Streaming media player varying a play speed from an original to a maximum allowable slowdown proportionally in accordance with a buffer state
US6665751B1 · kind B1 · utility
172Cited by
9References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 17, 1999 |
| Grant date | Dec 16, 2003 |
| Priority date | — |
| Expiry date | Apr 17, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N21/440281
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A media player for playing streaming media is capable of dynamically changing its play rate according to network conditions, so as to compensate for delayed packets. The player nominally plays at the prescribed data rate. When packets are delayed, instead of stopping to rebuffer, the player plays the stream slower. Audio pitch is unchanged as it is slowed, and video frame rate is slowed as necessary. A threshold is set so that slowing down beyond the threshold is not allowed. Should the buffer contents fall below a predescribed minimum, the player will then stop playing and rebuffer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.