Buffer fullness indicator
US5365552A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 16, 1992 |
| Grant date | Nov 15, 1994 |
| Priority date | — |
| Expiry date | Nov 16, 2012 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/50
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The inventive method for indicating the level of buffer fullness of a data receiving device may be applied to editing processes and to general synchronization problems including problems involving clocks running at different speeds. The method of the present invention includes embedding into a transmitted bit stream a signal representing the fullness of the buffer of the receiving device, as calculated by the transmitting device. Thus, the bit stream received by the receiving device periodically includes a signal that indicates how full the transmitter model predicts the receiving buffer is. The receiving device applies a model decoder algorithm to the received bit stream and determines how full the buffer should be at different points for comparison with the periodic indicators.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.