Patent ID: 9450845
Filing Date: 2016-09-20
CPC Classification: H04L,H04W

Claim Text:
1. An apparatus comprising: at least one processor and at least one memory including a computer program code, the at least one memory and the computer program code configured to, with the at least one processor, cause the apparatus at least to: search for packet losses; determine a type of a frame wherein at least one packet loss took place and amount of lost information; determine events affecting user experience based on the type of the frame and the amount of lost information; estimate a first quality indicating parameter for each of the events affecting user experience, wherein the first quality parameter comprises objective quality information, and estimate a second quality indicating parameter by using the first quality indicating parameter, wherein the second quality indicating parameter comprises subjective quality information, wherein the first quality indicating parameter is a peak signal-to-noise ratio (PSNR) value, wherein the PSNR is defined as a ratio between a maximum possible power of a signal and a power of noise that affects the reliability of values estimated from a received signal, wherein the determination of events affecting user experience is carried out based on Error Propagation Time (EPT) and Data Error Ratio (DER) parameters, wherein the at least one memory and the computer program code are further configured to, with the at least one processor, cause the apparatus at least to transform the EPT and DER into PSNR as an objective quality metric, and wherein the at least one memory and the computer program code are further configured to, with the at least one processor, cause the apparatus at least to map information on the type of a frame a packet loss corresponds to and the DER to a transfer matrix including values for each frame type.