Patent ID: 8923411
Filing Date: 2014-12-30
Classification: H04L,H04N

Abstract:
1. A method of determining a quality value of a video stream transmitted to a media player, the method comprising, for a measuring interval of the video stream: identifying at least two lost data packets of the video stream; identifying intra coded frames of the video stream; determining, for each of the intra coded frames identified, that the intra coded frame has a maintained image quality if none of the lost data packets identified are associated with the intra coded frame; estimating, for each of the lost data packets identified, a distance between that lost data packet and the next intra coded frame that occurs subsequently to the lost data packet in the video stream and that has a maintained image quality, the distance based on a difference in data packet sequence numbers between that lost data packet and a data packet of that next intra coded frame; weighting the distances, for each of the lost data packets identified, wherein said weighting comprises weighting a relatively longer distance higher than weighting a relatively shorter distance, and wherein said weighting reflects that the longer the distance is, the longer an error propagates and the more impact the error has on the quality value; and generating the quality value, based on the weighted distances.