Scalable video encoding rate adaptation based on perceived quality
US9591316B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 27, 2014 |
| Grant date | Mar 7, 2017 |
| Priority date | — |
| Expiry date | Mar 7, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/33
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Multi-layered video structures are scaled over a range of perceived quality levels. An estimated Mean Opinion Score (eMOS)-based encoder control loop is utilized to determine one or more encoder key performance index (KPI) associated with a particular perceived quality level. A KPI-based encoder control loop is then utilized to guide generation of a hierarchical structure having quality and/or temporal and/or spatial enhancement layers, without recalculating eMOS for the scalable structure. In addition, eMOS is used to guide the generation of a hierarchical structure at best-perceived quality levels for a given bitrate budget. Rate adaptation may occur by dropping segments, changing hierarchical structure, or changing the KPI target values. With the structure scaled as a function of perceived quality, perceived quality is impacted predictably as the encoding rate is adapted.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.