Method and apparatus for prioritizing video frame retrieval in a shared disk cluster
US6609149B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 12, 1999 |
| Grant date | Aug 19, 2003 |
| Priority date | — |
| Expiry date | Apr 12, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N21/2393
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A first frame deadline is calculated and attached to an I/O request for prioritizing and retrieving video data frames from a shared disk cluster. Disk adapters queue video data frame requests according to the deadline incorporated in the frame requests. Data frames are transmitted to a requesting end user utilizing the attached deadline time to schedule the frames according to a time priority. Alternatively, a “slack” time is computed and utilized to determine when the first frame and subsequent frames of the requested video data may be retrieved from disk and present in the video server's memory in order to avoid a visible delay in sending that frame to the end user.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.