;
• determining, by the video processing device, that the picture is to be encoded as an inter-coded picture;
• determining, by the video processing device, a first distance between the picture and the first intra-predicted picture of the first group of pictures;
• determining, by the video processing device, a second distance between the picture and the second intra-predicted picture of the second group of pictures;
• determining, by the video processing device, a relative location of the picture within the first group of pictures using the first distance and the second distance;
• selecting, by the video processing device, one of inter-prediction or intra-prediction to encode a pixel group within the picture to be encoded as the inter-coded picture based at least in part on the relative location of the picture within the first group of pictures;
• and
• encoding, by the video processing device, the pixel group using the selected one of inter-prediction or intra-prediction.

A non-transitory computer-readable medium embodying a program executable by processing circuitry, the program being configured to:

• receive a frame from a first group of frames within an uncompressed video stream, the first group of frames defined as beginning with a first intra-predicted frame, the uncompressed video stream comprising a second group of frames following the first group of frames, the second group of frames defined as beginning with a second intra-predicted frame;
• determine that the frame is to be encoded as an inter-coded frame;
• determine a first distance between the frame and the first intra-predicted frame of the first group of frames;
• determine a second distance between the frame and the second intra-predicted frame of the second group of frames;
• determine a nearest intra-predicted frame using the first distance and the second distance;
• for each coding unit in the frame:
• select one of an inter-predicted mode or an intra-predicted mode using a bias factor corresponding to a temporal distance between the frame and the nearest intra-predicted frame within the uncompressed video stream;
• and
• encode the coding unit using the selected one of the inter-predicted mode or the intra-predicted mode.