Real-time latency measurement of video streams
US11638051B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 26, 2021 |
| Grant date | Apr 25, 2023 |
| Priority date | — |
| Expiry date | Jul 29, 2041 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L41/509
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Frames of a video stream collected at first and second points along a video delivery chain are buffered into first and second buffers, respectively, the second point being downstream the video delivery chain from the first point. A control group is identified as a subset of frames of the second buffer. Correlations of extracted features of the control group to extracted features of successive windows of frames of the first buffer are computed, the extracted features being based on spatial information and temporal information of the video stream. A delay between the video stream collected at the first point and the video stream collected at the second point is identified according to a maximum correlation of the correlations.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.