Methods and apparatus for controlling video playback
US7786998B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 12, 2004 |
| Grant date | Aug 31, 2010 |
| Priority date | — |
| Expiry date | Feb 12, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N5/915
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The present disclosure discusses methods and apparatus for controlling the video playback in a video playback system. In particular, a method for controlling video playback includes receiving a flip call to display video data from a flip queue buffer. Processing of the video data is then initiated. Flip acknowledgement information is issued in response to receiving the flip call information and prior to completion of the processing of video data to be displayed from the flip queue buffer. By issuing flip acknowledgement information regardless of whether the processing of the video data has been completed, video flip calls can continue to be issued at a constant rate and other processing can continue without waiting, thus resulting in better and smoother video playback and economizing processing resources. Additionally, a decision whether or not to drop a particular video frame is made based on whether a flip queue buffer from a predetermined number of flip queue buffers is available. The disclosed apparatus includes a flip manager, such as under the control of a driver, that controls the timing of video frame flips, rather than an application controlling the timing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.