Assessing packet loss visibility in video
US9894351B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 18, 2012 |
| Grant date | Feb 13, 2018 |
| Priority date | — |
| Expiry date | Jul 26, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T2207/30168
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The invention presents a new NR-H method for assessment of packet loss visibility measure for a video sequence, where the measure is indicative of the effect on the perceptual quality of the video. Packet loss can occur as a result of the video being transmitted over an imperfect network. The invention combines dynamic modelling of temporal and spatial properties of the decoded pictures with bitstream information revealing location, extent and propagation of any errors. Analysis is performed on blocks of pixels, and preferably the macroblocks defined in the particular video encoding scheme. Knowledge of the error extent from the bitstream information is used to target spatial analysis around the specific error locations. Perceptual impact is estimated by utilizing spatio-temporal modelling to predict the properties of a missing block, and comparing those predictions with the actual properties of the missing block.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.